Standard EIA Decade Resistor Values Table

 
 
 

    The Electronic Industries Association (EIA), and other authorities, specify standard values for resistors, sometimes referred to as the "preferred value" system. The preferred value system has its origins in the early years of the last century at a time when most resistors were carbon-graphite with relatively poor manufacturing tolerances. The rationale is simple - select values for components based on the tolerances with which they are able to be manufactured. Using 10% tolerance devices as an example, suppose that the first preferred value is 100 ohms. It makes little sense to produce a 105 ohm resistor since 105 ohms falls within the 10% tolerance range of the 100 ohm resistor. The next reasonable value is 120 ohms because the 100 ohm resistor with a 10% tolerance is expected to have a value somewhere between 900 and 110 ohms. The 120 ohm resistor has a value ranging between 110 and 130 ohms. Following this logic, the preferred values for 10% tolerance resistors between 100 and 1,000 ohms would be 100, 120, 150, 180, 220, 270, 330 and so on (rounded appropriately); this is the E12 series shown in the table below.
    The EIA "E" series specify the preferred values for various tolerances. The number following the "E" specifies the number of logarithmic steps per decade. The table below is normalized for the decade between 100 and 1,000. The values in any decade can be derived by merely dividing or multiplying the table entries by powers of 10. The series are as follows:

E6 20% tolerance,
E12 10% tolerance,
E24 5% tolerance (and usually 2% tolerance),
E48 2% tolerance,
E96 1% tolerance,
E192 .5, .25, .1% and higher tolerances.

           Standard EIA Decade Values Table (100 to 1,000 Decade)

E6 E12 E24 E48 E96 E192
100 100 100 100 100 100
101
102 102
104
105 105 105
106
107 107
109
110 110 110 110
111
113 113
114
115 115 115
117
118 118
120
120 120 121 121 121
123
124 124
126
127 127 127
129
130 130
132
130 133 133 133
135
137 137
138
140 140 140
142
143 143
145
150 150 150 147 147 147
149
150 150
152
154 154 154
156
158 158
160
160 162 162 162
164
165 165
167
169 169 169
172
174 174
176
180 180 178 178 178
180
182 182
184
187 187 187
189
191 191
193
200 196 196 196
198
200 200
203
205 205 205
208
210 210
213
E6 E12 E24 E48 E96 E192
220 220 220 215 215 215
218
221 221
223
226 226 226
229
232 232
234
240 237 237 237
240
243 243
246
249 249 249
252
255 255
258
270 270 261 261 261
264
267 267
271
274 274 274
277
280 280
284
300 287 287 287
291
294 294
298
301 301 301
305
309 309
312
330 330 330 316 316 316
320
324 324
328
332 332 332
336
340 340
344
360 348 348 348
352
357 357
361
365 365 365
370
374 374
379
390 390 383 383 383
388
392 392
397
402 402 402
407
412 412
417
430 422 422 422
427
432 432
437
442 442 442
448
453 453
459
E6 E12 E24 E48 E96 E192
470 470 470 464 464 464
470
475 475
481
487 487 487
493
499 499
505
510 511 511 511
517
523 523
530
536 536 536
542
549 549
556
560 560 562 562 562
569
576 576
583
590 590 590
597
604 604
612
620 619 619 619
626
634 634
642
649 649 649
657
665 665
673
680 680 680 681 681 681
690
698 698
706
715 715 715
723
732 732
741
750 750 750 750
759
768 768
777
787 787 787
796
806 806
816
820 820 825 825 825
835
845 845
856
866 866 866
876
887 887
898
910 909 909 909
920
931 931
942
953 953 953
965
976 976
988
   
                   
         
                   
         
         
 

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