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Littelfuse Inc. 1.5SMC20A — Circuit Protection

1.5SMC20A Littelfuse TVS Diode, 1500W, 17.1V Standoff

MPN1.5SMC20A
Active

Littelfuse Inc. 1.5SMC series Zener TVS, 1.5SMC20A, 1500W peak pulse power, 17.1V reverse standoff, 27.7V clamping, 54.9A Ipp, DO-214AB (SMC) surface mount.

$0.6200Ref. price · indicative, final on quote
Littelfuse Inc. 1.5SMC20A datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

1.5SMC20A specifications
ParameterValue
TypeZener
Series1.5SMC
MountingSurface Mount
Voltage - breakdown19V
Voltage - clamping (Max) @ ipp27.7V
Voltage - reverse standoff17.1V
Current - peak pulse (10/1000μs)54.9A
Power - peak pulse1500W (1.5kW)
Power line protectionNo
Operating temperature-55°C~150°C(TJ)
PackageTape & Reel (TR); Cut Tape (CT)
ApplicationsGeneral Purpose
CaseDO-214AB, SMC
Unidirectional channels1

Product details

1500W Zener TVS for 17.1V rail protection

The 1.5SMC20A: The 19V minimum breakdown voltage means it starts conducting just above the working voltage, and the 27.7V max clamping at 54.9A (10/1000µs waveform) defines the maximum voltage the protected circuitry will see during a surge. This is a unidirectional device (one channel), so it protects a single line against positive-going transients relative to ground.

DO-214AB (SMC) footprint and temp range

Packaged in the standard DO-214AB (SMC) surface-mount case, the 1.5SMC20A fits the same footprint as the SMCJ family. Available in Tape & Reel (TR) for high-volume pick-and-place, or Cut Tape (CT) for prototyping and small-batch builds. No power line protection feature is claimed — this is a general-purpose transient suppressor, not a specialized rail clamp for DC power buses.

Frequently asked questions

What package does the 1.5SMC20A come in?

It is supplied in the DO-214AB (SMC) surface-mount package, also referred to as SMCJ.