5. Select a Resistor to Drive an LED
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A126441TR-ND
| DigiKey Part No | A126441TR-ND |
| Mfr Part No | CRGH0805J470R |
| Manufacturer | TE Connectivity Passive Product |
RES 470 OHM 5% 1/3W 0805
470 Ohms ±5% 0.333W, 1/3W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film
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- ✅ Resistance: 470Ω matches the calculated requirement for 22mA LED current (using (12V-2V)/22mA = 454.5Ω, rounded to standard value 470Ω).
- ✅ Tolerance: ±5% meets the requirement ("±5% or better").
- ✅ Power Rating: 0.333W (1/3W) meets the minimum requirement of ≥0.33W.
Check: Power dissipated = (I²)R = (0.022²)×470 ≈ 0.227W, which is well within 0.333W rating. - ✅ Mounting Type: 0805 package is a standard surface-mount format.
- ✅ Technology: Thick Film, as required.
- ✅ RoHS Compliance: ROHS3 Compliant.
Conclusion: Approved for use as an LED current-limiting resistor in this application.
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