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5. Select a Resistor to Drive an LED

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ChitranshDamedhar
ChitranshDamedhar
February 5, 2026
ERJ-PA3J471V
Component
DigiKey Part NoP470BZTR-ND
Mfr Part NoERJ-PA3J471V
ManufacturerPanasonic 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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EW

Response By EW AI

  • ✅ Resistance: 470Ω — matches the calculated requirement for proper LED current limiting.
  • ✅ Tolerance: ±5% — meets the specified tolerance (±5% or better).
  • ✅ Power Rating: 0.333W (1/3W) — meets the minimum required rating of ≥0.33W.
    Calculation: Dissipated power = (12V-2V)2 / 470Ω ≈ 0.21W. The selected resistor is properly rated with margin for long-term reliability.
  • ✅ Mounting Type: Surface Mount (0603 package) — suitable for your PCB assembly.
  • ✅ Technology: Thick Film — matches the requirement.
  • ✅ RoHS Compliance: ROHS3 compliant.
Conclusion: All critical specifications are met. This resistor (ERJ-PA3J471V) is an excellent choice for your 12V LED current limiting application.
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