Tolerance → E-series
| ±20% | E6: 1.0, 1.5, 2.2, 3.3, 4.7, 6.8 (rarely stocked today) |
|---|---|
| ±10% | E12 |
| ±5% | E24 |
| ±2% | E48 |
| ±1% | E96 (most common 1% series) |
| ±0.5% or better | E192 |
E24 (±5%) values
| Values (× 10ⁿ Ω) | |
|---|---|
| First decade | 1.0, 1.1, 1.2, 1.3, 1.5, 1.6, 1.8, 2.0, 2.2, 2.4, 2.7, 3.0 |
| Second half | 3.3, 3.6, 3.9, 4.3, 4.7, 5.1, 5.6, 6.2, 6.8, 7.5, 8.2, 9.1 |
E12 (±10%) values
| Values | 1.0, 1.2, 1.5, 1.8, 2.2, 2.7, 3.3, 3.9, 4.7, 5.6, 6.8, 8.2 |
|---|
Power ratings (common)
| Package | Power |
|---|---|
| 0402 | 1/16 W |
| 0603 | 1/10 W |
| 0805 | 1/8 W |
| 1206 | 1/4 W |
| 1210 | 1/3 W |
| 2010 | 3/4 W |
| 2512 | 1 W |
Notes
- Derate resistor dissipation to ~50% of rating for reliability and thermal margin.
- Thin-film (0.1%) and wirewound resistors have much better tempco than thick-film (typically ±100 ppm/°C).
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