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 — Matches calculated requirement for 22mA LED current.
- ✅ Tolerance: ±5% — Meets or exceeds the ±5% requirement.
- ✅ Power Rating: 0.5W — Exceeds the minimum required 0.33W. Calculated power dissipation is 0.22W (P = (10V × 22mA)), so 0.5W provides good margin for reliability.
- ✅ Mounting Type: 1206 Surface Mount — Fully suitable for PCB assembly.
- ✅ Technology: Thick Film — Acceptable per requirements.
- ✅ RoHS Compliance: Stated as ROHS3 Compliant.
Result: All key specifications are met or exceeded. This part is well-suited for your LED current-limiting application, ensuring safe operation, brightness, and long-term reliability.
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