5. Select a Resistor to Drive an LED
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ERJ-1TNF4700U
| DigiKey Part No | PT470AFTR-ND |
| Mfr Part No | ERJ-1TNF4700U |
| Manufacturer | Panasonic 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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- ✅ Resistance: 470Ω – Matches calculated requirement (470Ω ±5%) for 12V supply, 2V LED, 22mA.
- ✅ Tolerance: 1% – Better than required (±5% or better).
- ✅ Power Rating: 1W – Exceeds minimum required (≥0.33W). Calculated dissipation: (12V-2V) × 22mA = 0.22W.
- ✅ Mounting Type: Surface Mount (2512 case) – Suitable for SMT assembly.
- ✅ Technology: Thick Film – Meets specification.
- ✅ RoHS Compliance: Yes (ROHS3 Compliant) – Environmentally safe.
All key specifications are met or exceeded. This resistor is suitable for the LED current limiting application, providing safe operation, margin for power dissipation, and reliable SMT compatibility.
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