5. Select a Resistor to Drive an LED

• ✅ Resistance: 470Ω — Matches calculated value for 12V supply, 2V LED Vf, and 22mA LED current.
• ✅ Tolerance: ±5% — Meets requirement for ±5% or better.
• ✅ Power Rating: 0.5W (1/2W) — Exceeds minimum required 0.33W.
  (Dissipation in this use: (12V-2V)×0.022A = 0.22W, so this resistor has good margin.)
• ✅ Mounting Type: 0805 Surface Mount — Fully compatible with PCB assembly.
• ✅ Technology: Thick Film — Acceptable and commonly used for this application.
• ✅ RoHS Compliance: ROHS3 Compliant — Meets environmental requirements.

All specs are matched or exceeded. This part is a reliable choice for your 12V red LED indicator circuit.