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5. Select a Resistor to Drive an LED

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RMCF1210JT470RCT-ND
Component
DigiKey Part NoRMCF1210JT470RTR-ND
Mfr Part NoRMCF1210JT470R
ManufacturerStackpole Electronics Inc

RES 470 OHM 5% 1/2W 1210

470 Ohms ±5% 0.5W, 1/2W Chip Resistor 1210 (3225 Metric) Automotive AEC-Q200 Thick Film

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EW

Response By EW AI

  • Resistance: 470Ω matches the calculated value for 12V supply, 2V LED VF, and 22mA IF. (R = (12V-2V)/0.022A ≈ 455Ω; 470Ω is the standard value closest to this.)
  • Tolerance: ±5% meets the requirement of ±5% or better.
  • Power Rating: 0.5W exceeds the minimum required 0.33W. Calculated dissipation is (0.022A)^2 × 470Ω ≈ 0.227W, so 0.5W provides a good safety margin.
  • Mounting Type: 1210 package is surface mount, as required.
  • Technology: Thick Film matches specification.
  • RoHS Compliance: Listed as "ROHS3 Compliant".

Result: All requirements met; this resistor is approved for your LED indicator design.

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