Skip to main content
Log in
STMicroelectronics SM15T82CAY — Circuit Protection

STMicroelectronics SM15T82CAY TVS Diode, 1500W, AEC-Q101

MPNSM15T82CAY
Active

STMicroelectronics SM15T82CAY, Automotive AEC-Q101 Zener TVS Diode, 1500W Peak Pulse Power, 70V Reverse Standoff, Bidirectional, DO-214AB SMC Package.

$1.0600Ref. price · indicative, final on quote
STMicroelectronics SM15T82CAY datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SM15T82CAY specifications
ParameterValue
TypeZener
SeriesAutomotive, AEC-Q101, SM15TY, TRANSIL™
MountingSurface Mount
Voltage - breakdown77.8V
Voltage - clamping (Max) @ ipp146V
Voltage - reverse standoff70V
Current - peak pulse (10/1000μs)69A (8/20µs)
Power - peak pulse1500W (1.5kW)
Power line protectionNo
Operating temperature-40°C~150°C(TJ)
PackageTape & Reel (TR); Cut Tape (CT)
ApplicationsAutomotive
CaseDO-214AB, SMC
Bidirectional channels1

Product details

What this TVS protects and where it lives

1500 W peak pulse — sizing the protection margin

For a 70 V rail, the clamping voltage of 146 V means the device will hold the line during a 69 A peak pulse current event (8/20 µs waveform). That margin matters when protecting sensitive ECUs or sensor modules from load-dump spikes that can exceed 100 V.

The base product number SM15T82 covers the unidirectional and bidirectional variants in the same SMC footprint, so a board designed for the SM15T82CAY can also accept the SM15T82A (unidirectional) if the circuit later requires polarity-specific clamping.

DO-214AB SMC — footprint and assembly

No power line protection is built in — this is a transient suppressor, not a regulator — so the design must still include appropriate input filtering and overcurrent protection upstream.

Frequently asked questions

What is the closest pin-compatible alternative to SM15T82CAY in this component family?

Within the SM15TY TRANSIL™ series, the unidirectional SM15T82A shares the same DO-214AB footprint and 70 V standoff voltage, differing only in polarity. For a bidirectional part with a different standoff, the SM15T33CAY (33 V) or SM15T100CAY (100 V) are in the same package and qualification grade.

What compliance documentation does this brand provide for SM15T82CAY?

As an AEC-Q101 qualified part from STMicroelectronics, the SM15T82CAY is supported by a full datasheet, RoHS and REACH compliance declarations, and AEC-Q101 test reports. These documents are typically available from the manufacturer or through the distributor upon request.