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Littelfuse Inc. 1.5SMC33 — Circuit Protection

1.5SMC33 Littelfuse TVS Diode, 1500W, DO-214AB

MPN1.5SMC33
Obsolete

Littelfuse Inc. 1.5SMC series Zener TVS diode, 1.5SMC33, 1500W peak pulse power, 28.2V reverse standoff, 47.99V clamping, DO-214AB SMC, Tape & Reel.

$0.6500Ref. price · indicative, final on quote
Littelfuse Inc. 1.5SMC33 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

1.5SMC33 specifications
ParameterValue
TypeZener
Series1.5SMC
MountingSurface Mount
Voltage - breakdown29.75V
Voltage - clamping (Max) @ ipp47.99V
Voltage - reverse standoff28.2V
Current - peak pulse (10/1000μs)33.3A
Power - peak pulse1500W (1.5kW)
Power line protectionNo
Operating temperature-55°C~150°C(TJ)
PackageTape & Reel (TR)
ApplicationsGeneral Purpose
CaseDO-214AB, SMC
Unidirectional channels1

Product details

TVS diode for 28 V rails — 1500 W pulse handling

The 1.5SMC33: Its 28.2 V reverse standoff voltage makes it a direct fit for protecting 24 VDC or 28 VDC power rails from transients up to 47.99 V clamping.

With a breakdown voltage range starting at 29.75 V and clamping at 47.99 V (max) at the rated peak pulse current of 33.3 A, this diode absorbs surge energy before it reaches downstream silicon.

The SMC footprint is shared by many TVS diodes in the 1500 W class, so a board layout designed for this package can accept pin-to-pin alternatives from other manufacturers — but confirm the standoff voltage and polarity before substituting.

Frequently asked questions

What is the closest pin-compatible alternative to the 1.5SMC33?

Many manufacturers offer 1500 W TVS diodes in the DO-214AB package with similar standoff voltages, but each must be verified for breakdown and clamping specs before substitution.