The 1.5SMC91CAHE3/57T: The 1.5 kW peak pulse rating is a 10/1000 µs transient waveform — the same test condition ISO 7637-2 uses for automotive load-dump and surge pulses, so this figure maps directly to the protection budget in vehicle electrical systems.
AEC-Q101 qualification — what the standard actually certifies
TJ max of 150 °C covers the upper end of the automotive operating envelope; an engine-compartment module that runs at 125 °C junction still has 25 °C margin, which is the usual derating headroom automotive thermal engineers budget before the datasheet curves apply.
Package and board-integration facts
The supplier device package is SMCJ in DO-214AB — the same body as a standard SMC, which means the land pattern and solder joint geometry follow the JEDEC DO-214AB footprint; the TVS sits alongside input diodes and bulk capacitance on the protected rail side of the PCB. Surface-mount, supplied on tape and reel — pick-and-place compatible for high-volume assembly with the reflow profile matched to the SnAgCu solder paste window.