5. Select a Resistor to Drive an LED

• ✅ Resistance: 470Ω matches the calculated requirement (470Ω for 22mA LED current at 12V supply and 2V LED drop).
• ✅ Tolerance: ±1% is better than the required ±5%, ensuring more precise current regulation.
• ✅ Power Rating: 0.4W exceeds the required 0.33W. Calculated dissipation is (12V-2V) × 22mA = 0.22W, so 0.4W provides safe margin for reliability.
• ✅ Mounting Type: 0603 (1608 Metric) surface-mount package meets the surface-mount requirement.
• ✅ Technology: Thick Film, as required.
• ✅ RoHS Compliance: ROHS3 Compliant.

Conclusion: All requirements are met or exceeded. This resistor is fully suitable for the application and provides safe, reliable operation for the red LED indicator circuit.