概述
数据手册AV14K1812801HT 概述
High Temperature Automotive Grade Varistors
AV14K1812801HT 数据手册
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PDF下载Features
n Formerly a
product
n Non-plastic coating for better flammability
rating
n Five model sizes available - 0805, 1206,
1210, 1812 and 2220
n Supply voltages: 12 V, 24 V and 42 V
n +150 °C maximum continuous operating
temperature
n Load Dump Energy up to 50 J available upon
request
n Broad range of current and energy handling
capabilities
n RoHS compliant*
n Low clamping voltage - V
c
n AEC-Q200 Grade 0 upon request
n Non-sensitive to mildly activated fluxes
AVHT Series - High Temperature Automotive Grade Varistors
General Information
Multilayered Varistor Symbol
Almost all electronic systems in an automobile, e.g., anti-lock brake system, direct
ignition system, airbag control system, wiper motors, etc. are susceptible to damage
from destructive voltage transients. Bourns® AVHT Series multilayered varistors are
transient suppressors with temperature independent suppression characteristics
enabling protection from -55 °C to 150 °C.
U
AVHT Series varistors offer excellent transient energy distribution. AV varistors require
significantly less space and pad area than silicon TVS diodes, offering greater circuit
board layout flexibility for the designer.
Absolute Maximum Ratings
Parameter
Value
Units
Continuous:
Steady State Applied Voltage
DC Voltage Range (V
)
16 to 56
V
dc
Transient:
Load Dump Energy (WLD)
Jump Start Capability (5 minutes), (V
1 to 25 **
24.5 to 65
120 to 2000
0.3 to 30
J
V
A
J
)
jump
Peak Single Pulse Surge Current, 8/20 µs Waveform (I
)
max
Single Pulse Surge Energy, 10/1000 µs Waveform (W
Operating Ambient Temperature
Storage Temperature Range
)
max
-55 to +150
-55 to +150
< +0.05
°C
°C
Index
Features...................................................... 1
General Information .................................... 1
MLV Symbol................................................ 1
Absolute Maximum Ratings........................ 1
Device Ratings............................................ 2
Product Dimensions.................................... 3
How to Order............................................... 4
Typical Part Marking ................................... 4
Threshold Voltage Temperature Coefficient
Response Time
%/°C
ns
< 2
Climatic Category
55 / 150 / 56
** Load Dump Energy (WLD) up to 50 J available upon request.
Protection Level/
Pulse Rating Curves ................................5-7
Soldering Pad Configuration....................... 8
Packaging Specifications ........................8-9
Soldering Recommendations for
SMD Components................................10-12
Reliability - Lifetime................................... 13
Reliability Testing Procedures..............14-15
Terminology............................................... 16
Legal Disclaimer........................................ 17
Asia-Pacific: Tel: +886-2 2562-4117 • Email: asiacus@bourns.com
EMEA: Tel: +36 88 885 877 • Email: eurocus@bourns.com
The Americas: Tel: +1-951 781-5500 • Email: americus@bourns.com
www.bourns.com
WARNING Cancer and Reproductive Harm - www.P65Warnings.ca.gov
*RoHS Directive 2015/863, Mar 31, 2015 and Annex.
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
AVHT Series - High Temperature Automotive Grade Varistors
Device Ratings
V
V
I
I
W
WLD
P
C
typ
n
jump
c
max
max
V
V
V
c
rms
dc
@ 1 mA
5 min.
8/20 µs
8/20 µs 10/1000 µs 10 times max. @ 1 kHz
Model
V
V
V
V
V
A
A
J
J
W
nF
12 V Power Supply
AV 14 K 0805 121 HT
AV 14 K 1206 201 HT
AV 14 K 1210 401 HT
AV 14 K 1812 801 HT
AV 14 K 2220 122 HT
AV 17 K 0805 121 HT
AV 17 K 1206 201 HT
AV 17 K 1210 401 HT
AV 17 K 1812 801 HT
AV 17 K 2220 122 HT
14
14
14
14
14
17
17
17
17
17
16
16
16
16
16
20
20
20
20
20
24
24
24
24
24
27
27
27
27
27
24.5
24.5
24.5
24.5
24.5
30
40
40
40
40
40
44
44
44
44
44
1
1
120
200
400
800
1200
120
200
400
800
1200
0.3
0.6
1.6
2.4
5.8
0.5
1.1
1.8
2.9
7.2
1
1.5
3.
