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Littelfuse Inc. 1.5SMC24 — Circuit Protection

1.5SMC24 Littelfuse TVS Diode, 1500W, 20.5V Standoff

MPN1.5SMC24
Obsolete

Littelfuse Inc. 1.5SMC series Zener TVS diode, 1.5SMC24, 1500W peak pulse power, 20.5V standoff, 34.86V clamp, DO-214AB (SMC) surface mount, Tape & Reel.

$0.6200Ref. price · indicative, final on quote
Littelfuse Inc. 1.5SMC24 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

1.5SMC24 specifications
ParameterValue
TypeZener
Series1.5SMC
MountingSurface Mount
Voltage - breakdown21.6V
Voltage - clamping (Max) @ ipp34.86V
Voltage - reverse standoff20.5V
Current - peak pulse (10/1000μs)45.8A
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

The 1.5SMC24: The 20.5V reverse standoff voltage means the protected rail can run at 20.5V DC without the diode conducting; the 34.86V clamp voltage is the maximum the diode lets through during a transient — downstream components must survive that peak. With a 45.8A peak pulse current rating (10/1000µs), the diode can absorb substantial surge energy from lightning or inductive load dumps. The unidirectional channel (single) protects one polarity rail; for AC or bidirectional lines, two back-to-back or a bidirectional variant is needed.

Lifecycle reality — obsolete, sourced to order

Littelfuse lists the 1.5SMC24 as Obsolete.

Frequently asked questions

What is the closest pin-compatible alternative to 1.5SMC24?

A parametric search for a 1500W, 20.5V standoff, unidirectional TVS in DO-214AB may yield functional equivalents, but pinout and footprint should be verified against the board layout.