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5. Select a Resistor to Drive an LED

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PT470AFDKR-ND
Component
DigiKey Part NoPT470AFTR-ND
Mfr Part NoERJ-1TNF4700U
ManufacturerPanasonic Electronic Components

RES SMD 470 OHM 1% 1W 2512

470 Ohms ±1% 1W Chip Resistor 2512 (6332 Metric) Automotive AEC-Q200 Thick Film

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Response By EW AI

  • Resistance: 470Ω — Matches the required value for 22mA through a 2V LED on 12V.
  • Tolerance: ±1% — Better than the required ±5%, ensuring more consistent LED brightness.
  • Power Rating: 1W — Exceeds the minimum requirement of 0.33W. Calculated dissipation is (10V × 0.022A) = 0.22W, so this is more than adequate for long-term reliability.
  • Mounting Type: Surface Mount (2512 package) — Fully meets the surface mount requirement.
  • Technology: Thick Film — As required for the application.
  • RoHS Compliance: Yes (ROHS3 Compliant).

All critical specifications are met or exceeded. This resistor is well-suited for your LED current-limiting application and will ensure both safe operation and long-term reliability.

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