SR20W472-FQL [WALSIN]
Sulfuration resistant ASTM B-809-95 compliant;型号: | SR20W472-FQL |
厂家: | Walsin Technology |
描述: | Sulfuration resistant ASTM B-809-95 compliant |
文件: | 总8页 (文件大小:485K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
Approval sheet
SR20X, SR25X
±1%, ±5%
Power chip resistors
Size 2010, 2512
( Automotive & Anti-sulfuration )
Page 1 of 8
SR20-25X_V04
Jan - 2013
Approval sheet
FEATURE
1. High reliability and stability ±1%
2. Sulfuration resistant ASTM B-809-95 compliant
3. Automotive grade AEC Q-200 Compliant
4. Higher component and equipment reliability
5. RoHS compliant Lead free products
APPLICATION
•
•
•
•
•
Power supply
Industry
Motor control
M/B Computer
Automotives
•
Server
DESCRIPTION
The resistors are constructed in a high grade ceramic body (aluminum oxide). Internal metal electrodes are
added at each end and connected by a resistive paste that is applied to the top surface of the substrate. The
extra protective metal film is added onto top side electrodes to protect termination from sulfuration. The
composition of the paste is adjusted to give the approximate resistance required and the value is trimmed to
within tolerance by laser cutting of this resistive layer.
The resistive layer is covered with a protective coat. Finally, the two external end terminations are added. For
ease of soldering the outer layer of these end terminations is a Tin (lead free) alloy.
Fig 1. Construction of 2512, 2010 Chip-R
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SR20-25X_V04
Jan - 2013
Approval sheet
QUICK REFERENCE DATA
Item
Series No.
General Specification
SR20
2010 ( 5025 ),
SR25
Size code
2512(6432)
Resistance Tolerance
Resistance Range
±5% (E24); ±1% (E24+E96)
1Ω ~ 10MΩ, Jumper (0Ω)
± 200 ppm/°C
TCR (ppm/°C)
< 10Ω
10Ω ~ 1MΩ
> 1MΩ
± 100 ppm/°C
± 200 ppm/°C
0.5 W
1W
Max. dissipation at Tamb=70°C
Max. Operation Voltage (DC or RMS)
Max. Overload Voltage (DC or RMS)
Operation temperature
200V
400V
250V
500V
-55 ~ +155’C
Test conditions for jumper ( 0 ohm )
Type
SR20X
1/2 W
SR25X
Power Rating At 70C
Resistance
1 W
Max. 50mR
4.5 A
Max. 50mR
3.2 A
Rated Current
Peak Current
8 A
11 A
Operating Temperature
-55C ~ 155C
-55C ~ 155C
Note :
1.
This is the maximum voltage that may be continuously supplied to the resistor element, see “IEC publication
60115-8”
2.
Max. Operation Voltage : So called RCWV (Rated Continuous Working Voltage) is determined by
RCWV = RatedPower ×Resistance Value or Max. RCWV listed above, whichever is lower.
MECHANICAL DATA (unit : mm)
TYPE
L
SR20
SR25
5.00±0.20
2.50±0.20
0.55±0.10
0.65±0.25
0.60±0.25
6.40±0.20
3.20±0.20
0.60±0.10
0.65±0.25
0.90±0.25
W
T
Tt
Tb
Page 3 of 8
SR20-25X_V04
Jan - 2013
Approval sheet
MARKING
Each resistor is marked with a four-digit code on the protective coating to designate the nominal resistance
value
±5%,
±1% tolerance !
Size
±5%
±1%
2512, 2010
4-digits marking
4-digits marking
FUNCTIONAL DESCRIPTION
Product characterization
Standard values of nominal resistance are taken from the E96 & E24 series for resistors with a tolerance of ±5%
& ±1%. The values of the E24/E96 series are in accordance with “IEC publication 60063”.
Derating curve
The power that the resistor can dissipate depends on the operating temperature; see Fig.2
SOLDERING CONDITION
The robust construction of chip resistors allows them to be completely immersed in a solder bath of 260°C for 10
seconds. Therefore, it is possible to mount Surface Mount Resistors on one side of a PCB and other discrete
components on the reverse (mixed PCBs).
Surface Mount Resistors are tested for solderability at 235°C during 2 seconds. The test condition for no
leaching is 260°C for 30 seconds. Typical examples of soldering processes that provide reliable joints without
any damage are given in Fig 3.
Page 4 of 8
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Approval sheet
Fig 3. Infrared soldering profile for Chip Resistors
CATALOGUE NUMBERS
The resistors have a catalogue number starting with .
SR25
X
472_
J
T
L
Size code
Type code
X :
Resistance code
Tolerance
F : ±1%
Packaging code
Termination
code
SR25 : 2512
SR20 : 2010
E24: 2 significant digits
followed by no. of
zeros
T
: 7” Reeled taping
: 10” Reeled taping
: 13” Reeled taping
: Bulk
L
= Sn base
Q
G
B
±5%: 1Ω - 10MΩ
±1%: 10Ω - 1MΩ
W :
J : ±5%
(lead free)
P : Jumper
100Ω = 101_
10KΩ = 103
±1%: <10Ω; > 1MΩ
E96 : 3 significant digits
followed by no. of
zeros
102Ω
=1020
=3742
37.4KΩ
* Anti-Sulfuration test conditions: ASTM B-809-95 60’C, 480hrs! Acceptance criteria +/-1%!
