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onsemi 1.5SMC43AT3 — Circuit Protection

1.5SMC43AT3 onsemi Zener TVS – 1500W, 36.8V Standoff

MPN1.5SMC43AT3
Obsolete

onsemi 1.5SMC43AT3, Zener TVS diode, 1500W peak pulse power, 36.8V reverse standoff, 59.3V clamping, DO-214AB SMC, single unidirectional channel.

$0.5800Ref. price · indicative, final on quote
onsemi 1.5SMC43AT3 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

1.5SMC43AT3 specifications
ParameterValue
TypeZener
MountingSurface Mount
Voltage - breakdown40.9V
Voltage - clamping (Max) @ ipp59.3V
Voltage - reverse standoff36.8V
Current - peak pulse (10/1000μs)25.3A
Power - peak pulse1500W (1.5kW)
Power line protectionNo
Operating temperature-65°C~150°C(TJ)
PackageTape & Reel (TR); Cut Tape (CT)
ApplicationsGeneral Purpose
CaseDO-214AB, SMC
Unidirectional channels1

Product details

Zener TVS for 36.8 V rail protection

The 1.5SMC43AT3 is a single-channel unidirectional Zener TVS diode from onsemi, designed to clamp transients on a 36.8 V nominal rail (reverse standoff voltage) to a maximum of 59.3 V at the peak pulse current of 25.3 A (10/1000 µs waveform).

The minimum breakdown voltage is 40.9 V. The clamping voltage at 25.3 A is 59.3 V.

Obsolete — sourcing and replacement planning

onsemi has marked the 1.5SMC43AT3 as Obsolete. For a BOM line that must stay active, a parametric cross-search within the 1.5SMC series for a 36.8 V standoff Zener TVS is the first step.

Frequently asked questions

How can I order 1.5SMC43AT3 or check stock?

The 1.5SMC43AT3 is obsolete per onsemi. Submit an RFQ with your target quantity; we source and quote to order. Availability and pricing are confirmed at quote time — no stock-holding claim.

Is 1.5SMC43AT3 obsolete?

Yes, onsemi lists the 1.5SMC43AT3 as Obsolete. No official replacement part number is published. For a drop-in alternative, search the 1.5SMC series for a 36.8 V standoff, 1500 W Zener TVS in DO-214AB.