Clamping voltage and protection window
The 1.5KE250A R0G: Its 214V reverse standoff voltage means the protected line sees no leakage up to that rail; above 237V the device starts breaking down, and it hard-clamps at 344V maximum, shunting up to 4.5A of surge current away from the load.
Active lifecycle — no rush to redesign
Taiwan Semiconductor lists the 1.5KE250A R0G as Active.
Through-hole axial — field-swappable
Housed in a DO-201AA (DO-27) axial-lead package, the 1.5KE250A R0G is a through-hole part. That means it can be replaced on a board with a soldering iron and basic hand tools — no hot-air station or reflow profile needed. The axial leads are clearly polarised (cathode band), so orientation is straightforward even without a schematic in hand.
Wide temperature range for industrial gear
The 1500W pulse rating holds across that range, though derating applies above 25°C ambient per the standard power-temperature curve for axial TVS devices.