| E24 | E48 | E96 | E24 | E48 | E96 | E24 | E48 | E96 | E24 | E48 | E96 | E1 | E3 | E6 | E12 |
| 100 | 100 | 100 | 180 | 178 | 178 | 330 | 316 | 316 | 560 | 562 | 562 | 100 | 100 | 100 | 100 |
| 102 | 182 | 324 | 576 | 120 | |||||||||||
| 105 | 105 | 187 | 187 | 332 | 332 | 590 | 590 | 150 | 150 | ||||||
| 107 | 191 | 340 | 604 | 180 | |||||||||||
| 110 | 110 | 110 | 200 | 196 | 196 | 360 | 348 | 348 | 620 | 619 | 619 | 220 | 220 | 220 | |
| 113 | 200 | 357 | 634 | 270 | |||||||||||
| 115 | 115 | 205 | 205 | 365 | 365 | 649 | 649 | 330 | 330 | ||||||
| 118 | 210 | 374 | 665 | 390 | |||||||||||
| 120 | 121 | 121 | 220 | 215 | 215 | 390 | 383 | 383 | 680 | 681 | 681 | 470 | 470 | 470 | |
| 124 | 221 | 392 | 698 | 560 | |||||||||||
| 127 | 127 | 226 | 226 | 402 | 402 | 715 | 715 | 680 | 680 | ||||||
| 130 | 232 | 412 | 732 | 820 | |||||||||||
| 130 | 133 | 133 | 240 | 237 | 237 | 430 | 422 | 422 | 750 | 750 | 750 | ||||
| 137 | 243 | 432 | 768 | ||||||||||||
| 140 | 140 | 249 | 249 | 442 | 442 | 787 | 787 | ||||||||
| 143 | 255 | 453 | 806 | ||||||||||||
| 150 | 147 | 147 | 270 | 261 | 261 | 470 | 464 | 464 | 820 | 825 | 825 | ||||
| 150 | 267 | 475 | 845 | ||||||||||||
| 154 | 154 | 274 | 274 | 487 | 487 | 866 | 866 | ||||||||
| 158 | 280 | 499 | 887 | ||||||||||||
| 160 | 162 | 162 | 300 | 287 | 287 | 510 | 511 | 511 | 910 | 909 | 909 | ||||
| 165 | 294 | 523 | 931 | ||||||||||||
| 169 | 169 | 301 | 301 | 536 | 536 | 953 | 953 | ||||||||
| 174 | 309 | 549 | 976 | ||||||||||||
The selection of passive component values, such as those for resistors and capacitors, is typically guided by E-series values that align with their precision level. This process involves a few structured steps for value refinement and selection based on the component's precision requirements. Here's a streamlined overview of this process:
1. Determine the Required Precision:
- Capacitors often utilize E12 series values.
- Resistors with 10% and 5% tolerance generally adhere to E24 series values.
- For 1% tolerance resistors, E96 series values are used.
- Series other than these are rarely employed in standard applications.
2. Value Selection Process:
To choose a specific value, follow these steps:
a. Start with the calculated target value.
b. Round this target value:
- To 2 significant figures for series E24 and below.
- To 3 significant figures for series E48 and above.
c. Locate the closest matching value in the respective E-series table, which will replace the rounded figures.
Example:
For a target resistance of 16,834.2Ω:
- First, round to 16,800Ω (for an E24 or lower series, though this example extends into higher precision practice).
- The closest E96 series value to 168 (significant figures of 16,800) is 169.
- Therefore, the chosen value is 16.9kΩ for an E96 precision resistor.
Special Note:
The value 0 is an exception and does not exist in any of the E-series values.
This structured approach ensures the selection of component values aligns with available standard values and the required precision for the application, optimizing both performance and availability.