The P6KE300A-T is a 600 W peak-pulse-power Zener TVS diode from Diodes Incorporated, intended for general-purpose overvoltage protection on a 256 V nominal rail. Its 285 V minimum breakdown voltage means the device starts conducting when the line exceeds that threshold, and the 414 V maximum clamping voltage at the 1.45 A peak pulse current (10/1000 µs waveform) defines the highest voltage the protected load sees during a surge event.
Lifecycle and procurement reality
This part is marked Obsolete by the manufacturer. For a BOM manager evaluating a repair or legacy-production run, the 600 W rating and the DO-15 axial footprint are the two parameters to match when selecting a functional replacement; a board spin may be required if a pin-compatible drop-in is not available.
Package and integration note
The through-hole mount is straightforward for hand-assembly or wave-solder lines — the axial leads insert into plated through-holes and the body sits above the board, allowing natural convection cooling during pulse events. The DO-15 footprint is a common form factor across TVS families, so PCB layout for this part is standard and easily adapted to alternate suppliers if needed.