What the 1500W rating means for your protection budget
The 1.5KE350AHA0G: For a 300V nominal rail, the 482V clamping voltage means a downstream device rated at 500V or higher stays within its safe operating area during a surge event.
AEC-Q101 qualification certifies the part for automotive stress levels — temperature cycling, high-temperature reverse bias, and ESD robustness per the automotive discrete semiconductor standard.
The 3.2A peak pulse current at the clamping voltage is carried through the lead frame; board layout should keep the trace width from the anode to the protected rail at least as wide as the lead diameter to avoid a secondary fuse effect.
Sourcing and lifecycle posture
No official second-source cross-reference is published, but the 1.5KE series footprint is shared by multiple TVS diode manufacturers for alternative sourcing evaluation.