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EIA Standard Resistor & Capacitor Values
Standard Values
These are normalised to 100R. For different values just move the decimal point left or right.
E3 (±50%) |
E6 (±20%) |
E12 (±10%) |
E24 (±5%) |
|
E48 (±2%) |
E96 (±1%) |
E192 (±0.5%, ±0.25%, ±0.1%) |
100 |
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 |
220 |
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 |
470 |
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 |
Note: there is a slight mismatch between the E6-E24 series and the E48-E192 series in the above table
(for example 120Ω in the E24 series does not align with 120Ω in the E192 series). One day
I might get round to fixing it.
The following table give ratios between each value in the E24 resistor series
to two decimal places. The values not in E12 are italicised.
To use the table simply read off the row and column to find the ratio between
them. For example, to find the ratio between 2.2 and 1.8, scan the top row to
find "2.2", then down the column until you meet the "1.8" row, giving 1.22.
| 1.00 | 1.10 | 1.20 | 1.30 | 1.50 | 1.60 | 1.80 | 2.00 | 2.20 | 2.40 | 2.70 | 3.00 | 3.30 | 3.60 | 3.90 | 4.30 | 4.70 | 5.10 | 5.60 | 6.20 | 6.80 | 7.50 | 8.20 | 9.10 |
1.00 | 1.00 | 1.10 | 1.20 | 1.30 | 1.50 | 1.60 | 1.80 | 2.00 | 2.20 | 2.40 | 2.70 | 3.00 | 3.30 | 3.60 | 3.90 | 4.30 | 4.70 | 5.10 | 5.60 | 6.20 | 6.80 | 7.50 | 8.20 | 9.10 |
1.10 | 0.91 | 1.00 | 1.09 | 1.18 | 1.36 | 1.45 | 1.64 | 1.82 | 2.00 | 2.18 | 2.45 | 2.73 | 3.00 | 3.27 | 3.55 | 3.91 | 4.27 | 4.64 | 5.09 | 5.64 | 6.18 | 6.82 | 7.45 | 8.27 |
1.20 | 0.83 | 0.92 | 1.00 | 1.08 | 1.25 | 1.33 | 1.50 | 1.67 | 1.83 | 2.00 | 2.25 | 2.50 | 2.75 | 3.00 | 3.25 | 3.58 | 3.92 | 4.25 | 4.67 | 5.17 | 5.67 | 6.25 | 6.83 | 7.58 |
1.30 | 0.77 | 0.85 | 0.92 | 1.00 | 1.15 | 1.23 | 1.38 | 1.54 | 1.69 | 1.85 | 2.08 | 2.31 | 2.54 | 2.77 | 3.00 | 3.31 | 3.62 | 3.92 | 4.31 | 4.77 | 5.23 | 5.77 | 6.31 | 7.00 |
1.50 | 0.67 | 0.73 | 0.80 | 0.87 | 1.00 | 1.07 | 1.20 | 1.33 | 1.47 | 1.60 | 1.80 | 2.00 | 2.20 | 2.40 | 2.60 | 2.87 | 3.13 | 3.40 | 3.73 | 4.13 | 4.53 | 5.00 | 5.47 | 6.07 |
1.60 | 0.63 | 0.69 | 0.75 | 0.81 | 0.94 | 1.00 | 1.13 | 1.25 | 1.38 | 1.50 | 1.69 | 1.88 | 2.06 | 2.25 | 2.44 | 2.69 | 2.94 | 3.19 | 3.50 | 3.88 | 4.25 | 4.69 | 5.12 | 5.69 |