6
0.008
0.008
0.010
0.015
0.030
0.008
0.008
0.010
0.015
0.030
0.44
1.00
2.23
4.50
10.00
0.37
0.81
2.00
3.80
8.00
2.5
5
10
1
12
1
30
1
1.5
3
30
2.5
5
30
6
30
10
12
24 V Power Supply
AV 20 K 1206 201 HT
AV 20 K 1210 401 HT
AV 20 K 1812 801 HT
AV 20 K 2220 122 HT
AV 30 K 1206 201 HT
AV 30 K 1210 401 HT
AV 30 K 1812 801 HT
AV 30 K 2220 122 HT
20
20
20
20
30
30
30
30
26
26
26
26
34
34
34
34
22
22
22
22
47
47
47
47
30
30
30
30
50
50
50
50
54
54
54
54
77
77
77
77
1
2.5
5
200
400
1.6
1.9
3.0
8.0
2.0
2.3
3.8
10.0
1.5
3
0.008
0.010
0.015
0.030
0.008
0.010
0.015
0.030
0.78
1.65
3.30
7.00
0.53
1.10
2.20
6.50
800
6
10
1
1200
200
12
1.5
3
2.5
5
400
800
6
10
1200
12
42 V Power Supply
AV 40 K 1206 201 HT
AV 40 K 1210 401 HT
AV 40 K 1812 801 HT
AV 40 K 2220 122 HT
40
40
40
40
56
56
56
56
68
68
68
68
65
65
65
65
110
110
110
110
1
2.5
5
200
400
2.2
2.6
1.5
3
0.008
0.010
0.015
0.030
0.40
0.90
1.80
5.50
800
4.8
6
10
1200
10.5
12
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
AVHT Series - High Temperature Automotive Grade Varistors
Product Dimensions
Dimension
0.5 0.ꢀ5
(.0ꢀ0 .0ꢁ0ꢂ
Size
L
W
t (Max.)
2.0 0.25
(.079 .010ꢀ
1.25 0.20
(.049 .008ꢀ
1.0
(.039ꢀ
W
0805
1206
1210
1812
2220
3.2 0.30
(.126 .012ꢀ
1.60 0.20
(.063 .008ꢀ
1.2
(.047ꢀ
3.2 0.30
(.126 .012ꢀ
2.50 0.25
(.098 .010ꢀ
1.3
(.051ꢀ
t
L
4.7 0.40
(.185 .016ꢀ
3.20 0.30
(.126 .012ꢀ
1.3
(.051ꢀ
5.7 0.50
(.224 .020ꢀ
5.00 0.40
(.197 .016ꢀ
1.4
(.055ꢀ
MM
(INCHESꢀ
DIMENSIONS:
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
AVHT Series - High Temperature Automotive Grade Varistors
How to Order
Typical Part Marking
AV20K1210401NIR1HT
No marking.
Series Designator
AV = AV Series
Maximum Continuous Working Voltage (V
)
rms
20 = 20 V
AC
V
Tolerance
K = 10 %
n
Model Size
• 0805
• 1206
• 1210
• 1812
• 2220
Maximum Surge Current
• 121 = 120 A
• 201 = 200 A
• 401 = 400 A
• 801 = 800 A
• 122 = 1200 A
End Terminations
• NI = NiSn barrier type end terminations suitable for Pb and Pb-free reflow soldering
Packaging
R1 = 180 mm (7-inch) reel
R2 = 330 mm (13-inch) reel
Special Requirements
HT = High Temperature
Instructions for Creating Orderable Part Number:
1) Start with base part number in characteristics table (example: AV20K1210401).
2) Add End Termination: NI standard (example part number becomes
AV20K1210401NI).
3) Add Packaging: R1 (example part number becomes AV20K1210401NIR1).
4) Add High Temperature Special Requirement: HT (example part number becomes
AV20K1210401NIR1HT).
4) Part number can have no spaces or lower case letters.
