5. Select a Resistor to Drive an LED
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ERJ-PA3J471V
| 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 — Matches calculated value for 12V - 2V = 10V / 22mA = 454.5Ω (470Ω is the nearest standard and suitable value).
- ✅ Tolerance: ±5% — Meets the requirement (±5% or better).
- ✅ Power Rating: 0.333W (1/3W) — Meets the requirement (≥0.33W).
• Power dissipation check: (10V * 22mA) = 0.22W, which is well below the resistor's 0.333W rating, providing a good safety margin for reliability. - ✅ Mounting Type: Surface Mount (0603) — Satisfies surface-mount requirement.
- ✅ Technology: Thick Film — Meets specification (Thick Film or Thin Film acceptable).
- ✅ RoHS Compliance: ROHS3 Compliant — Satisfies lead-free and environmental requirements.
Summary: All required specifications are met. This resistor is a safe and reliable choice for current limiting in your 12V red LED design.
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