5. Select a Resistor to Drive an LED
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Rc1206jr-7w470rl
| DigiKey Part No | 13-RC1206JR-7W470RLTR-ND |
| Mfr Part No | RC1206JR-7W470RL |
| Manufacturer | YAGEO |
RES 470 OHM 5% 1/2W 1206
470 Ohms ±5% 0.5W, 1/2W Chip Resistor 1206 (3216 Metric) Moisture Resistant Thick Film
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- ✅ Resistance: 470Ω ±5% — Matches the calculated requirement for a 12V to 2V (LED) drop at 22mA. Correct value for desired current.
- ✅ Power Rating: 0.5W — Exceeds the minimum required (0.33W). Power dissipation through the resistor will be (12V-2V) x 0.022A = 0.22W, so 0.5W provides ample margin for reliability and longevity.
- ✅ Tolerance: ±5% — Meets the requirement (5% or better).
- ✅ Mounting Type: Surface Mount (1206 package) — Correct as specified.
- ✅ Technology: Thick Film — Acceptable per requirements.
- ✅ RoHS Compliance: ROHS3 Compliant — Meets environmental requirements.
Summary: All required specs are satisfied. This part is well-suited for your 12V red LED indicator application, with sufficient power margin for safe, reliable operation.
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