WR12 [ETC]
Thick Film General Purpose Chip Resistors;
| 型号： | WR12 |
| 厂家： | 
ETC |
| 描述： | Thick Film General Purpose Chip Resistors |
| 文件： | 总9页 (文件大小：259K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Approval sheet
WR12, WR08, WR06, WR04
±1%, ±5%
Thick Film General Purpose Chip Resistors
Size 1206, 0805, 0603, 0402
*Contents in this sheet are subject to change without prior notice.
Page 1 of 9
ASC_WR_V21
Mar.- 2012
Approval sheet
FEATURE
1. High reliability and stability
2. Reduced size of final equipment
3. Lower assembly costs
4. Higher component and equipment reliability
5. RoHS compliant and Lead free products
APPLICATION
•
•
•
Consumer electrical equipment
EDP, Computer application
Telecom application
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
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 Chip-R
Page 2 of 9
ASC_WR_V21
Mar.- 2012
Approval sheet
QUICK REFERENCE DATA
Item
General Specification
Series No.
Size code
WR12
WR08
0805(2012)
WR06
WR04
1206(3216)
0603(1608)
0402(1005)
Resistance Range
1Ω~10MΩ (±5% tolerance), Jumper
1Ω~10MΩ (±1% tolerance),
Resistance Tolerance
±1%
E96/E24
±5%
±1%
±5%
±1%
±5%
±1%
E96/E24
±5%
E24
E96/E24
E24
E96/E24
E24
E24
TCR (ppm/°C)
10MΩ ≥R＞10Ω
≤ ± 100
-200~+400
R≤10Ω
Max. dissipation
@ Tamb=70°C
1/4 W
1/8 W
1/10 W
50V
1/16 W
Max. Operation
Voltage (DC or RMS)
200V
400V
150V
300V
50V
Max. Overload
Voltage (DC or RMS)
100V
100V
Climatic category
Note :
55/155/56
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
or Max. RCWV listed above, whichever is lower.
RCWV = RatedPower×ResistanceValue
The resistance of Jumper is defined <0.05Ω.
3.
DIMENSIONS (unit : mm)
WR12
WR08
WR06
WR04
L
W
T
3.10 ± 0.10
1.60 ± 0.10
0.60 ± 0.15
0.45 ± 0.20
0.50 ± 0.20
2.00 ± 0.10
1.25 ± 0.10
0.50 ± 0.15
0.40 ± 0.20
0.40 ± 0.20
1.60 ± 0.10
0.80 ± 0.10
0.45 ± 0.15
0.30 ± 0.15
0.30 ± 0.10
1.00 ± 0.05
0.50 ± 0.05
0.35 ± 0.05
0.25 ± 0.10
0.20 ± 0.10
Tb
Tt
Page 3 of 9
ASC_WR_V21
Mar.- 2012
Approval sheet
MARKING
Size \ Nr. Of digit of code\tolerance
±5%
±1%
1206 (3216)
3-digits marking
3-digits marking
3-digits marking
4-digits marking
0805 (2012)
4-digits marking
3-digits marking
0603 (1608)
N0 MARKING
0402(1005)
3-digits marking（±5% : 1206 & 0805 & 0603 ）
Each resistor is marked with a three digits code on the protective coating to designate the nominal resistance value.
3-digits marking（±1% : 0603）
Nominal resistance
1.E-24 series
Description
As 0603 WR06X ±5%.
2.E-96 series
The 1st two digit codes are referring to the CODE on the table, the 3rd code is the index of resistance
value :
Y=10-2，X=10-1，A=100，B=101，C=102，D=103，E=104，F=105
EX :
17.8Ω=25X，178Ω=25A，1K78 =25B
17K8=25C， 178K=25D， 1M78=25E
3. Remark
There is no marking for the items are not under E-24 and E-96 series
CODE R_value CODE R_value CODE R_Value CODE R_value CODE R_value CODE R_value CODE R_value CODE R_value
01
02
03
04
05
06
07
08
09
10
11
12
100
102
105
107
110
113
115
118
121
124
127
130
13
14
15
16
17
18
19
20
21
22
23
24
133
137
140
143
147
150
154
158
162
165
169
174
25
26
27
28
29
30
31
32
33
34
35
36
178
182
187
191
196
200
205
210
215
221
226
232
37
38
39
40
41
42
43
44
45
46
47
48
237
243
249
255
261
267
274
280
287
294
301
309
49
50
51
52
53
54
55
56
57
58
59
60
316
324
332
340
348
357
365
374
383
392
402
412
61
62
63
64
65
66
67
68
69
70
71
72
422
432
442
453
464
475
487
499
511
523
536
549
73
74
75
76
77
78
79
80
81
82
83
84
562
576
590
604
619
634
649
665
681
698
715
732
85
86
87
88
89
90
91
92
93
94
95
96
750
768
787
806
825
845
866
887
909
931
953
976
4-digits marking（±1% : 1206/0805
）
Each resistor is marked with a four digits code on the protective coating to designate the nominal resistance value.