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
AVHT Series - High Temperature Automotive Grade Varistors
Protection Level
Pulse Rating Curves
Model Size 0805 - (AV 14 K 0805 121 HT ~ AV 17 K 0805 121 HT)
Model Size 0805 - (AV 14 K 0805 121 HT ~ AV 17 K 0805 121 HT)
103
5
400
102
5
200
101
5
100
80
100
5
60
40
17
10-1
5
14
20
10-2
101
5
102
5
103
5
104
17
14
t
(µs)
p
10
8
6
4
10-5 10-4 10-3 10-2 10-1 100
101 102 103 104
I (Amps)
Model Size 1206 - (AV 14 K 1206 201 HT ~ AV 40 K 1206 201 HT)
Model Size 1206 - (AV 14 K 1206 201 HT ~ AV 40 K 1206 201 HT)
3
10
400
5
2
10
200
100
5
1
5
10
40
80
0
10
60
30
20
5
40
17
40
17
-1
30
20
10
5
14
-2
10
20
1
2
3
4
10
14
10
5
10
5
10
5
t (µs)
p
10
8
6
4
10
-5
-4
-3
-2
-1
0
1
2
3
4
10 10 10
10 10 10 10 10 10
I (Amps)
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
AVHT Series - High Temperature Automotive Grade Varistors
Protection Level
Pulse Rating Curves
Model Size 1210 - (AV 14 K 1210 401 HT ~ AV 40 K 1210 401 HT)
Model Size 1210 - (AV 14 K 1210 401 HT ~ AV 40 K 1210 401 HT)
4
10
400
5
3
10
200
100
5
1
x
2
5
1
10
0
2
4
3
5
1
0
40
30
80
1
0
1
0
1
10
6
1
0
60
5
40
17
20
14
40
20
17
30
20
0
10
5
-1
10
10
1
2
3
4
10
14
5
10
5
10
5
t (µs)
p
10
8
6
4
-5
-4
-3
-2
-1
0
1
2
3
4
10
10 10 10
10 10 10 10 10 10
I (Amps)
Model Size 1812 - (AV 14 K 1812 801 HT ~ AV 40 K 1812 801 HT)
Model Size 1812 - (AV 14 K 1812 801 HT ~ AV 40 K 1812 801 HT)
4
10
400
5
3
10
200
100
5
2
5
10
40
80
1
10
60
30
20
5
40
17
40
17
0
30
20
10
5
14
-1
10
20
1
2
3
4
10
10
5
10
5
10
5
14
t (µs)
p
10
8
6
4
-5
-4
-3
-2
-1
0
1
2
3
4
10
10 10 10
10 10 10 10 10 10
I (Amps)
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
AVHT Series - High Temperature Automotive Grade Varistors
Protection Level
Pulse Rating Curves
Model Size 2220 - (AV 14 K 2220 122 HT ~ AV 40 K 2220 122 HT)
Model Size 2220 - (AV 14 K 2220 122 HT ~ AV 40 K 2220 122 HT)
4
10
400
5
3
10
1
x
200
100
5
2
2
5
2
1
10
0
3
1
0
1
0
40
80
1
8
10
60
30
5
40
20
40
20
14
0
30
17
10
5
17
14
-1
10
20
10
1
2
3
4
10
5
10
5
10
5
t (µs)
p
10
8
6
4
-5
-4
-3
-2
-1
0
1
2
3
4
10
10 10 10
10 10 10 10 10 10
I (Amps)
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
AVHT Series - High Temperature Automotive Grade Varistors
Soldering Pad Configuration
B
C
B
0.5 0.ꢀ5
(.0ꢀ0 .0ꢁ0ꢂ
W
MM
(INCHESꢀ
DIMENSIONS:
A
A
t
L
D
Dimension
Size
L
W
t (Max.)
A (Max.)
B
C
D
2.0 0.25
(.079 .010ꢀ
1.25 0.20
(.049 .008ꢀ
1.1
(.043ꢀ
1.4
(.055ꢀ
1.2
(.047ꢀ
1.0
(.039ꢀ
3.4
(.134ꢀ
0805
1206
1210
1812
2220
3.2 0.30
(.126 .012ꢀ
1.60 0.20
(.063 .008ꢀ
1.6
(.063ꢀ
1.8
(.071ꢀ
1.2
(.047ꢀ
2.1
(.083ꢀ
4.5
(.177ꢀ
3.2 0.30
(.126 .012ꢀ
2.50 0.25
(.984 .010ꢀ
1.8
(.071ꢀ
2.8
(.110ꢀ
1.2
(.047ꢀ
2.1
(.083ꢀ
4.5
(.177ꢀ
4.7 0.40
(.185 .016ꢀ
3.20 0.30
(.126 .012ꢀ
1.9
(.075ꢀ
3.6
(.142ꢀ
1.5
(.059ꢀ
3.2
(.126ꢀ
6.2
(.244ꢀ
5.7 0.50
(.224 .020ꢀ
5.00 0.40
(.197 .016ꢀ
1.9
(.075ꢀ
5.5
(.217ꢀ
1.5
(.059ꢀ
4.2
(.165ꢀ
7.2
(.283ꢀ
Packaging Specifications
Conforms to IEC Publication 286-3 Ed. 4: 2007-06
4
0.1
0.6
(.024)
Tape
MAX.
1.75 0.1
(.069 .004)
(.157 .004)
DIA.
1.5 +0.1/-0
P
2
10 ° MAX.
(.059 +.004/-0)
COVER
TAPE
W +.ꢀ3/-.ꢀ1
(W +ꢀ.10/-ꢀ..42
E
0
2
B
.ꢀ1
(ꢀ..42
1
MAXꢀ
D
B
F
0.05
1
A
(NOTE A)
0
K
(F ꢀ..02
.
P
0.1
.004)
1
T
0
(P
1
(NOTE A)
8
12
&
20 ° MAX: W =
(.315) (.472)
12
(.472)
MM
(INCHESꢀ
10 ° MAX: W >
DIMENSIONS:
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
AVHT Series - High Temperature Automotive Grade Varistors
Packaging Specifications (Continued)
0
.ꢀꢂ
Reel
01 .ꢀꢁ
(ꢀꢁ07 ꢀ31ꢂ2
(ꢀ.79 ꢀ.0.2
W
1
10ꢀꢁ. + .ꢀꢂ
(ꢀꢂ.4 + ꢀ.0.2
A - 0ꢀ.
