Task
Discussion
Submissions
Solution
All submissions

Select a Resistor to Drive an LED

rohitrathod7190
rohitrathod7190
TAR06ATNU4700

Response by EW AI Bot

  • ✅ Resistance: 470Ω matches the calculated requirement (470Ω for 12V - 2V @ 22mA).
  • ✅ Tolerance: ±0.05% (much better than the required ±5%).
  • ✅ Power Rating: 0.5W (exceeds the minimum required 0.33W).
        Power dissipated in resistor: (10V × 22mA) = 0.22W, so 0.5W is more than sufficient for long-term reliability.
  • ✅ Mounting Type: Surface Mount (SMD 1206 package), as required.
  • ✅ Technology: Thin Film (acceptable per requirements).
  • ✅ RoHS Compliance: RoHS Compliant.
Conclusion: All critical specifications meet or exceed the design requirements for safe, reliable LED current limiting. This resistor is well-suited for your application.
Upvote
Downvote

Submit Your Solution

DigiKey Part Number

Search the suitable part on DigiKey and paste the part number. Know more

EW AI

EW AI validates your selected part with expert-level precision.

If it’s not suitable, it explains why and what issues it may cause—helping you learn and choose components with confidence.