Example
RESISTANCE
10Ω
12Ω
100Ω
6800Ω
47000Ω
100
120
101
682
473
3-digits marking（1206 & 0805 & 0603 ±5% ）
4-digits marking
10R0
12R0
1000
6801
4702
Page 4 of 9
ASC_WR_V21
Mar.- 2012
Approval sheet
FUNCTIONAL DESCRIPTION
Product characterization
Standard values of nominal resistance are taken from the E24 series for resistors with a tolerance of ±5%,
and E96 series for resistors with a tolerance of ±1%. The values of the E24/E96 series are in accordance with
“IEC publication 60063”
Derating
The power that the resistor can dissipate depends on the operating temperature; see Fig.2
Figure 2
Maximum dissipation in percentage of rated power as a
function of the ambient temperature for WR12, WR08,
WR06, WR04
MOUNTING
Due to their rectangular shapes and small tolerances, Surface Mountable Resistors are suitable for handling by
automatic placement systems.
Chip placement can be on ceramic substrates and printed-circuit boards (PCBs).
Electrical connection to the circuit is by individual soldering condition.
The end terminations guarantee a reliable contact.
Page 5 of 9
ASC_WR_V21
Mar.- 2012
Approval sheet
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.
Fig 3. Infrared soldering profile for Chip Resistors
CATALOGUE NUMBERS
The resistors have a catalogue number starting with
WR12
X
472_
J
T
L
Size code
Type code
X :
Resistance code
Tolerance
F : ±1%
Packaging code
Termination code
WR12 : 1206
WR08 : 0805
WR06 : 0603
WR04: 0402
T
: 7” Reeled taping
: 10” Reeled taping
: 13” Reeled taping
: 13'' reel 50Kpcs
L= Sn base
(lead free)
±5%, E24: 2 significant
digits followed by no. of
zeros and a blank
Q
G
H
±5%, 1Ω ~ 10MΩ
±1%, 10Ω ~ 1MΩ
W :
J : ±5%
P : Jumper
4.7Ω
=4R7_
=100_
=221_
=000_
10Ω
only for 0402
±1%, < 10Ω; >1MΩ
220Ω
Jumper
B
: Bulk
D
: 7'' reel 20Kpcs
only for 0402
(“_” means a blank)
A : 7" reel 15Kpcs only
for 0402
±1%, E24+E96: 3 significant
digits followed by no. of
zeros
102Ω
=1020
=3742
37.4KΩ
WR12, WR08, WR06:
1. Reeled tape packaging : 8mm width paper taping 5000pcs per 7” reel, 10kpcs per 10” reel, 20kpcs per 13” reel.
2. Bulk packaging : 5000pcs per poly-bag
WR04:
1. Reeled tape packaging : 8mm width paper taping 10,000pcs per reel,
2. Bulk packaging
: 10,000pcs per poly-bag
Page 6 of 9
ASC_WR_V21
Mar.- 2012
Approval sheet
TEST AND REQUIREMENTS
Essentially all tests are carried out according to the schedule of IEC publication 115-8, category
LCT/UCT/56(rated temperature range : Lower Category Temperature, Upper Category Temperature; damp
heat, long term, 56 days). The testing also meets the requirements specified by EIA, EIAJ and JIS.
The tests are carried out in accordance with IEC publication 68, "Recommended basic climatic and mechanical
robustness testing procedure for electronic components" and under standard atmospheric conditions according
to IEC 60068-1, subclause 5.3. Unless otherwise specified, the following value supplied :
Temperature: 15°C to 35°C.
Relative humidity: 45% to 75%.
Air pressure: 86kPa to 106 kPa (860 mbar to 1060 mbar).
All soldering tests are performed with midly activated flux.
REQUIREMENT
TEST
Electrical
PROCEDURE / TEST METHOD
Resistor
Within the specified tolerance
Refer to “QUICK REFERENCE
DATA”
0Ω
-
-
DC resistance values measurement
Temperature Coefficient of Resistance (T.C.R)
Characteristics
Natural resistance change per change in degree centigrade.
