Surge rating and protection threshold
The 1.5KE110A-TP: Breakdown occurs at a minimum of 105V, so the device stays transparent below that threshold and only conducts when the transient exceeds the normal operating voltage.
Package and thermal envelope
Housed in a DO-201AE axial leaded package, the 1.5KE110A-TP is a through-hole component suited for board-level mounting where the leads pass through plated holes and are soldered on the opposite side. The package body itself is the thermal path — the 1500W rating assumes the leads are soldered into a PCB with adequate copper pour for heat sinking. The operating junction temperature range spans -55°C to 175°C, covering military and industrial thermal profiles without derating concerns at the extremes.