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STMicroelectronics SM30T10CAY — Circuit Protection

STMicroelectronics SM30T10CAY Automotive TVS Diode, 3kW

MPNSM30T10CAY
Active

STMicroelectronics SM30T10CAY, Automotive AEC-Q101 TRANSIL™ TVS, bidirectional, 8.5V standoff, 14.4V clamp at 208A, 3kW peak pulse power, DO-214AB SMC, -55°C to 175°C.

$0.7417Ref. price · indicative, final on quote
STMicroelectronics SM30T10CAY datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SM30T10CAY specifications
ParameterValue
TypeZener
SeriesAutomotive, AEC-Q101, SM30TY, TRANSIL™
MountingSurface Mount
Voltage - breakdown9.5V
Voltage - clamping (Max) @ ipp14.4V
Voltage - reverse standoff8.5V
Current - peak pulse (10/1000μs)208A
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

3kW peak pulse power — sizing the clamp for load-dump survival

It handles 3000W (3kW) peak pulse power per the 10/1000µs waveform, with a clamping voltage of 14.4V at 208A peak pulse current. The 8.5V reverse standoff voltage means it stays out of the way on a nominal 12V automotive rail while clamping fast when a load-dump or inductive kick hits.

Bidirectional single-channel — one device per line, no polarity worry

With one bidirectional channel, this part protects a single signal or power line against both positive and negative transients. No need to orient the device on the board — it clamps equally in both directions.

No power line protection (no internal series element) — this is a pure shunt clamp, meaning it shunts surge energy to ground, not a regulator or filter.

Frequently asked questions

Is SM30T10CAY RoHS compliant and lead-free?

The SM30T10CAY is listed as RoHS compliant and lead-free per the STMicroelectronics product status. No RoHS exemption flags are noted on this part.

Does SM30T10CAY replace SM30T10?

The SM30T10CAY is a bidirectional variant of the SM30T10 base product number. The 'C' in the suffix typically denotes bidirectional versus unidirectional. Check the base product number SM30T10 for the unidirectional version if your design requires polarity-specific clamping.