Clamping voltage and surge rating for 28 V rails
The 1.5KE30CAHE3_A/C: The 1500 W rating is the peak power the device absorbs in a single pulse — it is not continuous dissipation. For repetitive surges, derate based on the pulse train duty cycle and ambient temperature; the junction temperature range spans -55°C to 175°C.
AEC-Q101 qualification and automotive deployment
This part carries AEC-Q101 qualification, meaning it has passed the stress tests required for automotive-grade discrete semiconductors: temperature cycling, high-temperature reverse bias, and ESD robustness. The TransZorb series uses a glass-passivated junction in the DO-201AA axial package. The through-hole body handles the thermal pulse of a 1500 W surge better than a surface-mount equivalent of similar die size — the axial leads conduct heat into the PCB traces and the surrounding air.