JISC5201-1: 1998
Clause 4.8
<50mΩ
R2 − R
×106 (ppm/°C) t1 : 20°C+5°C-1°C
1
R
(
t2 − t1
)
1
R1 : Resistance at reference temperature (20°C+5°C/-1 °C)
R2 : Resistance at test temperature (-55°C or +155°C)
Resistance to
Un-mounted chips completely immersed for 10±1second in a SAC
solder bath at 260℃±5ºC
±5%:∆R/Rmax.±(1%+0.05Ω)
±1%:∆R/Rmax.±(0.5%+0.05Ω)
no visible damage
soldering heat(R.S.H)
JISC5201-1:1998
Clause 4.18
<50mΩ
Un-mounted chips completely immersed for 2±0.5 second in a SAC
solder bath at 235℃±5℃
Solderability
95% coverage min., good tinning and no
visible damage
JISC5201-1: 1998
Clause 4.17
±5%: ∆R/R max. ±(1%+0.05Ω)
30 minutes at -55°C±3°C, 2~3 minutes at 20°C+5°C-1°C, 30 minutes at
+155°C±3°C, 2~3 minutes at 20°C+5°C-1°C, total 5 continuous cycles
Temperature cycling
JISC5201-1: 1998
Clause 4.19
<50mΩ
±1%:∆R/Rmax.±(0.5%+0.05Ω)
No visible damage
High Temperature
Exposure
1000+48/-0 hours; without load in a temperature chamber
±5%:∆R/Rmax.±(2%+0.1Ω)
±1%:∆R/Rmax.±(1%+0.1Ω)
No visible damage
controlled 155±3°C
<50mΩ
<50mΩ
MIL-STD-202
method 108
Bending strength
JISC5201-1: 1998
Clause 4.33
Resistors mounted on a 90mm glass epoxy resin PCB(FR4), bending ±5%:∆R/Rmax.±(1%+0.05Ω)
once 3mm for 10sec, 5mm for WR04
±1%:∆R/Rmax.±(1%+0.05Ω)
No visual damaged
Adhesion
Pressurizing force: 5N, Test time: 10±1sec.
No remarkable damage or removal of the
terminations
JISC5201-1: 1998
Clause 4.32
2.5 times RCWV or max. overload voltage, for 5seconds
Short Time Overload
(STOL)
±5%: ∆R/R max. ±(2%+0.05Ω)
±1%: ∆R/R max. ±(1%+0.05Ω)
<50mΩ
JISC5201-1: 1998
Clause 4.13
No visible damage
Page 7 of 9
ASC_WR_V21
Mar.- 2012
Approval sheet
TEST
REQUIREMENT
Resistor
PROCEDURE / TEST METHOD
0Ω
1000 +48/-0 hours, loaded with RCWV or Vmax in humidity chamber
controller at 40°C±2°C and 90~95% relative humidity, 1.5hours on and
0.5 hours off
Load life in Humidity
JISC5201-1: 1998
Clause 4.24
±5%: ∆R/R max. ±(2%+0.1Ω)
±1%: ∆R/R max. ±(1%+0.1Ω)
No visible damage
<50mΩ
1000 +48/-0 hours, loaded with RCWV or Vmax in chamber controller
70±2ºC, 1.5 hours on and 0.5 hours off
Load life (endurance)
JISC5201-1: 1998
Clause 4.25
±5%: ∆R/R max. ±(3%+0.1Ω)
±1%: ∆R/R max. ±(1%+0.1Ω)
<50mΩ
No visible damage
Insulation Resistance Apply the maximum overload voltage (DC) for 1minute
R≧10GΩ
JISC5201-1: 1998
Clause 4.6
Dielectric Withstand
Voltage
Apply the maximum overload voltage (AC) for 1 minute
No breakdown or flashover
JISC5201-1: 1998
Clause 4.7
TEST CONDITION FOR JUMPER (0 Ω)
Item
WR12
WR08
1/8W
WR06
1/10W
WR04
1/16W
1/4W
Power Rating At 70°C
Resistance
MAX.50mΩ
Rated Current
2A
5A
1.5A
3.5A
1A
3A
1A
2A
Peak Current
Operating Temperature
-55 ~ +155°C
Page 8 of 9
ASC_WR_V21
Mar.- 2012
Approval sheet
PACKAGING
Paper Tape specifications (unit :mm)
Series No.
WR12
A
B
W
F
E
3.60±0.20
2.40±0.20
1.90±0.20
1.20±0.10
2.00±0.20
1.65±0.20
1.10±0.20
0.70±0.10
WR08
8.00±0.30
3.50±0.20
1.75±0.10
WR06
WR04
Series No.
WR12 / WR08
WR06
P1
P0
T
ΦD
Max. 1.0
0.65±0.05
0.40±0.05
4.00±0.10
2.00±0.10
+0.1
4.00±0.10
Φ1.50
−0.0
WR04
7” Reel dimensions
Symbol
(unit : mm)
A
B
C
D
13.0±0.2
9.0±0.5
Φ178.0±2.0
Φ60.0±1.0
Page 9 of 9
ASC_WR_V21
Mar.- 2012
相关型号：
©2020 ICPDF网 联系我们和版权申明