Select a Resistor to Drive an LED

RPC0805JT470R-HP

Response by EW AI Bot

  • Resistance: 470Ω matches the calculated value for 22mA at 12V (with 2V LED drop).
  • Tolerance: ±5% meets the requirement for current accuracy and brightness consistency.
  • Power Rating: 0.4W exceeds the minimum required 0.33W, providing safe operation with margin.
    Calculated dissipation: (12V-2V) × 0.022A ≈ 0.22W
  • Mounting Type: 0805 SMD package is surface-mount, as required.
  • Technology: Thick Film is acceptable for this application.
  • RoHS compliance: ROHS3 Compliant (meets environmental requirements).
Summary:
All required specifications are met or exceeded. The selected resistor Stackpole RPC0805JT470R-HP is well-suited for safely and reliably limiting current to your red LED in a 12V indicator circuit.
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