* 100% CCD visual inspection to guarantee visual quality.
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Approval sheet
TEST AND REQUIREMENTS ( AEC Q-200 )
REQUIREMENT
Resistor
TEST
PROCEDURE / TEST METHOD
0Ω
Within the specified tolerance N/A
Refer to “QUICK REFERENCE
DATA”
Electrical
-
-
DC resistance values measurement
Characteristics
Temperature Coefficient of Resistance (T.C.R)
Natural resistance change per change in degree
centigrade.
JISC5201-1: 1998
R2 − R
Clause 4.8
×106 (ppm/°C) t1 : 20°C+5°C-1°C
1
R
(
t2 − t1
)
1
R1 : Resistance at reference temperature
R2 : Resistance at test temperature
Un-mounted chips completely immersed for
Resistance to
∆R/R max. ±(0.5%+0.05Ω)
10±1second in a SAC solder bath at 270℃±5ºC
soldering heat(R.S.H)
<50mΩ
no visible damage
MIL-STD-202
method 210
a) Bake the sample for 155℃ dwell time 4hrs/ solder
dipping 235℃/ 5sec.
Solderability
J-STD-002
95% coverage min., good tinning and no
visible damage
b) Steam the sample dwell time 8 hour/ solder
dipping 215℃/ 5sec.
c) Steam the sample dwell time 8 hour/ solder
dipping 260℃/ 7sec.
∆R/R max. ±(0.5%+0.05Ω)
<50mΩ
<50mΩ
<50mΩ
1000 cycles, -55℃ ~ +155℃, dwell time 30min
Temperature cycling
JESD22
no visible damage
maximum.
Method JA-104
∆R/R max. ±(0.5%+0.05Ω)
No visible damage
Moisture Resistance
MIL-STD-202
65±2°C, 80~100% RH, 10 cycles, 24 hours/ cycle
method 106
1000+48/-0 hours; 85°C, 85% RH, 10% of operation ∆R/R max. ±(1.0%+0.05Ω)
Bias Humidity
MIL-STD-202
method 103
Operational Life
MIL-STD-202
method 108
High Temperature
Exposure
power
No visible damage
1000+48/-0 hours; 35% of
operation power,
∆R/R max. ±(1.0%+0.05Ω)
125±2°C
<50mΩ
<50mΩ
No visible damage
1000+48/-0 hours; without load in a temperature ∆R/R max. ±(1%+0.05Ω)
chamber controlled 155±3°C No visible damage
MIL-STD-202
Method 108
Board Flex
Resistors mounted on a 90mm glass epoxy resin ∆R/R max. ±(1.0%+0.05Ω)
<50mΩ
AEC-Q200-005
Terminal strength
AEC-Q200-006
Thermal shock
MIL-STD-202
method 107
ESD
PCB(FR4),bending once 2mm for 60sec.
No visible damage
Pressurizing force: 1.8Kg, Test time: 60±1sec.
No remarkable damage or removal of the
terminations
Test –55 to 155℃/ dwell time 15min/ Max transfer ∆R/R max. ±(0.5%+0.05Ω)
<50mΩ
time 20sec 300cycles
No visible damage
Test contact 3KV.
∆R/R max. ±(1.0%+0.05Ω)
<50mΩ
AEC-Q200-002
No visible damage
Page 6 of 8
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Jan - 2013
Approval sheet
Test ½ Sine Pulse, Peak value: 100g, normal
duration: 6ms, Velocity change:12.3ft/sec. Three
shocks in each direction, total 18 shocks.
Mechanical Shock
MIL-STD-202
method 213
Vibration
Within product specification
<50mΩ
<50mΩ
tolerance and no visible damage.
Test 5g’s for 20 min., 12 cycles each of 3
orientations.
△R/R max. ±(1%+0.05Ω) and
MIL-STD-202
method 204
no visible damage.
Solvent is Isopropyl alcohol, immersion 3mins at 25 No superficial defect on marking, <50mΩ
℃ and brush 10 strokes with a toothbrush with a
Resistance to
Solvents : MIL-STD-
202
encapsulation, coating,
handle made of a non-reactive material (wet bristle), appearance. Electrical
immersion and brush 3 times and then air blow dry. characteristics within products
specification and tolerance.
Method 215
Inspect at 3X max. for marking,
inspect at 10X for part damage.
Electrical test not required. Inspect device
construction, marking and workmanship
External Visual
MIL-STD-883
method 2009
Physical Dimension
JESD22
No visual damage and refer WTC marking
code.
Verify physical dimensions(L, W, T, Tb, Tt)
Within the specified tolerance for WTC.
method JB-100
Page 7 of 8
SR20-25X_V04
Jan - 2013
Approval sheet
PACKAGING
Plastic Tape specifications (unit :mm)
Type
SR25
SR20
A
B
W
F
E
6.90±0.20
5.50±0.20
3.60±0.20
2.80±0.20
12.00±0.30
5.50±0.10
1.75±0.10
Type
SR25
SR20
P1
P0
T
ΦD
+0.1
4.00±0.10
4.00±0.10
MAX1.2
Φ1.50
−0.0
Reel dimensions
Symbol
(unit : mm)
A
B
C
D
13.0±0.2
14.0±0.2
Φ178.0±2.0
Φ60.0±1.0
Taping quantity
SR20, SR25 by plastic tape taping 4,000 pcs per reel.
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SR20-25X_V04
Jan - 2013
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