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STMicroelectronics SM30T26CAY — Circuit Protection

STMicroelectronics SM30T26CAY TVS Diode, 3000W, AEC-Q101

MPNSM30T26CAY
Active

STMicroelectronics SM30T26CAY, Automotive AEC-Q101 TRANSIL™ bidirectional TVS diode, 3000W peak pulse power, 22V reverse standoff, 35.5V clamping, 84.5A peak pulse current, DO-214AB SMC package, -55°C to 175°C.

$1.5000Ref. price · indicative, final on quote
STMicroelectronics SM30T26CAY datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SM30T26CAY specifications
ParameterValue
TypeZener
SeriesAutomotive, AEC-Q101, SM30TY, TRANSIL™
MountingSurface Mount
Voltage - breakdown24.4V
Voltage - clamping (Max) @ ipp35.5V
Voltage - reverse standoff22V
Current - peak pulse (10/1000μs)84.5A
Power - peak pulse3000W (3kW)
Power line protectionNo
Operating temperature-55°C~175°C(TJ)
PackageTape & Reel (TR); Cut Tape (CT)
ApplicationsAutomotive
CaseDO-214AB, SMC
Bidirectional channels1

Product details

3000W peak pulse power — automotive-grade transient suppression

Its 3000W peak pulse power rating (10/1000µs waveform) handles load-dump and ISO 7637 transients common in 12V and 24V vehicle electrical systems. The 22V reverse standoff voltage protects 24V nominal rails, with a minimum breakdown of 24.4V and a maximum clamping voltage of 35.5V at the 84.5A peak pulse current. The single bidirectional channel clamps both positive and negative surges, reducing component count on the board.

AEC-Q101 and temperature range — qualified for under-hood and harsh environments

The SMC surface-mount package is standard for power TVS diodes, with a large copper pad for heat sinking during repetitive surge events.

Frequently asked questions

Is SM30T26CAY AEC-Q101 qualified?

Yes, the SM30T26CAY is part of the Automotive, AEC-Q101 series, qualified for automotive-grade applications.

Does SM30T26CAY come in a unidirectional version?

The SM30T26CAY is a bidirectional device with one channel. A unidirectional variant, SM30T26A, exists in the same family and package, offering polarity-specific clamping for applications that only need one-direction protection.