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
krishnabhosale
krishnabhosale
December 25, 2025
SG73G2BTTD4700C
Component
DigiKey Part No2019-SG73G2BTTD4700CTR-ND
Mfr Part NoSG73G2BTTD4700C
ManufacturerKOA Speer Electronics, Inc.

RES 470 OHM 0.25% 1/2W 1206

470 Ohms ±0.25% 0.5W, 1/2W Chip Resistor 1206 (3216 Metric) Automotive AEC-Q200, Moisture Resistant, Pulse Withstanding Thick Film

Powered byDigiKey Logo
EW

Response By EW AI

  • ✅ Resistance: 470Ω (matches calculated requirement of 470Ω for 22mA @ 12V-2V LED drop)
  • ✅ Tolerance: ±0.25% (meets and exceeds the requirement of ±5% or better; tighter tolerance improves consistency)
  • ✅ Power Rating: 0.5W (exceeds the minimum required 0.33W; calculated dissipation is (12V-2V)^2/470Ω ≈ 0.234W, so 0.5W ensures reliability and margin)
  • ✅ Mounting Type: Surface Mount (1206 package, suitable for SMT PCB assembly)
  • ✅ Technology: Thick Film (matches requirement for thick or thin film)
  • ✅ RoHS Compliance: Yes (ROHS3 Compliant—meets environmental requirements)
Summary: All key specifications are matched or exceeded. This resistor is highly suitable for your 12V LED current limiting application.
Was this helpful?
Upvote
Downvote