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STMicroelectronics SM6T12AY — Circuit Protection

STMicroelectronics SM6T12AY TVS Zener, 600W, AEC-Q101

MPNSM6T12AY
Active

STMicroelectronics SM6T12AY, Automotive AEC-Q101 Zener TVS diode, 600W peak pulse power, 10.2V reverse standoff, 11.4V breakdown min, 21.7V clamping max, 184A peak pulse current (8/20µs), DO-214AA SMB package, -55 to 150°C junction temp.

$0.7100Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SM6T12AY specifications
ParameterValue
TypeZener
SeriesAutomotive, AEC-Q101, SM6TY, TRANSIL™
MountingSurface Mount
Voltage - breakdown11.4V
Voltage - clamping (Max) @ ipp21.7V
Voltage - reverse standoff10.2V
Current - peak pulse (10/1000μs)184A (8/20µs)
Power - peak pulse600W
Power line protectionNo
Operating temperature-55°C~150°C(TJ)
PackageTape & Reel (TR); Cut Tape (CT)
ApplicationsAutomotive
CaseDO-214AA, SMB
Unidirectional channels1

Product details

600 W peak pulse — 12 V automotive rail protection

It carries AEC-Q101 qualification, so it is screened for the stress profiles of under-hood and chassis-domain electronics — thermal cycling, high-temperature reverse bias, and surge endurance.

Clamping window and surge current

Reverse standoff voltage is 10.2 V, so the diode stays out of conduction below that level — no leakage penalty on a nominal 12 V bus. Breakdown starts at a minimum of 11.4 V, and clamping is held to a maximum of 21.7 V at the rated peak pulse current of 184 A under the 8/20 µs waveform. That 184 A figure is the one to check against ISO 7637-2 pulse 5a/5b requirements for load-dump protection; the 8/20 µs shape is the standard for automotive transient generators. Operating junction temperature spans -55 to 150 °C, covering both cold-crank at -40 °C and under-hood heat soak above 125 °C.

Package and mounting — DO-214AA SMB

The SMB body is pick-and-place friendly and reflow-solderable. No through-hole staking or lead-forming — just a standard SMD placement step.

Frequently asked questions

Is SM6T12AY AEC-Q101 qualified for automotive use?

Yes, the SM6T12AY is part of the Automotive, AEC-Q101 series. It is suitable for under-hood and chassis-domain applications where the environment sees -55 to 150 °C junction temperatures.