1500W bidirectional TVS in a DO-201 package
The 1.5KE540CA: This is the part to reach for when you need to protect a 460V nominal rail from surges — the standoff sits right at the line voltage, so it stays out of the way during normal operation but fires before the downstream silicon sees damage. It handles 2A peak pulse current (Ipp) under the standard 10/1000µs test condition.
Through-hole fit and temperature range
Housed in a DO-201AA (DO-27) axial-lead package, the 1.5KE540CA is a through-hole part — you solder it into a board or wire it into a terminal block. The DO-201 footprint is standard and well-documented; the axial leads make it a candidate for point-to-point wiring in power supplies or industrial controls where a surface-mount TVS might not handle the surge energy. No power line protection (the part is not designed for continuous AC mains clamping — it is a transient suppressor, not a line filter).