Automotive surge protection on a 12V bus
The 1.5SMC13AHE3/9AT: It clamps transients on a 12V nominal automotive bus — the 11.1V reverse standoff voltage sits below the rail, while the 12.4V minimum breakdown triggers before the downstream electronics see overvoltage. Peak clamp voltage is 18.2V at 82.4A pulse current, keeping the surge within the withstand of common 12V-rated ECUs and sensors.
Package and board-fit for DO-214AB
Single unidirectional channel — the cathode is tied to the protected rail, anode to ground. No power-line protection means it is intended for signal or low-side transient clamping, not for reverse-battery or alternator load-dump scenarios where a bidirectional TVS is required.
Active lifecycle and sourcing posture
For automotive programs requiring AEC-Q101 documentation, Vishay provides the standard PPAP level (typically Level 2/3) and RoHS compliance data through the product change notification system.