1.80 | 0.56 | 0.61 | 0.67 | 0.72 | 0.83 | 0.89 | 1.00 | 1.11 | 1.22 | 1.33 | 1.50 | 1.67 | 1.83 | 2.00 | 2.17 | 2.39 | 2.61 | 2.83 | 3.11 | 3.44 | 3.78 | 4.17 | 4.56 | 5.06 |
2.00 | 0.50 | 0.55 | 0.60 | 0.65 | 0.75 | 0.80 | 0.90 | 1.00 | 1.10 | 1.20 | 1.35 | 1.50 | 1.65 | 1.80 | 1.95 | 2.15 | 2.35 | 2.55 | 2.80 | 3.10 | 3.40 | 3.75 | 4.10 | 4.55 |
2.20 | 0.45 | 0.50 | 0.55 | 0.59 | 0.68 | 0.73 | 0.82 | 0.91 | 1.00 | 1.09 | 1.23 | 1.36 | 1.50 | 1.64 | 1.77 | 1.95 | 2.14 | 2.32 | 2.55 | 2.82 | 3.09 | 3.41 | 3.73 | 4.14 |
2.40 | 0.42 | 0.46 | 0.50 | 0.54 | 0.63 | 0.67 | 0.75 | 0.83 | 0.92 | 1.00 | 1.13 | 1.25 | 1.38 | 1.50 | 1.63 | 1.79 | 1.96 | 2.13 | 2.33 | 2.58 | 2.83 | 3.13 | 3.42 | 3.79 |
2.70 | 0.37 | 0.41 | 0.44 | 0.48 | 0.56 | 0.59 | 0.67 | 0.74 | 0.81 | 0.89 | 1.00 | 1.11 | 1.22 | 1.33 | 1.44 | 1.59 | 1.74 | 1.89 | 2.07 | 2.30 | 2.52 | 2.78 | 3.04 | 3.37 |
3.00 | 0.33 | 0.37 | 0.40 | 0.43 | 0.50 | 0.53 | 0.60 | 0.67 | 0.73 | 0.80 | 0.90 | 1.00 | 1.10 | 1.20 | 1.30 | 1.43 | 1.57 | 1.70 | 1.87 | 2.07 | 2.27 | 2.50 | 2.73 | 3.03 |
3.30 | 0.30 | 0.33 | 0.36 | 0.39 | 0.45 | 0.48 | 0.55 | 0.61 | 0.67 | 0.73 | 0.82 | 0.91 | 1.00 | 1.09 | 1.18 | 1.30 | 1.42 | 1.55 | 1.70 | 1.88 | 2.06 | 2.27 | 2.48 | 2.76 |
3.60 | 0.28 | 0.31 | 0.33 | 0.36 | 0.42 | 0.44 | 0.50 | 0.56 | 0.61 | 0.67 | 0.75 | 0.83 | 0.92 | 1.00 | 1.08 | 1.19 | 1.31 | 1.42 | 1.56 | 1.72 | 1.89 | 2.08 | 2.28 | 2.53 |
3.90 | 0.26 | 0.28 | 0.31 | 0.33 | 0.38 | 0.41 | 0.46 | 0.51 | 0.56 | 0.62 | 0.69 | 0.77 | 0.85 | 0.92 | 1.00 | 1.10 | 1.21 | 1.31 | 1.44 | 1.59 | 1.74 | 1.92 | 2.10 | 2.33 |
4.30 | 0.23 | 0.26 | 0.28 | 0.30 | 0.35 | 0.37 | 0.42 | 0.47 | 0.51 | 0.56 | 0.63 | 0.70 | 0.77 | 0.84 | 0.91 | 1.00 | 1.09 | 1.19 | 1.30 | 1.44 | 1.58 | 1.74 | 1.91 | 2.12 |
4.70 | 0.21 | 0.23 | 0.26 | 0.28 | 0.32 | 0.34 | 0.38 | 0.43 | 0.47 | 0.51 | 0.57 | 0.64 | 0.70 | 0.77 | 0.83 | 0.91 | 1.00 | 1.09 | 1.19 | 1.32 | 1.45 | 1.60 | 1.74 | 1.94 |
5.10 | 0.20 | 0.22 | 0.24 | 0.25 | 0.29 | 0.31 | 0.35 | 0.39 | 0.43 | 0.47 | 0.53 | 0.59 | 0.65 | 0.71 | 0.76 | 0.84 | 0.92 | 1.00 | 1.10 | 1.22 | 1.33 | 1.47 | 1.61 | 1.78 |
5.60 | 0.18 | 0.20 | 0.21 | 0.23 | 0.27 | 0.29 | 0.32 | 0.36 | 0.39 | 0.43 | 0.48 | 0.54 | 0.59 | 0.64 | 0.70 | 0.77 | 0.84 | 0.91 | 1.00 | 1.11 | 1.21 | 1.34 | 1.46 | 1.63 |
