Clamping a 342V rail with a 600W pulse rating
The P6KE400A-B: When the voltage exceeds the 380V minimum breakdown threshold, the device shunts the surge to ground, holding the clamp at 548V maximum at the rated 1.1A peak pulse current (10/1000µs waveform). This is a unidirectional suppressor — one channel, cathode-band oriented — so it protects a single DC rail or signal line against positive-going transients.
DO-15 axial — board-mount and storage
Housed in a DO-204AC (DO-15) axial-lead package, the P6KE400A-B is a through-hole part. The body is 0.034-inch diameter with 0.040-inch lead diameter — the leads are tin-plated copper, solderable into a 0.040-inch plated through-hole on a 0.100-inch grid. The junction operates from -55°C to 175°C, so it handles the thermal pulse of a 600W surge without derating at room ambient. Supplied in Bulk (tube or bag), not tape-and-reel — the leads are straight, not formed for surface mount. Store the reels dry: the DO-15 body is not moisture-sensitive, but the leads can oxidise in humid storage. No power line protection rating — this is a signal- or DC-rail suppressor, not an AC mains MOV replacement.
Active production — sourcing posture
No official second-source or pin-compatible cross-reference is listed, but the P6KE family (base number P6KE400) shares the same DO-15 footprint and 600W rating across multiple vendors.