Obsolete status and what it means for your BOM
The 1.5KE82A/54 is marked obsolete by Vishay General Semiconductor - Diodes Division.
Clamping performance and protection envelope
The reverse standoff voltage is 70.1 V, meaning the diode conducts negligible leakage below that rail — it sits across a 70 V or lower supply bus without loading it. Breakdown occurs at 77.9 V minimum, so the protection triggers before the bus reaches 78 V. This is a unidirectional device (single channel) — the cathode band marks the protected side; the anode connects to ground.
Package and temperature range for through-hole designs
Housed in a DO-201AA (DO-27) axial-lead package, the 1.5KE82A/54 mounts through-hole. The axial lead form factor is a direct-fit replacement for legacy through-hole TVS sockets — no board respin required if the existing layout uses a DO-201 footprint.