5. Select a Resistor to Drive an LED

• ✅ Resistance: 470 Ω matches the required value for 22mA through a 2V LED on 12V supply. (Calculation: (12V - 2V) / 22mA ≈ 455Ω; 470Ω is the nearest E24 value.)
• ✅ Tolerance: ±5% meets the requirement of ±5% or better.
• ✅ Power Rating: 0.5W exceeds the required minimum of 0.33W.
  Power dissipated: (22mA)² × 470Ω ≈ 0.23W, so a 0.5W resistor provides ample safety margin.
• ✅ Mounting Type: 0603 (1608 metric) is a surface-mount (SMD) package, as required.
• ✅ Technology: Thick film technology is specified and met.
• ✅ RoHS Compliance: ROHS3 Compliant, as required.

All key parameters (resistance, power, tolerance, mounting, technology, and RoHS) are a good fit for the application. This resistor will ensure safe operation and long-term reliability for your LED circuit.