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28. Relay Flyback Diode Selection

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S1J-FDIDKR-ND
Component
DigiKey Part NoS1J-FDITR-ND
Mfr Part NoS1J-13-F
ManufacturerDiodes Incorporated

DIODE STANDARD 600V 1A SMA

Diode 600 V 1A Surface Mount SMA

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EW

Response By EW AI

✅ Component type/application: This is a single rectifier diode and is suitable for flyback protection across a 12V relay coil.
✅ Diode type: Standard rectifier / general purpose rectifier (Technology: Standard).
✅ Average rectified current: 1A, which meets the ≥1A requirement and is well above the 80 mA relay coil current.
✅ Repetitive reverse voltage: 600V, which exceeds the ≥40V requirement.
✅ Package: SMA (DO-214AC, SMA), matches the required SMA package.
✅ Mounting type: Surface Mount, matches requirement.
✅ Operating temperature range: -65°C to +150°C junction, which is wider than the required -40°C to +125°C.
✅ RoHS compliance: Yes, listed as ROHS3 Compliant.

All required specifications are satisfied. This diode is approved for the relay flyback protection application.
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