(A - .ꢀ792
MM
(INCHESꢀ
DIMENSIONS:
6. + 0ꢀ.
(0ꢀ360 + ꢀ.792
W
0
W
3
Model Size
1210
Model Size
1210
Dimension
Dimension
0805
1206
1812
2220
0805
1206
1812
2220
1.6
(.063ꢀ
1.9
(.075ꢀ
2.9
(.114ꢀ
3.75
(.148ꢀ
5.6
(.220ꢀ
3.5
(.138ꢀ
5.5
(.217ꢀ
A
B
F
0
0
2.4
(.094ꢀ
3.75
(.148ꢀ
3.7
(.146ꢀ
5
6.25
(.246ꢀ
8.0
(.315ꢀ
12.0
(.480ꢀ
W
(.197ꢀ
1.1
(.043ꢀ
1.8
(.071ꢀ
2
3.5
(.138ꢀ
6.5
(.256ꢀ
K
B
MAX.
MAX.
T
MAX.
2
0
1
(.079ꢀ
4.35
(.171ꢀ
8.2
(.323ꢀ
8.4 1.5
(.331 .059ꢀ
12.4
(.488 .079ꢀ
2
W
1
0.3
(.012ꢀ
1.5
(.059ꢀ
14.4
(.567ꢀ
18.4
(.724ꢀ
D
DIA. MIN.
W
MAX.
2
1
6.25
(.246ꢀ
10.25
(.404ꢀ
7.9 to 10.9
(.311 to .429ꢀ
11.9 to 15.4
(.469 to .606ꢀ
E
MIN.
W
3
2
4
8
180/330
(7.087/12.992ꢀ
P
A DIA.
1
(.157ꢀ
(.315ꢀ
Packaging Quantities
Model Size
Series
Voltage Range (V)
0805
1206
2500
2500
2500
1210
2500
2500
2500
1812
2220
1000
1000
1000
14
17
3500
3500
1000
1000
1000
AVHT
20 to 40
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
AVHT Series - High Temperature Automotive Grade Varistors
Soldering Recommendations for SMD Components
Popular soldering techniques used for surface mounted components are Wave and Infrared Reflow processes. Both processes can be
performed with Pb-containing or Pb-free solders. The terminations for these soldering techniques are NiSn Barrier Type End
Terminations.
End Termination
Designation
Recommended and Suitable for
RoHS Compliant
NiSn End Termination
AVHT Series...Ni
Pb-containing and Pb-free soldering
Yes
Wave Soldering
This process is generally associated with discrete components mounted on the underside of printed circuit boards, or for large top-side
components with bottom-side mounting tabs to be attached, such as the frames of transformers, relays, connectors, etc. SMD varistors
to be wave soldered are first glued to the circuit board, usually with an epoxy adhesive. When all components on the PCB have been
positioned and an appropriate amount of time is allowed for adhesive curing, the completed assembly is then placed on a conveyor and
run through a single, double wave process.
Infrared Reflow Soldering
These reflow processes are typically associated with top-side component placement. This technique utilizes a mixture of adhesive and
solder compounds (and sometimes fluxes) that are blended into a paste. The paste is then screened onto PCB soldering pads specifi-
cally designed to accept a particular sized SMD component. The recommended solder paste wet layer thickness is 100 to 300 µm. Once
the circuit board is fully populated with SMD components, it is placed in a reflow environment, where the paste is heated to slightly above
its eutectic temperature. When the solder paste reflows, the SMD components are attached to the solder pads.
Solder Fluxes
Solder fluxes are generally applied to populated circuit boards to keep oxides from forming during the heating process and to facilitate
the flowing of the solder. Solder fluxes can be either a part of the solder paste compound or separate materials, usually fluids.
Recommended fluxes are:
• non-activated (R) fluxes, whenever possible
• mildly activated (RMA) fluxes of class L3CN
• class ORLO
Activated (RA), water soluble or strong acidic fluxes with a chlorine content > 0.2 wt. % are NOT RECOMMENDED. The use of such
fluxes could create high leakage current paths along the body of the varistor components.
When a flux is applied prior to wave soldering, it is important to completely dry any residual flux solvents prior to the soldering process.
Thermal Shock
To avoid the possibility of generating stresses in the varistor chip due to thermal shock, a preheat stage to within 100 °C of the peak sol-
dering process temperature is recommended. Additionally, SMD varistors should not be subjected to a temperature gradient greater than
4 °C/sec., with an ideal gradient being 2 °C/sec. Peak temperatures should be controlled. Wave and Reflow soldering conditions for SMD
varistors with Pb-containing solders are shown on the next page in Fig. 1 and 2 respectively, while Wave and Reflow soldering conditions
for SMD varistors with Pb-free solders are shown in Fig. 1 and 3.
