1500 W surge clamp for 8.55 V rails
The 1.5KE10AH: The 9.5 V minimum breakdown voltage gives a guard band: a 12 V battery line that sees a 10 V transient during cranking stays below the avalanche region, while a true surge above 9.5 V triggers the clamp. This is a unidirectional device — one channel per package, cathode band marked on the DO-201 axial body.
Automotive temperature and qualification envelope
The through-hole DO-201AA (DO-27 axial) package mounts into a 0.040-inch diameter hole on the PCB. The lead bend radius and body length follow the JEDEC outline; the cathode band orientation must match the silkscreen for unidirectional clamping.