The P6KE180A-T is a 600W peak pulse power Zener TVS diode from Diodes Incorporated, in a DO-204AC (DO-15) axial-lead package. The 2.4A peak pulse current rating (10/1000 µs waveform) tells you the energy-handling capacity for a standard surge — useful for sizing the protection on a 154V rail against lightning or inductive kickback.
Where this part fits in the cycle
Diodes Incorporated lists the P6KE180A-T as Obsolete.
Through-hole DO-15 (DO-204AC) axial package — the leads are 0.025-inch diameter, spaced 0.300 inches apart. The body is 0.140 inches diameter, 0.300 inches long. Standard 0.036-inch diameter holes on a 0.400-inch pitch in the PCB layout. No power line protection — it is a unidirectional transient suppressor, not a crowbar or polyfuse.