Whenever several different types of SMD components are being soldered, each having a specific soldering profile, the soldering profile
with the least heat and the minimum amount of heating time is recommended. Once soldering has been completed, it is necessary to
minimize the possibility of thermal shock by allowing the hot PCB to cool to less than 50 °C before cleaning.
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
AVHT Series - High Temperature Automotive Grade Varistors
Soldering Recommendations for SMD Components (Continued)
Inspection Criteria
When Wave or Infrared Reflow processes are used, the inspection criteria to determine acceptable solder joints will depend on several
key variables, principally termination material process profiles.
Pb-containing Wave and IR Reflow Soldering
Typical “before” and “after” soldering results for NiSn Barrier Type End Terminations can be seen in Fig. 4. NiSn Barrier Type varistors
form a reliable electrical contact and metallurgical bond between the end terminations and the solder pads. The bond between these two
metallic surfaces is exceptionally strong and has been tested by both vertical pull and lateral (horizontal) push tests. The results exceed
established industry standards for adhesion.
NiSn End Terminations
NiSn End Terminations
Fig. 5 Soldering Criteria for Wave and IR Reflow
Pb-free Soldering
Fig. 4 Soldering Criteria for Wave and IR Reflow
Pb-containing Soldering
Pb-free Wave and IR Reflow Soldering
Solder forms a metallurgical junction with the entire volume of the end termination, i.e., it diffuses from pad to end termination across the
inner side, forming a “mirror” or “negative meniscus. The height of the solder penetration can be clearly seen on the end termination and
is always 30 % higher than the chip height.
Since barrier type terminations on Bourns® chips do not require the use of sometimes problematic nickel and tin-alloy electroplating
processes, these varistors are truly considered environmentally friendly.
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
AVHT Series - High Temperature Automotive Grade Varistors
Soldering Recommendations for SMD Components (Continued)
Solder Test and Retained Samples
Reflow soldering test based on J-STD-020D.1 and soldering test by dipping based on IEC 60068- 2 for Pb-free solders are performed on
each production lot as shown in the following chart. Test results and accompanying samples are retained for a minimum of two (2) years.
The solderability of a specific lot can be checked at any time within this period, should a customer require this information.
Static Leaching (Simula-
tion of Reflow Soldering)
Dynamic Leaching (Simu-
lation of Wave Soldering)
Test
Resistance to Flux
Solderability
Soldering method
Flux
Dipping
Dipping
Dipping
Dipping with Agitation
L3CN, ORL0, R
L3CN, ORL0
L3CN, ORL0, R
L3CN, ORL0, R
Pb Solder
62Sn / 36Pb / 2Ag
235 ± 5
Pb Soldering
Temperature (°C)
235 ± 5
260 ± 5
235 ± 5
Pb-Free Solder
Sn96 / Cu0,4-0,8 / 3-4Ag
Pb-Free Soldering
Temperature (°C)
250 ± 5
2
250 ± 5
280 ± 5
250 ± 5
Soldering Time (sec.)
Burn-in Conditions
210
-
10
-
> 15
V
, 48 hours
-
dcmax
> 95 % of end termination > 95 % of end termination
dVn < 5 %, i must stay > 95 % of end termination
dc
Acceptance Criterion
must be intact and
covered by solder
must be intact and
covered by solder
unchanged
must be covered by solder
Rework Criteria - Soldering Iron
Unless absolutely necessary, the use of soldering irons is NOT recommended for reworking varistor chips. If no other means of rework is
available, the following criteria must be strictly followed:
• Do not allow the tip of the iron to directly contact the top of the chip
• Do not exceed the following soldering iron specifications:
Output Power.......................................30 Watts Maximum
Temperature of Soldering Iron Tip.......280 °C Maximum
Soldering Time.....................................10 Seconds Maximum
Storage Conditions
SMD varistors should be used within 1 year of purchase to avoid possible soldering problems caused by oxidized terminals. The storage
environment should be controlled, with humidity less than 40 % and temperature between -25 and +45 °C. Varistor chips should always
be stored in their original packaged unit.
When varistor chips have been in storage for more than 1 year, and when there is evidence of solderability difficulties, Bourns can
“refresh” the terminations to eliminate these problems.
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
AVHT Series - High Temperature Automotive Grade Varistors
Reliability - Lifetime
Pb-free Wave and IR Reflow Soldering
In general, reliability is the ability of a component to perform and maintain its functions in routine circumstances, as well as in hostile or
unexpected circumstances.
The Mean life of the AV series is a function of:
• Factor of Applied Voltage
• Ambient Temperature
Mean life is closely related to Failure rate (formula).
