5. Select a Resistor to Drive an LED
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P470BZTR-ND
| DigiKey Part No | P470BZTR-ND |
| Mfr Part No | ERJ-PA3J471V |
| Manufacturer | Panasonic Electronic Components |
RES SMD 470 OHM 5% 1/3W 0603
470 Ohms ±5% 0.333W, 1/3W Chip Resistor 0603 (1608 Metric) Automotive AEC-Q200, Pulse Withstanding Thick Film
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- ✅ Resistance: 470Ω ±5% — Matches calculated requirement for 22mA current limiting (470Ω = (12V - 2V) / 0.022A).
- ✅ Tolerance: ±5% — Meets or exceeds the ±5% specification, ensuring consistent LED brightness.
- ✅ Power Rating: 0.333W (1/3W) — Meets the minimum requirement (≥0.33W), supporting safe long-term operation.
Actual power dissipation: (0.022A)2 × 470Ω = 0.228W (well within the resistor's rating). - ✅ Mounting Type: 0603 Surface Mount — Fully suitable for modern SMT PCB assembly.
- ✅ Technology: Thick Film — Acceptable for LED current limiting and specified in requirements.
- ✅ RoHS Compliance: ROHS3 Compliant — Environmentally friendly and globally accepted.
Conclusion: All specifications are matched or exceeded. This resistor is fully suitable for your 12V red LED indicator design.
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