6.20 | 0.16 | 0.18 | 0.19 | 0.21 | 0.24 | 0.26 | 0.29 | 0.32 | 0.35 | 0.39 | 0.44 | 0.48 | 0.53 | 0.58 | 0.63 | 0.69 | 0.76 | 0.82 | 0.90 | 1.00 | 1.10 | 1.21 | 1.32 | 1.47 |
6.80 | 0.15 | 0.16 | 0.18 | 0.19 | 0.22 | 0.24 | 0.26 | 0.29 | 0.32 | 0.35 | 0.40 | 0.44 | 0.49 | 0.53 | 0.57 | 0.63 | 0.69 | 0.75 | 0.82 | 0.91 | 1.00 | 1.10 | 1.21 | 1.34 |
7.50 | 0.13 | 0.15 | 0.16 | 0.17 | 0.20 | 0.21 | 0.24 | 0.27 | 0.29 | 0.32 | 0.36 | 0.40 | 0.44 | 0.48 | 0.52 | 0.57 | 0.63 | 0.68 | 0.75 | 0.83 | 0.91 | 1.00 | 1.09 | 1.21 |
8.20 | 0.12 | 0.13 | 0.15 | 0.16 | 0.18 | 0.20 | 0.22 | 0.24 | 0.27 | 0.29 | 0.33 | 0.37 | 0.40 | 0.44 | 0.48 | 0.52 | 0.57 | 0.62 | 0.68 | 0.76 | 0.83 | 0.91 | 1.00 | 1.11 |
9.10 | 0.11 | 0.12 | 0.13 | 0.14 | 0.16 | 0.18 | 0.20 | 0.22 | 0.24 | 0.26 | 0.30 | 0.33 | 0.36 | 0.40 | 0.43 | 0.47 | 0.52 | 0.56 | 0.62 | 0.68 | 0.75 | 0.82 | 0.90 | 1.00 |
This table can be used in a number of ways. For example:
- A typical post-fade amp is a non-inverting amplifier with a gain of +10dB.
In absolute terms the amplifier needs a gain of 3.16. For the non-inverting amplifier configuration
we need a resistor ratio of 2.16. From the table above it looks like 3.9 and 1.8 are the closest,
with a ratio of 2.17. In a circuit you could then use a 3k9 and 1k8 resistors.
Some ratios are rather useful, and I have listed then here. They are based on
a minimal set of values giving many useful ratios: 10, 11, 15, 22, 33, 51, 75.
Resistors (A:B) |
Ratio (1:n) |
Reciprocal |
Potential Divider - ABTM:BTOP |
Potential Divider - BBTM:ATOP |
Uses |
10:10 |
1 |
1 |
1/2 |
1/2 |
6dB attenuator, x2 (+6dB) gain for non-inverting OA |
10:15 |
1.5 |
2/3 |
2/5 |
3/5 |
|
22:33 |
1.5 |
2/3 |
2/5 |
3/5 |
|
11:22 |
2 |
1/2 |
1/3 |
2/3 |
10dB attenuator, x2 (+6dB) gain for inverting OA |
10:22 |
2.2 |
|
5/16 |
11/16 |
+10dB gain for non-inverting OA |
15:33 |
2.2 |
|
5/16 |
11/16 |
+10dB gain for non-inverting OA |
11:33 |
3 |
1/3 |
1/4 |
3/4 |
|
10:33 |
3.3 |
|
|
|
+10dB gain for inverting OA |
15:75 |
5 |
1/5 |
1/6 |
5/6 |
|
The table below shows the minimum permissible resistor values for a range of common resistor power ratings
and some common voltages. Note that this table does not allow for any derating.
