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5. Select a Resistor to Drive an LED

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RC1206JR-7W470RL
Component
DigiKey Part No13-RC1206JR-7W470RLTR-ND
Mfr Part NoRC1206JR-7W470RL
ManufacturerYAGEO

RES 470 OHM 5% 1/2W 1206

470 Ohms ±5% 0.5W, 1/2W Chip Resistor 1206 (3216 Metric) Moisture Resistant Thick Film

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EW

Response By EW AI

  • Resistance: 470Ω — Matches the calculated value needed for 22mA LED current with a 12V supply and 2V LED forward voltage.
  • Tolerance: ±5% — Meets the requirement for ±5% or better.
  • Power Rating: 0.5W — Exceeds the minimum requirement of 0.33W. The resistor will dissipate approximately 0.22W (P = (VR)² / R = (10V)² / 470Ω ≈ 0.213W), which is well within the part's rating for long-term reliability.
  • Mounting Type: Surface Mount (1206 package) — Fully suitable for your design.
  • Technology: Thick Film — Meets the requirement for Thick or Thin Film.
  • RoHS Compliance: Yes (ROHS3 Compliant) — Environmentally compliant.

Summary: All required specifications are met or exceeded. This resistor is appropriate for your LED current-limiting application in terms of value, power handling, and reliability.

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