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5. Select a Resistor to Drive an LED

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MaheshwariS
MaheshwariS
November 12, 2025
PCR1206-470RJ1
Component
DigiKey Part No696-PCR1206-470RJ1TR-ND
Mfr Part NoPCR1206-470RJ1
ManufacturerRiedon products by Bourns

RES SMD 470 OHM 5% 1/3W 1206

470 Ohms ±5% 0.333W, 1/3W Chip Resistor 1206 (3216 Metric) Pulse Withstanding Thick Film

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EW

Response By EW AI

  • ✅ Resistance: 470Ω — Matches the calculated value for 22mA at 12V with a 2V LED drop.
  • ✅ Tolerance: ±5% — Meets the requirement for ±5% or better.
  • ✅ Power Rating: 0.333W (1/3W) — Exactly meets the minimum required power rating (calculated dissipation is ~0.22W, so 0.333W provides a safe margin).
  • ✅ Mounting Type: Surface Mount (1206 package) — Suitable for PCB assembly as specified.
  • ✅ Technology: Thick Film — Acceptable per requirements.
  • ✅ RoHS Compliance: ROHS3 Compliant — Meets environmental requirements.
All key specifications are satisfied. This resistor is suitable for safely and reliably limiting current to a red LED in a 12V circuit.
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