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STMicroelectronics SM15T10CAY — Circuit Protection

STMicroelectronics SM15T10CAY TVS Diode, 1500W, AEC-Q101

MPNSM15T10CAY
Active

STMicroelectronics SM15T10CAY, Automotive AEC-Q101 TRANSIL™ TVS, Zener, 1500W peak pulse, 8.55V reverse standoff, 18.6V clamping, DO-214AB SMC, -40°C to 150°C.

$1.0600Ref. price · indicative, final on quote
STMicroelectronics SM15T10CAY datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SM15T10CAY specifications
ParameterValue
TypeZener
SeriesAutomotive, AEC-Q101, SM15TY, TRANSIL™
MountingSurface Mount
Voltage - breakdown9.5V
Voltage - clamping (Max) @ ipp18.6V
Voltage - reverse standoff8.55V
Current - peak pulse (10/1000μs)538A (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 transient suppressor for 12V rails

Rated for 1500W peak pulse power (10/1000µs waveform) with a reverse standoff voltage of 8.55V and a clamping voltage of 18.6V at 538A peak pulse current (8/20µs), it protects sensitive electronics like ECUs, sensors, and infotainment modules from load-dump, inductive kickback, and ESD events.

For a 12V automotive rail, the 8.55V reverse standoff ensures the TVS does not conduct during normal operation, while the 18.6V clamping voltage limits the spike seen by downstream components. The 538A peak pulse current (8/20µs) confirms it can handle the high-energy surges typical of load-dump scenarios per ISO 7637-2 pulse 5a. This combination means the SM15T10CAY is sized for moderate-power bus protection — not the main alternator feed, but distribution nodes and module inputs where 1500W of clamping headroom is sufficient.

The SM15T10CAY is housed in a DO-214AB (SMC) package, a surface-mount footprint common for medium-power TVS diodes. The SMC body handles the thermal dissipation of a 1500W pulse without requiring an external heatsink, relying on the PCB copper pour and solder joint for heat sinking.

Frequently asked questions

Is SM15T10CAY RoHS compliant?

The SM15T10CAY is listed as RoHS compliant. The DO-214AB SMC package is lead-free and compatible with lead-free soldering processes.

What is the difference between SM15T10CAY and SM15T10A?

The SM15T10CAY is a bidirectional TVS (one device protects both polarities), while the SM15T10A is a unidirectional version (cathode band). Both share the same 1500W peak pulse power, 8.55V reverse standoff, and 18.6V clamping voltage, but the bidirectional variant is typically used on AC-coupled or floating lines where the signal swings both positive and negative relative to ground.