Clamping and breakdown margins for 256 V rail protection
The 1.5KE300CAHB0G: The 256 V reverse standoff (working voltage) means the TVS draws negligible leakage below that level. Breakdown occurs at a minimum of 285 V, and the clamping voltage is capped at 414 V — this margin protects downstream components rated for 400 V or higher from transients like load dump or inductive kickback on a 256 V nominal bus.
Through-hole DO-201 package and temperature range
Housed in a DO-201AA (DO-27) axial leaded package, the 1.5KE300CAHB0G mounts through-hole — typical for high-reliability automotive or industrial boards where vibration resistance and replaceability matter. The operating junction temperature range spans -55°C to 175°C, covering under-hood and engine-bay thermal profiles.