What the AEC-Q101 grade means for a 12 V automotive bus
The SMAJ13AQ-13-F: With a 13 V reverse standoff voltage (V_RWM) and a minimum breakdown of 14.4 V, it protects a nominal 12 V rail without conducting during normal operation, clamping transients to 21.5 V at the 18.6 A peak pulse current (10/1000 µs waveform).
Surge rating and clamping performance
No power line protection (bidirectional) — the unidirectional design is intended for DC power rails where the cathode is tied to the positive bus and the anode to ground, clamping only positive overvoltage events.
Package and board integration
Surface-mount assembly with tape-and-reel packaging for automated pick-and-place.
