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5. Select a Resistor to Drive an LED

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Jeevitham
Jeevitham
November 1, 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 LED current (using (12V-2V)/22mA = 454Ω, next E24 value = 470Ω).
  • ✅ Tolerance: ±5% meets the requirement.
  • ✅ Power Rating: 0.333W (1/3W) meets the minimum required rating of 0.33W.
        • Power dissipated = (Current²) × Resistance = (0.022A)² × 470Ω ≈ 0.227W, well within the limit.
  • ✅ Mounting Type: Surface Mount (1206 package) is suitable.
  • ✅ Technology: Thick Film is acceptable per the requirements.
  • ✅ RoHS Compliance: ROHS3 Compliant.

All specified criteria are met. This resistor is suitable for your LED current-limiting application.
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