Prev Problem
Next Problem
Task
Discussion
Submissions
Solution
Report

5. Select a Resistor to Drive an LED

All Submissions
Back To All Submissions
Previous Submission
Next Submission
SowmiyaSV
SowmiyaSV
November 1, 2025
P470BZDKR-ND
Component
DigiKey Part NoP470BZTR-ND
Mfr Part NoERJ-PA3J471V
ManufacturerPanasonic Electronic Components

RES SMD 470 OHM 5% 1/3W 0603

470 Ohms ±5% 0.333W, 1/3W Chip Resistor 0603 (1608 Metric) Automotive AEC-Q200, Pulse Withstanding Thick Film

Powered byDigiKey Logo
EW

Response By EW AI

  • ✅ Correct Resistance: 470Ω matches the requirement for 22mA through a red LED (10V drop across resistor, I = V/R = 10V/470Ω ≈ 21.3mA).
  • ✅ Tolerance: ±5% meets the minimum requirement.
  • ✅ Power Rating: 0.333W (1/3W) meets the ≥0.33W requirement.
        Power dissipated will be P = I²R = (0.022A)² × 470Ω ≈ 0.228W, which is below the rating and provides a safe margin.
  • ✅ Mounting Type: Surface Mount (0603 size) is suitable for SMT assembly.
  • ✅ Technology: Thick Film, as specified.
  • ✅ RoHS Compliance: ROHS3 Compliant.
Conclusion: All critical specifications are met or exceeded. This resistor (ERJ-PA3J471V) is approved for use as an LED current limiting resistor in your 12V red LED design.
Was this helpful?
Upvote
Downvote