5. Select a Resistor to Drive an LED

• ✅ Resistance: 470Ω — matches calculated requirement for 22mA through the LED (12V - 2V) / 22mA ≈ 455Ω. 470Ω is the nearest E24 value and results in ~21.3mA, which is excellent.
• ✅ Tolerance: ±5% — meets or exceeds the specified tolerance (±5% or better).
• ✅ Power Rating: 0.5W (1/2W) — greatly exceeds the minimum required 0.33W. Power dissipated in resistor is P = I²R ≈ (0.022A)² × 470Ω ≈ 0.23W, so 0.5W is very safe and ensures reliability.
• ✅ Mounting Type: Surface Mount 0805 — suitable for SMT assembly as required.
• ✅ Technology: Thick Film — matches the requirement (Thick Film or Thin Film).
• ✅ RoHS Compliance: ROHS3 Compliant — environmentally compliant as required.

Summary: All specifications are met or exceeded. This is an excellent and reliable choice for your red LED current-limiting application.