5. Select a Resistor to Drive an LED
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DTO025C470R0JTE3
| DigiKey Part No | 716-1070-5-ND |
| Mfr Part No | DTO025C470R0JTE3 |
| Manufacturer | Vishay Sfernice |
RES SMD 470 OHM 5% 25W TO252
470 Ohms ±5% 25W Chip Resistor TO-252-3, DPAK (2 Leads + Tab), SC-63 Automotive AEC-Q200, Non-Inductive Thick Film
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- ✅ Resistance Value: 470Ω matches the calculated requirement for 22mA through a 2V red LED with a 12V supply.
- ✅ Tolerance: ±5% is within the specified tolerance (±5% or better).
- ✅ Power Rating: 25W is vastly higher than the required 0.33W minimum, ensuring exceptional reliability and cool operation.
- ✅ Mounting Type: TO-252 (DPAK) is a standard surface-mount package, suitable for SMT assembly.
- ✅ Technology: Thick Film, as required.
- ✅ RoHS Compliance: ROHS3 Compliant.
- ⚠️ Note: The 25W power rating is extreme overkill for this application (worst-case dissipation is only ~0.22W). This part is much larger and more expensive than typical SMD resistors for LED current limiting, but it technically meets all requirements and will function correctly.
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