The STMicroelectronics P6KE30ARL is a 600 W peak pulse power Zener diode from the P6KE TRANSIL™ series, designed for general-purpose transient voltage suppression in through-hole assemblies. Its 26 V reverse standoff voltage means it sits across a 24 V rail without conducting during normal operation, while the 28.5 V minimum breakdown voltage defines where clamping begins. When a transient hits, the device clamps at 53.5 V maximum and can handle 75 A of peak pulse current under the 8/20 µs waveform — enough for industrial surge events on DC power buses or relay-coil kickback. The 1075 pF capacitance at 1 MHz is worth noting for signal-line applications — this is a power-rail suppressor, not a high-speed data-line protector. On a 24 VDC motor-drive rail or a 24 V industrial sensor bus, the capacitance is irrelevant; on a communication line above a few hundred kHz, it would load the signal. The part carries no power-line protection rating, confirming its role as a secondary-side transient clamp rather than a mains-entry suppressor.
DO-15 axial package — through-hole assembly considerations
The P6KE30ARL comes in a DO-204AC (DO-15) axial-lead package, intended for through-hole mounting. This is a hand-solder or wave-solder form factor — not pick-and-place friendly without a forming fixture. The Tape & Reel suffix (RL) means it ships on a reel for automated lead-forming equipment, not for SMD placement. If your rework bench or prototype lab needs a few pieces for a repair, the axial leads are easy to hand-solder into plated through-holes, but verify the lead bend radius matches your hole spacing.
Obsolete — sourcing through independent distribution
The P6KE30ARL is listed as Obsolete by STMicroelectronics. For a BOM line that calls out this exact ordering code, the procurement path is independent distribution, where we source from verified inventory lots. Because this is a through-hole Zener from a mature family, date codes on the surplus market can span several years.