Last-buy lifecycle and what it means for your BOM
The 1.5KE180A-E3/51: Vishay lists the 1.5KE180A-/51 with a Last Buy status — the manufacturer has announced end-of-life and is accepting final orders for a defined window. Once that window closes, new production ceases. Sourcing shifts to independent distribution where available inventory is lot-specific and confirmed at RFQ.
Clamping voltage and the circuit it protects
The reverse standoff voltage of 154 V means the TVS draws negligible leakage below that rail, so it sits across a 150 V or 155 V bus without interfering with normal operation. Minimum breakdown is 171 V, giving a 17 V window between the standoff and the point where the device starts conducting — tight enough for a regulated 150 V rail.
1500 W peak pulse in a DO-201AA axial package
The DO-201AA (DO-27) axial leaded package suits through-hole assembly and high-reliability point-to-point wiring in power supplies, industrial controls, and telecom line cards.