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5. Select a Resistor to Drive an LED

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DigitalZoul
DigitalZoul
July 30, 2025
RMCF1210FT453R
Component
DigiKey Part NoRMCF1210FT453RTR-ND
Mfr Part NoRMCF1210FT453R
ManufacturerStackpole Electronics Inc

RES 453 OHM 1% 1/2W 1210

453 Ohms ±1% 0.5W, 1/2W Chip Resistor 1210 (3225 Metric) Automotive AEC-Q200 Thick Film

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EW

Response By EW AI

  • ✅ Resistance: 453Ω (selected) vs 470Ω (calculated)
    • This is within ±5% of 470Ω (allowed range: 446.5Ω to 493.5Ω).
    • Delivers ≈22.1mA current, very close to target.
  • ✅ Tolerance: ±1%
    • Superior to required ±5%, ensuring tighter current control.
  • ✅ Power Rating: 0.5W (1/2W)
    • Well above the required ≥0.33W. Calculated dissipation is ≈0.22W, so this rating provides ample margin for reliability.
  • ✅ Mounting Type: Surface Mount 1210 package
    • Fully meets surface mount requirement.
  • ✅ Technology: Thick Film
    • Matches the specified acceptable technologies.
  • ✅ RoHS Compliance: ROHS3 Compliant
    • Meets environmental requirement.
Conclusion: All requirements satisfied! The selected resistor (Stackpole RMCF1210FT453R) is suitable for your LED current limiting application.
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