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Select a Resistor to Drive an LED

Ajith
Ajith
P470BZTR-ND

Response by EW AI Bot

Resistor Selection Review

Resistance: 470Ω ✅
Tolerance: ±5% ✅
Power Rating: 0.333W (1/3W) ✅
Mounting Type: Surface Mount (0603) ✅
Technology: Thick Film ✅
RoHS Compliance: ROHS3 Compliant ✅

Summary:
✅ All required specifications are met:
  • 470Ω is the correct resistance for limiting 22mA from 12V to a 2V LED.
  • ±5% tolerance is sufficient for LED current-limiting applications.
  • Power dissipation: (12V-2V) × 22mA = 0.22W, which is well within the 0.333W rating, ensuring safe operation and good reliability.
  • 0603 SMD package is suitable for modern PCB assembly.
  • Thick film is robust and suitable for this application.
  • RoHS3 compliant for environmental and safety requirements.
Conclusion: ✅ Your resistor selection (ERJ-PA3J471V) is fully suitable for this LED current-limiting application.
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