Approval Sheet
MARKING
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3-digits marking for 0603 size
WFxxF / W has same marking rule as WRxx ±1%.
Nominal resistance
Description
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,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
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4-digits marking for 2512, 2010, 1210, 1206, 0805 size
For E24+E96, each resistor is marked with a four digits code on the protective coating to designate the
nominal resistance value. For values below 97Ω6 the R is used as a digit. For values of 100Ω or greater, the
first 3 digits are significant, the fourth digit indicates the number of multiple to follow.
Example
RESISTANCE
100Ω
6800Ω
47000Ω
1000
6801
4702
4-digits marking
ò
No marking code for 0402 size
FUNCTIONAL DESCRIPTION
Product characterization
Standard values of nominal resistance are taken from the E192 & E24 series for resistors with a tolerance of
±1.0%, ±0.5%, ±0.25%, ±0.1%,±0.05%, ±0.01%.The values of the E24/E192 series are in accordance with
“IEC publication 60063”.
Page 4 of 10
ASC_WFxxF&W_V03
NOV - 2018