5. Select a Resistor to Drive an LED

• ✅ Resistance: 470Ω matches the calculated value for 22mA with a 12V supply and 2V LED drop. This will provide the desired LED brightness.
• ✅ Tolerance: ±5% meets the requirement for accuracy and consistent current limiting.
• ✅ Power Rating: 0.5W (1/2W) > 0.33W minimum required. This ensures safe operation and long-term reliability. (Actual resistor dissipation: (10V × 22mA) = 0.22W, giving a comfortable safety margin.)
• ✅ Mounting Type: 1206 is a surface-mount package, suitable for modern PCB assembly.
• ✅ Technology: Thick Film, as required (robust for this application).
• ✅ RoHS Compliance: Marked as RoHS3 compliant, confirming environmental safety.

Conclusion: All key criteria are met or exceeded. This resistor is well-suited for the red LED current-limiting application.