Mean life (ML) is the arithmetic mean (average) time to failure of a component.
Failure rate is the frequency with which an engineered system or component fails, expressed, for example, in failures per hour. Failure
rate is usually time dependent, and an intuitive corollary is that the rate changes over time versus the expected life cycle of a system.
Failure rate formula - calculation
AVHT Series
Mean Life on Arrhenius Model
9
10
Λ =
[fit]
108
107
106
ML [h]
Years
1000
FAV - Factor of Applied Voltage
V
apl
FAV =
100
V
max
105
104
10
1
V
V
.............applied voltage
apl
...........maximum operating voltage
max
120 100
80
60
40
20
T (°C)
a
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
AVHT Series - High Temperature Automotive Grade Varistors
Reliability Testing Procedures
Varistor test procedures comply with CECC 42200, IEC 1051-1/2 and AEC-Q200. Test results are available upon customer request.
Special tests can be performed upon customer request.
Condition to be
Reliability Parameter
Test
Tested According to
CECC 42200, Test 4.20 or
Satisfied after
Testing
AC/DC Bias Reliability
AC/DC Life Test
IEC 1051-1, Test 4.20,
AEC-Q200 Test 8 - 1000 h at UCT
|δV (1 mA)| < 10 %
n
CECC 42200, Test C 2.1 or
IEC 1051-1, Test 4.5
10 pulses in the same direction at
2 pulses per minute at maximum peak current for 10 pulses
|δV (1 mA)| < 10 %
no visible damage
n
Pulse Current Capability
I
8/20 µs
max
CECC 42200, Test C 2.1 or
IEC 1051-1, Test 4.5
10 pulses in the same direction at
1 pulse every 2 minutes at maximum peak current for 10
pulses
|δV (1 mA)| < 10 %
no visible damage
n
Pulse Energy Capability
WLD Capability
W
10/1000 µs
max
|δV (1 mA)| < 15 %
n
WLD x 10
5 min.
ISO 7637, Test pulse 5, 10 pulses at rate of 1 per minute
no visible damage
|δV (1 mA)| < 15 %
n
V
Capability
V
Increase of supply voltage to V ≥ V
for 1 minute
jump
jump
jump
no visible damage
CECC 42200, Test 4.16 or
IEC 1051-1, Test 4.17
a) Dry heat, 16h, UCT, Test Ba, IEC 68-2-2
b) Damp heat, cyclic, the first cycle: 55 °C, 93 % RH, 24 h,
Test Db 68-2-4
c) Cold, LCT, 2 h, Test Aa, IEC 68-2-1
d) Damp heat cyclic, remaining 5 cycles: 55 °C, 93 % RH,
24 h/cycle, Test Bd, IEC 68-2-30
Climatic Sequence
Thermal Shock
|δV (1 mA)| < 10 %
n
Environmental and
Storage Reliability
CECC 42200, Test 4.12, Test Na, IEC 68-2-14,
AEC-Q200 Test 16, 5
|δV (1 mA)| < 10 %
n
no visible damage
CECC 42200, Test 4.17, Test Ca, IEC 68-2-3,
AEC-Q200 Test 6, 56 days, 40 °C, 93 % RH,
AEC-Q200 Test 7: Bias, Rh, T all at 85.
Steady State
Damp Heat
|δV (1 mA)| < 10 %
n
IEC 68-2-2, Test Ba, AEC-Q200 Test 3, 1000 h at maximum
storage temperature
Storage Test
|δV (1 mA)| < 5 %
n
Continued on Next Page
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
AVHT Series - High Temperature Automotive Grade Varistors
Reliability Testing Procedures (Continued)
Condition to be
Satisfied after
Testing
Reliability Parameter
Test
Tested According to
Solderable at
shipment and after
2 years of storage,
criteria: >95% must
be covered by solder
for reflow meniscus
CECC 42200, Test 4.10.1, Test Ta, IEC 68-2-20 solder bath
and reflow method
Solderability
Resistance to
Soldering Heat
CECC 42200, Test 4.10.2, Test Tb, IEC 68-2-20 solder bath
nad reflow method
|δV (1 mA)| < 5 %
n
JIS-C-6429, App. 1, 18N for 60 sec. - same for AEC-Q200
Test 22
Terminal Strength
Board Flex
No visual damage
JIS-C-6429, App. 2, 2 mm min.
AEC-Q200 test 21 - Board flex: 2 mm flex min.
|δV (1 mA)| < 2 %
n
Mechanical Reliability
No visible damage
CECC 42200, Test 4.15, Test Fc, IEC 68-2-6,
AEC-Q200 Test 14
Frequency range 10 to 55 Hz (AEC: 10-2000 Hz)
|δV (1 mA)| < 2 %
n
Vibration
2
2
Amplitude 0.75 m/s or 98 m/s (AEC: 5 g for 20 minutes) To- No visible damage
tal duration 6 h (3x2 h) (AEC: 12 cycles each of 3 directions)
Waveshape - half sine
CECC 42200, Test 4.14, Test Ea, IEC 68-2-27, AEC-Q200
Test 13.
