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Vishay General Semiconductor - Diodes Division 1.5SMC51AHM3/I — Circuit Protection

1.5SMC51AHM3/I Vishay TVS, 1500W, 43.6V, DO-214AB

MPN1.5SMC51AHM3/I
Active

Vishay General Semiconductor - Diodes Division, Automotive AEC-Q101 1.5SMC TransZorb® series, Zener TVS diode, 1500W peak pulse power, 43.6V reverse standoff, 70.1V clamping, DO-214AB SMC package, Tape & Reel.

Vishay General Semiconductor - Diodes Division 1.5SMC51AHM3/I datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

1.5SMC51AHM3/I specifications
ParameterValue
TypeZener
SeriesAutomotive, AEC-Q101, 1.5SMC, TransZorb®
MountingSurface Mount
Voltage - breakdown48.5V
Voltage - clamping (Max) @ ipp70.1V
Voltage - reverse standoff43.6V
Current - peak pulse (10/1000μs)21.4A
Power - peak pulse1500W (1.5kW)
Power line protectionNo
Operating temperature-65°C~150°C(TJ)
PackageTape & Reel (TR)
ApplicationsAutomotive, Telecom
CaseDO-214AB, SMC
Unidirectional channels1

Product details

Automotive-grade transient suppression

The 1.5SMC51AHM3/I is a Zener TVS diode from Vishay's 1.5SMC series, qualified to AEC-Q101 for automotive applications. The single unidirectional channel protects a single 43.6V nominal rail against inductive load dumps and ISO 7637-2 transients common in automotive 24V systems.

The package footprint is standard for the 1.5SMC series, allowing direct drop-in replacement for other 1500W TVS diodes in the same case. Supplied on Tape & Reel, the part is ready for automated pick-and-place assembly. No power line protection is provided — this is a signal or low-power rail clamp, not a mains input protector.

Sourcing is through authorized distribution channels and independent surplus inventory. The date-code and lot traceability are maintained — the laser etch on the DO-214AB body should match Vishay's plant and week code format for the procurement lot.

Frequently asked questions

What is the closest pin-compatible alternative to 1.5SMC51AHM3/I?

Any 1500W TVS diode in the DO-214AB (SMC) package with a 43.6V reverse standoff and unidirectional configuration is a functional equivalent. The 1.5SMC series from Vishay includes the base part 1.5SMC51A (non-automotive grade) — the HM3/I suffix denotes AEC-Q101 qualification. A pin-compatible automotive-grade alternative would need the same package, standoff voltage, and peak pulse power rating.

What compliance documentation does Vishay provide for 1.5SMC51AHM3/I?

Vishay provides RoHS and REACH compliance documentation for the 1.5SMC51AHM3/I. The part is also AEC-Q101 qualified, meaning it meets automotive reliability stress and PPAP requirements. No UL or IEC certification is listed in the available specifications.