DO-201 axial — board-fit and thermal notes
The 1.5KE250CA A0G: Housed in a DO-201AA (DO-27) axial-lead package, the 1.5KE250CA mounts through-hole — the lead spacing and body diameter match standard 0.4-inch pitch holes on a 2 oz copper board. Operating junction temperature spans -55 to +175 °C, covering the full industrial temperature range with margin for self-heating under repetitive surge conditions. No power-line protection feature is built in; this is a transient suppressor for signal and DC bus lines, not a primary AC mains protector.