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STMicroelectronics SM6T27A — Circuit Protection

STMicroelectronics SM6T27A TVS Diode, 600W, DO-214AA

MPNSM6T27A
Active

STMicroelectronics SM6T27A, TRANSIL™ series, TVS Zener diode, 600W peak pulse power, 23.1V standoff, 25.7V breakdown min, 48.3V clamping, DO-214AA SMB, -55°C to 150°C.

$0.5400Ref. price · indicative, final on quote
STMicroelectronics SM6T27A datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SM6T27A specifications
ParameterValue
TypeZener
SeriesSM6T, TRANSIL™
MountingSurface Mount
Voltage - breakdown25.7V
Voltage - clamping (Max) @ ipp48.3V
Voltage - reverse standoff23.1V
Current - peak pulse (10/1000μs)83A (8/20µs)
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

TVS diode for 24V rail protection

With a reverse standoff voltage of 23.1 V and a minimum breakdown voltage of 25.7 V, it is a natural fit for protecting 24 V nominal systems — think industrial sensors, PLC I/O modules, or automotive auxiliary supplies. The clamping voltage peaks at 48.3 V at the rated 83 A peak pulse current (8/20 µs waveform), which keeps downstream components inside their safe operating area during a surge event.

No power line protection is built in; this is a straight unidirectional clamp for signal or DC rail use.

For BOM planning, this removes the last-time-buy risk that haunts older TVS families.

Frequently asked questions

Is SM6T27A suitable for 24V systems?

Yes. With a reverse standoff voltage of 23.1 V and a breakdown minimum of 25.7 V, it is designed to protect 24 V nominal rails without conducting during normal operation.

What is the peak pulse power of SM6T27A?

The peak pulse power rating is 600 W for a 10/1000 µs waveform. This defines the maximum surge energy the diode can absorb in a single pulse.