600W automotive TVS in a standard SMB footprint
It protects a single line with a 64.1V reverse standoff voltage and clamps transients to 134V maximum at the peak pulse current.
Clamping voltage and pulse current — sizing the protection
The 134V clamping voltage at the 30A (8/20µs waveform) peak pulse current sets the upper limit the protected circuitry must survive. For a 12V automotive rail, the 64.1V standoff gives enough headroom above normal battery voltage including load dump transients.
AEC-Q101 and the automotive supply chain
The active lifecycle status confirms STMicroelectronics continues to manufacture the SM6T75AY with no end-of-life notice.