1500 W transient suppressor for 64 V rails
The 1.5KE75A-E3/51: The 71.3 V minimum breakdown voltage means it stays transparent below the trigger point and only conducts when the transient exceeds the operating envelope.
Clamping and trigger thresholds
The breakdown window starts at 71.3 V minimum, so a 64 V rail with 10 % tolerance stays below the trigger. At the full 1500 W pulse, the clamp voltage holds at 104 V — the downstream components must survive that peak without avalanche breakdown. The 14.6 A peak pulse current rating at 10/1000 µs defines the surge the part absorbs before the clamp voltage rises above 104 V. A longer or higher-energy pulse pushes the junction temperature past 175 °C and risks failure — the 1500 W rating assumes the pulse width and waveform stay within the standard TVS test condition.
Through-hole axial package for board-level protection
Housed in a DO-201AA (DO-27) axial leaded package, this TVS mounts through-hole on a PCB or terminal block. The axial body handles the thermal stress of a 1500 W pulse by conducting heat into the leads and the copper trace area — the board copper under each lead acts as the primary heatsink.
Last-buy status and sourcing posture
Vishay has placed the 1.5KE75A-/51 on last-buy status — the manufacturer no longer accepts new orders beyond the final buy window.