5. Select a Resistor to Drive an LED
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CRM1206-JW-471ELF
| DigiKey Part No | CRM1206-JW-471ELF-ND |
| Mfr Part No | CRM1206-JW-471ELF |
| Manufacturer | Bourns Inc. |
RES SMD 470 OHM 5% 1/2W 1206
470 Ohms ±5% 0.5W, 1/2W Chip Resistor 1206 (3216 Metric) Current Sense Thick Film
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- ✅ Resistance: 470Ω — Matches the calculated value for 12V → (12V - 2V) / 22mA = 454.5Ω. 470Ω is the closest standard value, ensuring safe current limiting for the LED.
- ✅ Tolerance: ±5% — Meets or exceeds the required tolerance.
- ✅ Power Rating: 0.5W (1/2W) — Exceeds the minimum required (≥0.33W). The resistor will dissipate P = I²R = (0.022A)² × 470Ω ≈ 0.228W, so 0.5W provides a safe margin for reliability.
- ✅ Mounting Type: 1206 SMD — Fully suitable for surface mount applications as required.
- ✅ Technology: Thick Film — Matches the requirement for Thick Film or Thin Film technology.
- ✅ RoHS Compliance: ROHS3 Compliant — Environmentally compliant as requested.
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