Clamping voltage and pulse current — sizing the protection margin
The 1.5KE100AHA0G: The 11.4A peak pulse current rating at the 10/1000µs test waveform defines the surge capability: a 1500W device absorbing a transient at the clamping voltage delivers that current into the load, and the junction must stay within the 175°C limit for the pulse duration.
DO-201 axial package — board integration and thermal path
Housed in a DO-201AA (DO-27) axial-lead through-hole package, the 1.5KE100AHA0G mounts with the body off the board — the lead length and copper trace area on the PCB set the thermal resistance for repetitive pulse trains, not just the single-pulse rating. The through-hole format suits point-to-point wiring on terminal strips or PCB layouts where the diode sits between the incoming supply and the protected circuit, with the cathode band marking the unidirectional orientation.