64.1 V standoff Zener TVS in T-18 axial
Its minimum breakdown voltage of 71.3 V and maximum clamping voltage of 103 V at 5.8 A (8/20 µs) define the protection window — the rail must stay below 64.1 V during normal operation to avoid leakage, and the clamping must engage before downstream components exceed their absolute maximum. The T-18 axial package suits through-hole assembly in power supplies, industrial controls, and telecom line cards where board space is not critical.
onsemi has marked the P6KE75ARL as Obsolete. No official successor is listed by onsemi for this exact suffix. The base P6KE75A (without the RL suffix) is functionally identical electrically but or different reel quantities — the RL suffix indicates Tape & Reel (TR) packaging. If your assembly line accepts bulk tube or ammo pack, the P6KE75A may be a drop-in alternative, but verify the packaging spec with your feeder requirements.
The 600 W peak pulse rating is measured with a 10/1000 µs waveform — real-world surge duration and energy content may differ. If the transient is shorter (e.g. 8/20 µs), the device can handle a higher peak current (5.8 A) before clamping at 103 V. Confirm that the 64.1 V standoff voltage is below the maximum continuous voltage of the protected circuit; otherwise the diode conducts and may fail short.