Mechanical Shock Acceleration = 490 m/s (AEC: MIL-STD-202-Method 213),
Pulse duration = 11 ms,
|δV (1 mA)| < 10 %
No visible damage
n
2
Waveshape - half sine; Number of shocks = 3x6
Electrical Transient
Conduction
AEC-Q200 Test 30: Test pulses 1 to 3.
ISO-7637-1 Pulses
|δV (1 mA)| < 10 %
No visible damage
n
Also other pulses - freestyle.
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
AVHT Series - High Temperature Automotive Grade Varistors
Terminology
Term
Symbol
Definition
Rated AC Voltage.........................V
..................Maximum continuous sinusoidal AC voltage (<5 % total harmonic distortion) which may be
applied to the component under continuous operation conditions at +25 °C
rms
Rated DC Voltage.........................V ....................Maximum continuous DC voltage (<5 % ripple) which may be applied to the component
dc
under continuous operating conditions at +25 °C
Supply Voltage..............................V........................The voltage by which the system is designated and to which certain operating
characteristics of the system are referred; V
= 1.1 x V
rms
Leakage Current...........................I ......................The current passing through the varistor at V and at +25 °C or at any other specified
dc
dc
temperature
Varistor Voltage ............................V ......................Voltage across the varistor measured at a given reference current (I )
n
n
Reference Current........................I .......................Reference current = 1 mA DC
n
Clamping Voltage .........................V ......................The peak voltage developed across the varistor under standard atmospheric conditions,
c
Protection Level
when passing an 8/20 µs class current pulse
Class Current................................I ........................A peak value of current which is 1/10 of the maximum peak current for 100 pulses at two
c
per minute for the 8/20 µs pulse
Voltage Clamping Ratio................V /V
.............A figure of merit measure of the varistor clamping effectiveness as defined by the symbols
c
app
V /V , where (V
= V
or V )
c
app
app
rms dc
Jump Start Transient ....................V
.................The jump start transient results from the temporary application of an overvoltage in excess
of the rated battery voltage. The circuit power supply may be subjected to a temporary
overvoltage condition due to the voltage regulation failing or it may be deliberately generated
when it becomes necessary to boost start the car.
jump
Rated Single Pulse.......................W
Transient Energy
.................Energy which may be dissipated for a single 10/1000 µs pulse of a maximum rated
current, with rated AC voltage or rated DC voltage also applied, without causing device
failure
max
Load Dump Transient...................WLD..................Load Dump is a transient which occurs in automotive environments. It is an exponentially
decaying positive voltage which occurs in the event of a battery disconnect while the alter-
nator is still generating charging current with other loads remaining on the alternator circuit
at the time of battery disconnect.
Rated Peak Single Pulse..............I
Transient Current
...................Maximum peak current which may be applied for a single 8/20 µs pulse, with rated line
voltage also applied, without causing device failure
max
Rated Transient Average..............P........................Maximum average power which may be dissipated due to a group of pulses occurring
Power Dissipation within a specified isolated time period, without causing device failure at 25 °C
Capacitance..................................C........................Capacitance between two terminals of the varistor measured @ 1 kHz
Non-linearity Exponent.................α........................A measure of varistor nonlinearity between two given operating currents, I and I as
n
1
described by I = k V exp(a), where:
- k is a device constant,
- I < I < I and
1
n
- a log (I /I )/log(V /V ) = 1/log (V /V ), where:
1 n
1
n
1
n
n
- I is reference current (1 mA) and V is varistor voltage
r
- I = 10 I , V is the voltage measured at I
1
n
1
1
Response Time.............................tr........................The time lag between application of a surge and varistor’s “turn-on” conduction action
Varistor Voltage Temperature .......TC .....................(V @ 85 °C - V @ 25 °C) / (V @ 25 °C) x 60 °C) x 100
n
n
n
Coefficient
Insulation Resistance ...................IR.......................Minimum resistance between shorted terminals and varistor surface
Isolation Voltage......................................................The maximum peak voltage which may be applied under continuous operating conditions
between the varistor terminations and any conducting mounting surface
Operating Temperature..............................................The range of ambient temperature for which the varistor is designed to operate continuously
as defined by the temperature limits of its climatic category
Climatic Category .........................LCT/UCT/DHD..LCT & UCT = Lower and Upper Category Temperature - the minimum and maximum
ambient temperatures for which a varistor has been designed to operate continuously.
