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Littelfuse Inc. 1.5SMB30A — Circuit Protection

Littelfuse 1.5SMB30A TVS Diode, 1500W, DO-214AA

MPN1.5SMB30A
Active

Littelfuse Inc. 1.5SMB series Zener TVS diode, 1.5SMB30A, 1500W peak pulse power, 25.6V reverse standoff, unidirectional, DO-214AA SMB package, Tape & Reel.

$0.6200Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

1.5SMB30A specifications
ParameterValue
TypeZener
Series1.5SMB
MountingSurface Mount
Voltage - breakdown28.5V
Voltage - clamping (Max) @ ipp53.5V
Voltage - reverse standoff25.6V
Current - peak pulse (10/1000μs)201.9A (8/20µs)
Power - peak pulse1500W (1.5kW)
Power line protectionNo
Operating temperature-65°C~150°C(TJ)
PackageTape & Reel (TR); Cut Tape (CT)
ApplicationsTelecom
CaseDO-214AA, SMB
Unidirectional channels1

Product details

Clamping voltage and peak current handling

The 1.5SMB30A: The reverse standoff voltage is 25.6 V, so the diode remains non-conductive under normal 24 V bus conditions. This clamping level is low enough to protect 30 V-rated silicon without exceeding its abs-max rating. The 1500 W rating at 10/1000 µs is the standard telecom surge waveform — a single strike at this energy level does not degrade the junction.

Package and board-level integration

Available in Tape & Reel (TR) or Cut Tape (CT) for both high-volume pick-and-place and prototype builds.