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STMicroelectronics SMBJ15A-TR — Circuit Protection

STMicroelectronics SMBJ15A-TR TVS Diode, 600W

MPNSMBJ15A-TR
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STMicroelectronics SMBJ15A-TR, TRANSIL™ series, Zener TVS diode, 600W peak pulse power, unidirectional, 15V reverse standoff, 24.4V clamping, DO-214AA SMB surface mount, -55°C to 150°C.

$0.4700Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SMBJ15A-TR specifications
ParameterValue
TypeZener
SeriesSMBJ, TRANSIL™
MountingSurface Mount
Voltage - breakdown16.7V
Voltage - clamping (Max) @ ipp24.4V
Voltage - reverse standoff15V
Current - peak pulse (10/1000μs)25.1A
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

600W surge clamp for 15V rails

With a peak pulse power rating of 600W (10/1000µs waveform) and a clamping voltage of 24.4V at 25.1A, it handles the kind of surge you get from inductive load dumps or lightning-coupled events on a general-purpose board. The 16.7V minimum breakdown voltage gives a clean trigger threshold before the silicon starts conducting hard.

DO-214AA footprint and temperature range

The junction rating means derating applies above 25°C; at 150°C the peak pulse power drops per the datasheet curve, but for most 85°C-max designs the full 600W is available.

For BOM planning that means no forced redesign window and no premium for end-of-life stock.

Frequently asked questions

Is the SMBJ15A-TR unidirectional or bidirectional?

It is a unidirectional device — one channel, clamping in one polarity only. For bidirectional protection on AC lines or bipolar rails you would need two devices or a bidirectional variant from the SMBJ series.

What is the peak pulse power of SMBJ15A-TR?

600W peak pulse power per the 10/1000µs waveform. That is the headline surge rating — enough for most secondary-side protection on 15V supplies in industrial and telecom equipment.

Is SMBJ15A-TR RoHS compliant?

For formal compliance documentation, the datasheet or ST's RoHS declaration should be referenced.