DHD = Dump Heat Test Duration
Storage Temperature...............................................Storage temperature range without voltage applied
Current/Energy Derating..........................................Derating of maximum values when operated above UCT
REV. A 01/20
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
Legal Disclaimer Notice
This legal disclaimer applies to purchasers and users of Bourns® products manufactured by or on behalf of Bourns, Inc. and its
affiliates (collectively, “Bourns”).
Unless otherwise expressly indicated in writing, Bourns® products and data sheets relating thereto are subject to change
without notice. Users should check for and obtain the latest relevant information and verify that such information is current and
complete before placing orders for Bourns® products.
The characteristics and parameters of a Bourns® product set forth in its data sheet are based on laboratory conditions, and
statements regarding the suitability of products for certain types of applications are based on Bourns’ knowledge of typical
requirements in generic applications. The characteristics and parameters of a Bourns® product in a user application may vary
from the data sheet characteristics and parameters due to (i) the combination of the Bourns® product with other components
in the user’s application, or (ii) the environment of the user application itself. The characteristics and parameters of a Bourns®
product also can and do vary in different applications and actual performance may vary over time. Users should always verify
the actual performance of the Bourns® product in their specific devices and applications, and make their own independent
judgments regarding the amount of additional test margin to design into their device or application to compensate for
differences between laboratory and real world conditions.
Unless Bourns has explicitly designated an individual Bourns® product as meeting the requirements of a particular industry
standard (e.g., ISO/TS 16949) or a particular qualification (e.g., UL listed or recognized), Bourns is not responsible for any
failure of an individual Bourns® product to meet the requirements of such industry standard or particular qualification. Users of
Bourns® products are responsible for ensuring compliance with safety-related requirements and standards applicable to their
devices or applications.
Bourns® products are not recommended, authorized or intended for use in nuclear, lifesaving, life-critical or life-sustaining ap-
plications, nor in any other applications where failure or malfunction may result in personal injury, death, or severe property or
environmental damage. Unless expressly and specifically approved in writing by two authorized Bourns representatives on a
case-by-case basis, use of any Bourns® products in such unauthorized applications might not be safe and thus is at the user’s
sole risk. Life-critical applications include devices identified by the U.S. Food and Drug Administration as Class III devices and
generally equivalent classifications outside of the United States.
Bourns expressly identifies those Bourns® standard products that are suitable for use in automotive applications on such
products’ data sheets in the section entitled “Applications.” Unless expressly and specifically approved in writing by two
authorized Bourns representatives on a case-by-case basis, use of any other Bourns® standard products in an automotive
application might not be safe and thus is not recommended, authorized or intended and is at the user’s sole risk. If Bourns
expressly identifies a sub-category of automotive application in the data sheet for its standard products (such as infotainment
or lighting), such identification means that Bourns has reviewed its standard product and has determined that if such Bourns®
standard product is considered for potential use in automotive applications, it should only be used in such sub-category of
automotive applications. Any reference to Bourns® standard product in the data sheet as compliant with the AEC-Q standard
or “automotive grade” does not by itself mean that Bourns has approved such product for use in an automotive application.
Bourns® standard products are not tested to comply with United States Federal Aviation Administration standards generally
or any other generally equivalent governmental organization standard applicable to products designed or manufactured for
use in aircraft or space applications. Bourns expressly identifies Bourns® standard products that are suitable for use in aircraft
or space applications on such products’ data sheets in the section entitled “Applications.” Unless expressly and specifically
approved in writing by two authorized Bourns representatives on a case-by-case basis, use of any other Bourns® standard
product in an aircraft or space application might not be safe and thus is not recommended, authorized or intended and is at the
user’s sole risk.
The use and level of testing applicable to Bourns® custom products shall be negotiated on a case-by-case basis by Bourns and
the user for which such Bourns® custom products are specially designed. Absent a written agreement between Bourns and the
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to such Bourns® custom products.
Users shall not sell, transfer, export or re-export any Bourns® products or technology for use in activities which involve the
design, development, production, use or stockpiling of nuclear, chemical or biological weapons or missiles, nor shall they use
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Web Page: http://www.bourns.com/legal/disclaimers-terms-and-policies
PDF: http://www.bourns.com/docs/Legal/disclaimer.pdf
C1753 05/17/18R
AV14K1812801HT 相关器件
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| AV14K2220122HT | BOURNS | High Temperature Automotive Grade Varistors | 获取价格 |
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| AV150KE | OHMITE | 2W CERAMIC COMP PULSEATERS | 获取价格 |
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| AV155-AM6TFN | ETC | ROD HANGER THREADED | 获取价格 |
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| AV155-AM8TFN | ETC | ROD HANGER THREADED | 获取价格 |
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| AV15653F | PANASONIC | Snap Acting/Limit Switch, SPDT, Vertical, Screw Terminal, Pushbutton Actuator, Panel Mount, | 获取价格 |
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| AV16070003 | ETC | CRYSTAL 16MHZ 10PF SMD | 获取价格 |
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