Select a Resistor to Drive an LED

RC1206JR-7W470RL

Response by EW AI Bot

  • Resistance: 470Ω matches the calculated requirement for a 12V to 2V drop at 22mA (R = (12V-2V)/0.022A ≈ 455Ω; 470Ω is the nearest standard value and well within spec).
  • Tolerance: ±5% meets the requirement of ±5% or better.
  • Power Rating: 0.5W (1/2W) exceeds the minimum required 0.33W. Calculated maximum dissipation is (VR × I) = (10V × 0.022A) = 0.22W, so 0.5W is more than adequate for long-term reliability.
  • Mounting Type: 1206 package is a standard surface-mount format, suitable for PCB assembly.
  • Technology: Thick Film, as specified.
  • RoHS Compliance: Marked as ROHS3 Compliant.

Conclusion: All specifications are met or exceeded. The selected resistor (YAGEO RC1206JR-7W470RL) is a safe, reliable, and compliant choice for your LED current limiting application.

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