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STMicroelectronics SMBJ33A-TR — Circuit Protection

SMBJ33A-TR TVS Diode, 33V Standoff, 600W Peak Pulse

MPNSMBJ33A-TR
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STMicroelectronics SMBJ33A-TR, TRANSIL™ series, unidirectional TVS diode, 33V reverse standoff, 600W peak pulse power, DO-214AA (SMB) surface-mount package, -55 to 150°C junction temperature.

$0.4500Ref. price · indicative, final on quote
STMicroelectronics SMBJ33A-TR datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SMBJ33A-TR specifications
ParameterValue
TypeZener
SeriesSMBJ, TRANSIL™
MountingSurface Mount
Voltage - breakdown36.7V
Voltage - clamping (Max) @ ipp53.3V
Voltage - reverse standoff33V
Current - peak pulse (10/1000μs)11.8A
Power - peak pulse600W
Power line protectionNo
Operating temperature-55°C~150°C(TJ)
PackageTape & Reel (TR); Cut Tape (CT)
ApplicationsGeneral Purpose
CaseDO-214AA, SMB
Unidirectional channels1

Product details

The STMicroelectronics SMBJ33A-TR is a unidirectional transient voltage suppressor from the TRANSIL™ family, designed to clamp voltage spikes on a 33 V nominal rail. Its 600 W peak pulse power rating (10/1000 µs waveform) translates to an 11.8 A peak pulse current capability, with clamping held to 53.3 V maximum at that current. For a general-purpose protection diode, this power level covers the majority of industrial and telecom transient events — motor drive inductive kicks, hot-swap surges, and secondary lightning protection — without needing a larger footprint device.

Package and assembly fit

No power line protection feature is built in — this is a unidirectional clamp for signal or DC rail protection, not an AC line suppressor.

Frequently asked questions

Is SMBJ33A-TR equivalent to SMBJ33A?

Yes, SMBJ33A-TR is electrically identical to the base SMBJ33A — same 33 V standoff, same 600 W peak pulse rating, same DO-214AA package. The -TR suffix simply indicates Tape & Reel packaging for automated assembly. The datasheet covers both variants.