Clamping voltage and rail protection for a 28.2 V nominal bus
The 1.5KE33AHB0G: The 28.2 V reverse standoff voltage means it sits across a 24 V nominal rail without conducting in normal operation, only turning on when the transient exceeds the 31.4 V minimum breakdown threshold.
AEC-Q101 is the automotive discrete semiconductor qualification standard. The Automotive grade flag means this TVS is intended for under-hood or chassis-domain electronic modules where the ambient temperature and vibration profile exceed industrial limits.
The 34 A peak pulse current at the clamping voltage gives the system designer a direct number for fuse coordination and PCB trace width budgeting. Power line protection is not supported — this is a unidirectional device for signal or DC rail clamping, not AC mains.
Through-hole DO-201AA axial package — board integration
The DO-201AA (DO-27) axial-lead package is a through-hole form factor that mounts into plated through-holes on a PCB or terminal block. The axial leads handle the thermal cycling of the junction during repeated surge events better than a surface-mount package of equivalent power rating, because the lead frame conducts heat into the board copper and the air around the body.