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.