5. Select a Resistor to Drive an LED

• ✅ Resistance: 470Ω matches the calculated requirement for 22mA through a 2V LED on a 12V supply.
• ✅ Tolerance: ±5% meets the requirement for current stability and brightness consistency.
• ✅ Power Rating: 0.333W (1/3W) equals the minimum required (0.33W).
      • Calculated dissipation: (12V-2V)×22mA = 0.22W – This is safely below the part's rating, providing a good safety margin for reliability.
• ✅ Mounting Type: Surface Mount (0603 package) is suitable for modern PCB assembly.
• ✅ Technology: Thick Film, which is acceptable as specified.
• ✅ RoHS Compliance: ROHS3 Compliant as required.

Summary:
All key specifications are met or exceeded. This resistor (Panasonic ERJ-PA3J471V) is suitable for your LED current limiting application and will provide reliable operation.