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STMicroelectronics SM15T75CAY — Circuit Protection

STMicroelectronics SM15T75CAY TVS Diode, 1500W, AEC-Q101

MPNSM15T75CAY
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STMicroelectronics SM15T75CAY, Automotive AEC-Q101 TRANSIL™ bidirectional Zener TVS diode, 1500W peak pulse power, 134V clamping, 64.1V standoff, DO-214AB SMC package.

$1.0600Ref. price · indicative, final on quote
STMicroelectronics SM15T75CAY datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SM15T75CAY specifications
ParameterValue
TypeZener
SeriesAutomotive, AEC-Q101, SM15TY, TRANSIL™
MountingSurface Mount
Voltage - breakdown71.3V
Voltage - clamping (Max) @ ipp134V
Voltage - reverse standoff64.1V
Current - peak pulse (10/1000μs)75A (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

Automotive-grade bidirectional transient suppressor for 64V rails

With a reverse standoff voltage of 64.1V and a maximum clamping voltage of 134V at 75A (8/20µs waveform), it protects 60V nominal automotive power rails from load-dump, inductive kickback, and ISO 7637 transients.

What AEC-Q101 grade-1 means for your BOM

Capable is not qualified — this part has the PPAP-ready documentation an OEM tier-1 supplier must present during an audit. The bidirectional configuration protects against both positive and negative transients on a single 64.1V rail without needing two diodes back-to-back, saving board area in space-constrained ECU, BCM, and sensor-module layouts.

For production programs that require a second-source hedge, the SM15TY series includes other bidirectional 1500W variants at different standoff voltages, but the 64.1V / 134V clamp combination is specific to this order code.

Frequently asked questions

Does SM15T75CAY meet AEC-Q101 standard?

Yes, the SM15T75CAY is explicitly AEC-Q101 qualified as part of the Automotive SM15TY TRANSIL™ series, making it suitable for automotive applications requiring PPAP documentation.

Is SM15T75CAY a suitable replacement for SM15T75A?

The SM15T75CAY is the bidirectional version of the SM15T75A unidirectional part. If the circuit requires protection against both positive and negative transients on the same line, the CAY variant is the correct choice. The breakdown and clamping voltages are identical between the two.