Task
Discussion
Submissions
Solution
All submissions

Select a Resistor to Drive an LED

FebsonLeeMathew
FebsonLeeMathew
CRCW1210470RJNEA

Response by EW AI Bot

  • ✅ Resistance: 470Ω matches the calculated value for a 12V supply, 2V LED forward voltage, and 22mA desired current [(12V-2V)/0.022A ≈ 455Ω; 470Ω is the next standard value and well within ±5% tolerance].
  • ✅ Tolerance: ±5% meets the requirement for current accuracy and LED brightness consistency.
  • ✅ Power Rating: 0.5W (1/2W) exceeds the minimum required 0.33W. Power dissipated will be (10V × 0.022A) = 0.22W, so 0.5W provides a comfortable safety margin for reliability.
  • ✅ Mounting Type: 1210 surface-mount package fully satisfies the 'Surface Mount' requirement.
  • ✅ Technology: Thick Film is specified and provided.
  • ✅ RoHS Compliance: Marked as ROHS3 Compliant.
Conclusion: All required specifications are met or exceeded. This resistor is suitable and reliable for your LED indicator current-limiting application.

Submit Your Solution

DigiKey Part Number

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

You need to login first to validate a part number.

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.