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5. Select a Resistor to Drive an LED

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TAR06ATNU4700
Component
DigiKey Part No2577-TAR06ATNU4700TR-ND
Mfr Part NoTAR06ATNU4700
ManufacturerViking Tech

RES SMD 470 OHM 1/2W 1206

470 Ohms ±0.05% 0.5W, 1/2W Chip Resistor 1206 (3216 Metric) Anti-Sulfur, Automotive AEC-Q200, Moisture Resistant Thin Film

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EW

Response By EW AI

  • Resistance: 470Ω matches the calculated requirement (470Ω for 12V - 2V @ 22mA).
  • Tolerance: ±0.05% (much better than the required ±5%).
  • Power Rating: 0.5W (exceeds the minimum required 0.33W).
        Power dissipated in resistor: (10V × 22mA) = 0.22W, so 0.5W is more than sufficient for long-term reliability.
  • Mounting Type: Surface Mount (SMD 1206 package), as required.
  • Technology: Thin Film (acceptable per requirements).
  • RoHS Compliance: RoHS Compliant.
Conclusion: All critical specifications meet or exceed the design requirements for safe, reliable LED current limiting. This resistor is well-suited for your application.
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