Device identity and key parametrics
The 1.5KE36CH: AEC-Q101 qualification places this part in the automotive-grade bin: it has passed the extended reliability stress tests (temperature cycling, HTRB, H3TRB) required for under-hood and chassis-mounted electronics.
Protection window and board-fit
The reverse standoff voltage is 29.1V — the rail it protects must never exceed this in normal operation. Breakdown occurs at 32.4V minimum, and clamping is at 52V maximum. For a 24V automotive battery line that sees nominal 28.8V during alternator charging, this part holds off the steady-state voltage and only conducts during a load-dump or inductive kick transient. The DO-201AA axial package is a through-hole form factor with a 0.052-inch lead diameter, compatible with standard 1.0mm PCB holes. The 1500W peak pulse rating is derated linearly above 25°C; at 175°C the derated capability is approximately 25% of the 25°C rating, so thermal management on the PCB (copper area, airflow) matters when the part is repeatedly stressed near its limit.