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STMicroelectronics SM6T30CAY — Circuit Protection

STMicroelectronics SM6T30CAY TVS Diode, 600W, AEC-Q101

MPNSM6T30CAY
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STMicroelectronics SM6T30CAY, TRANSIL™ series, bidirectional TVS diode, 600W peak pulse power, 28.5V min breakdown, 53.5V clamping, DO-214AA (SMB) package, AEC-Q101 qualified.

$0.7000Ref. price · indicative, final on quote
STMicroelectronics SM6T30CAY datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SM6T30CAY specifications
ParameterValue
TypeZener
SeriesAutomotive, AEC-Q101, SM6TY, TRANSIL™
MountingSurface Mount
Voltage - breakdown28.5V
Voltage - clamping (Max) @ ipp53.5V
Voltage - reverse standoff25.6V
Current - peak pulse (10/1000μs)75A (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
Bidirectional channels1

Product details

600W automotive TVS for 24V rail protection

The STMicroelectronics SM6T30CAY is a bidirectional Zener-type TVS diode from the TRANSIL™ series, purpose-built for automotive transient protection. It delivers 600W peak pulse power (10/1000µs waveform) and clamps a 25.6V reverse standoff to 53.5V maximum at the rated peak pulse current of 75A (8/20µs waveform). The 28.5V minimum breakdown voltage ensures the part stays out of conduction during normal 24V bus operation.

AEC-Q101 qualification and operating range

Power line protection is not implemented (no internal series element), so this is a shunt-only clamp for signal or low-impedance power rails.

Frequently asked questions

Does SM6T30CAY meet automotive grade AEC-Q101?

Yes, the SM6T30CAY is listed as Automotive, AEC-Q101 qualified, part of the SM6TY and TRANSIL™ series.

What is the peak pulse power and breakdown voltage of SM6T30CAY?

The SM6T30CAY is rated for 600W peak pulse power (10/1000µs waveform). Its minimum breakdown voltage is 28.5V, with a maximum clamping voltage of 53.5V at the rated peak pulse current of 75A (8/20µs waveform). The reverse standoff voltage is 25.6V typical.

Is SM6T30CAY a direct replacement for SM6T30CA?

The SM6T30CAY is the automotive-grade (AEC-Q101 qualified) version of the SM6T30CA. Both share the same DO-214AA (SMB) package, 600W peak pulse power rating, and breakdown/clamping voltage specifications. The 'Y' suffix indicates the automotive qualification. For non-automotive applications, the SM6T30CA may be a cost-effective alternative; for automotive designs, the SM6T30CAY is the correct choice.