1.5 kW clamping diode for 8.55 V rails
The 1.5KE10A-E3/51: The 1500 W rating means it absorbs a single-pulse surge of that magnitude; the actual energy handling depends on pulse duration, and the 10/1000 µs waveform is the industry-standard test condition for TVS diodes in this power class.
Last-buy status — what it means for procurement
This part carries a Last Buy lifecycle status, meaning Vishay has announced end-of-life and a final purchasing window is open. It is not yet discontinued, but new designs should not specify this order code — the supply channel shifts to surplus and broker inventory once the last-buy period closes. No official successor order code is recorded in the lifecycle entry.
Breakdown, clamping, and thermal envelope
Breakdown voltage is specified at 9.5 V minimum, so the device begins conducting in avalanche above that threshold. The DO-201AA axial-lead package (also known as DO-27) is a through-hole form factor suited for point-to-point wiring or PCB mounting with a single-hole or wave-solder footprint. Power line protection is marked as 'No' — this is not a bidirectional or AC-line-rated TVS; it is intended for DC rail clamping where polarity is fixed.