5. Select a Resistor to Drive an LED
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CRGH0805J470R
| DigiKey Part No | A126441TR-ND |
| Mfr Part No | CRGH0805J470R |
| Manufacturer | TE Connectivity Passive Product |
RES 470 OHM 5% 1/3W 0805
470 Ohms ±5% 0.333W, 1/3W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film
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- ✅ Resistance: 470Ω — Matches calculated value for 22mA LED current at 12V - 2V = 10V across the resistor (10V / 470Ω ≈ 21.3mA)
- ✅ Tolerance: ±5% — Meets the requirement for ±5% or better
- ✅ Power Rating: 0.333W (1/3W) — Meets the required ≥0.33W.
Power dissipated: P = I²R ≈ (0.022A)² × 470Ω ≈ 0.227W, which is below the rating - ✅ Mounting Type: 0805 Surface Mount — Satisfies surface-mount requirement
- ✅ Technology: Thick Film — Acceptable per requirement
- ✅ RoHS Compliance: RoHS3 Compliant — Environmentally suitable
Conclusion: This resistor (CRGH0805J470R) is fully suitable for your 12V LED indicator circuit.
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