| 0.063W (63mW) | 0.1W (100mW) | 0.25W (250mW) | 0.4W (400mW) | 0.6W (600mW) | 1W |
3V3 | 172.9 | 108.9 | 43.6 | 27.2 | 18.1 | 10.9 |
5V | 396.8 | 250.0 | 100.0 | 62.5 | 41.7 | 25.0 |
9V | 1285.7 | 810.0 | 324.0 | 202.5 | 135.0 | 81.0 |
12V | 2285.7 | 1440.0 | 576.0 | 360.0 | 240.0 | 144.0 |
15V | 3571.4 | 2250.0 | 900.0 | 562.5 | 375.0 | 225.0 |
18V | 5142.9 | 3240.0 | 1296.0 | 810.0 | 540.0 | 324.0 |
24V | 9142.9 | 5760.0 | 2304.0 | 1440.0 | 960.0 | 576.0 |
30V | 14285.7 | 9000.0 | 3600.0 | 2250.0 | 1500.0 | 900.0 |
For example, consider an LED across a 15V supply. Allow 2 volts for the LED, and we want 10mA. We have 13 volts to drop, so we need
a 1300 Ohm resistor. Using the above table look at the 12V row (closest voltage) and then scan along to the column with 576.0 Ohms.
Read off the resistor power rating at the top of the column: 250mW in this case. To compare, the actual power dissipated
would be 130mW - so we could not use a 100mW resistor, the next common size up being 250mW.
Colour | Unit | Multiplier | Tolerance
(± %) | Temp. Coeff (ppm/°C) |
Black |
0 | 1 | | |
Brown |
1 | 10 | 1 (F) | 100 |
Red |
2 | 100 | 2 (G) | 50 |
Orange |
3 | 1,000 | 3 (H) | 15 |
Yellow |
4 | 10,000 | | 25 |
Green |
5 | 100,000 | 0.5 (D) | |
Blue |
6 | 1,000,000 | 0.25 (Q) | 10 |
Violet |
7 | 10,000,000 | 0.1 (B) | 5 |
Grey |
8 | 100,000,000 | 0.05 (A) | |
White |
9 | 1,000,000,000 | | 1 |
Gold |
| 0.1 | 5 (J) | |
Silver |
| 0.01 | 10 (K) | |
Pink |
| | 20 (M) | |
The letters in the tolerance column apply to smaller components and
capacitors. E.g. a SIL resistor marked "473K" is 47k, ±10%.
Type | Band |
1 | 2 | 3 | 4 | 5 | 6 |
4 Band | Value | Value | Multiplier | Tolerance | | |
5 Band | Value | Value | Value | Multiplier | Tolerance | |
6 Band | Value | Value | Value | Multiplier | Tolerance | Temp Coeff. |
Note: If the tolerance band is missing (for 4- or 5-band), assume ±20%.
Temperature Compensation Resistors
Temperature compensation resistors ("tempcos" or TCRs) use a similar marking scheme, where:
Type | Band |
1 | 2 | 3 | 4 | 5 |
5 Band | Value | Value | Multipler | TempCo | TempCo |
The last two bands indicate the temperature coefficient:
Value | Coefficient (ppm/°C) |
30 | 3000 |
33 | 3300 |
35 | 3500 |
39 | 3900 |
Note that this temperature coefficient is different from the standard marking scheme above: firstly, the values are much
larger (thousands of ppm compared to tens), and the marking scheme uses two bands, not one.
Examples:
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)-- | 1k37, ±1%, 50ppm/°C |
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