The SMAJ33CAQ-13-F: The minimum breakdown voltage is 36.7 V, so a 33 V nominal rail sees no leakage until the transient exceeds that threshold — the device stays off during normal operation. At 7.5 A peak pulse current the clamp holds at 53.3 V max; a 48 V-rated downstream component on a 33 V bus has margin, but a 40 V-rated part would need a lower-voltage TVS or a series resistor to limit the clamp current.
Supplied in DO-214AC (SMA) package, surface-mount on Tape & Reel — the -13-F suffix denotes the 13-inch reel quantity for automated pick-and-place. The SMA footprint is shared across the SMAJ family, so a single PCB land pattern serves the full voltage range from 5 V to 188 V without layout changes.