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onsemi SMF24AT1 — Circuit Protection

SMF24AT1 onsemi Zener TVS – Obsolete, 200W, 24V Standoff

MPNSMF24AT1
Obsolete

onsemi SMF24AT1, Zener TVS diode, 200W peak pulse power, 24V reverse standoff, unidirectional, SOD-123F surface-mount package

onsemi SMF24AT1 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

SMF24AT1 specifications
ParameterValue
TypeZener
MountingSurface Mount
Voltage - breakdown26.7V
Voltage - clamping (Max) @ ipp38.9V
Voltage - reverse standoff24V
Current - peak pulse (10/1000μs)5.1A
Power - peak pulse200W
Power line protectionNo
Operating temperature-55°C~150°C(TJ)
PackageTape & Reel (TR)
ApplicationsGeneral Purpose
CaseSOD-123F
Unidirectional channels1

Product details

Available through independent distribution on a quoted-to-order basis. Quantities are lot-specific; availability and pricing confirmed at RFQ.

200W peak pulse in a SOD-123F footprint

Clamps at 38.9V max with a 5.1A peak pulse current. Reverse standoff voltage of 24V means it starts conducting above a 24V rail — suited for 24V DC buses in industrial or telecom gear where transients ride on the supply. Housed in a SOD-123F surface-mount package. The small footprint suits high-density PCB layouts, but the 200W rating limits it to secondary-side or low-energy transient suppression — not primary mains protection.

This covers automotive under-hood, outdoor telecom cabinets, and industrial floor applications where the ambient swings wide.

Frequently asked questions

What is the replacement for SMF24AT1?

No official successor is listed by onsemi for the SMF24AT1. For a functionally equivalent Zener TVS in the same SOD-123F package with a 24V standoff and 200W peak pulse rating, consider the SMF24A series from other manufacturers — confirm the breakdown voltage and clamping specs match your BOM requirements.

What is the peak power of SMF24AT1?

Rated for 200W peak pulse power dissipation under a 10/1000 µs waveform. The clamping voltage at that pulse is 38.9V max with a peak pulse current of 5.1A.