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Walsin Technology Corporation
WR12, WR08, WR06, WR04 ±1%, ±5% General purpose chip resistors Size 1206, 0805, 0603, 0402 (Special Requirement)
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Customer : Approval No : Issue Date : Customer Approval :
Page 1 of 10
WR12/WR08/WR06/WR04
Version 1
Feb.-2008
datasheet pdf - http://www.DataSheet4U.net/
Walsin Technology Corporation
FEATURE
1. High reliability and stability 2. Reduced size of final equipment 3. Lower assembly costs 4. Higher component and equipment reliability 5. Lead free products upon customer requested
APPLICATION
• • • • Consumer electrical equipment Automotive application 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 Lead-tin or Tin (lead free) alloy.
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Fig 1. Consctruction of a Chip-R
Page 2 of 10
WR12/WR08/WR06/WR04
Version 1
Feb.-2008
datasheet pdf - http://www.DataSheet4U.net/
Walsin Technology Corporation
QUICK REFERENCE DATA
Item
Series No. Size code Resistance Range Resistance Tolerance TCR (ppm/°C) 10MΩ R≤10Ω Max. dissipation @ Tamb=70°C Max. Operation Voltage (DC or RMS) Max. Overload Voltage (DC or RMS) Climatic category (IEC 60068) Note : 1. 2. This is the maximum voltage that may be continuously supplied to the resistor element, see “IEC publication 60115-8” Max. Operation Voltage : So called RCWV (Rated Continuous Working Voltage) is determined by R 10Ω
≤ ± 100 ≤ ± 200 ≤ ± 100 ≤ ± 200 ≤ ± 100 ≤ ± 200 ≤ ± 100 ≤ ± 200 ≤ ± 100 ≤ ± 200 ≤ ± 100 ≤ ± 200 ≤ ± 100 ≤ ± 200 ≤ ± 100 ≤ ± 200
General Specification
WR12 1206(3216) WR08 0805(2012) WR06 0603(1608) WR04 0402(1005)
1Ω~10MΩ(±5% tolerance),10Ω~1MΩ(±1% tolerance), Jumper ±1% E96/E24 ±5% E24 ±1% E96/E24 ±5% E24 ±1% E96/E24 ±5% E24 ±1% E96/E24 ±5% E24
1/4 W
1/8 W
1/10 W
1/16 W
200V
150V
50V
50V
400V
300V
100V
100V
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55/125/56
RCWV = Rated Power × Resistance Value or Max. RCWV listed above, whichever is lower.
3. 4. The resistance range 1~10Ω and 1M ~10MΩ with 1% tolerance please refer to WR12W / WR08W / WR06W series. The resistance of Jumper is defined <0.05Ω.
DIMENSIONS (unit : mm)
WR12 L W T Tb Tt 3.10 ± 0.10 1.60 ± 0.10 0.60 ± 0.15 0.45 ± 0.20 0.50 ± 0.20 WR08 2.00 ± 0.10 1.25 ± 0.10 0.50 ± 0.15 0.40 ± 0.20 0.40 ± 0.20 WR06 1.60 ± 0.10 0.80 ± 0.10 0.45 ± 0.15 0.30 ± 0.15 0.30 ± 0.10 WR04 1.00 ± 0.05 0.50 ± 0.05 0.35 ± 0.05 0.25 ± 0.10 0.20 ± 0.10
Page 3 of 10
WR12/WR08/WR06/WR04
Version 1
Feb.-2008
datasheet pdf - http://www.DataSheet4U.net/
Walsin Technology Corporation
MARKING
Size \ Nr. Of digit of code\tolerance 1206 (3216) 0805 (2012) 0603 (1608) 0402(1005) ±5% 3-digits marking 3-digits marking 3-digits marking N0 MARKING ±1% 4-digits marking 4-digits marking 3-digits marking
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. For values up to 9.1 the R is used as a decimal point. For values of 10.0 or greater the first 2 digits apply to the resistance value and third indicate the number of zeros to follow. 3-digits marking
Nominal resistance 1.E-24 series 2.E-96 series As 0603 WR06X ±5%. 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 EX : 3. Remark
CODE R_value CODE R_value
±1% : 0603
Description
B=101 17.8
C=102
D=103 =25A
E=104
F=105
=25X 178
1K78 =25B 1M78=25E
17K8=25C
178K=25D
There is no marking for the items are not under E-24 and E-96 series
CODE R_Value CODE R_value CODE
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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
Page 4 of 10
WR12/WR08/WR06/WR04
Version 1
Feb.-2008
datasheet pdf - http://www.DataSheet4U.net/
Wals.