TransZorb TVS — 1500 W peak pulse, 389 V standoff
The 1.5KE480-E3/54: This is a 1500 W (1.5 kW) peak-pulse-power TransZorb® Zener TVS diode from Vishay's 1.5KE series. The minimum breakdown voltage is 432 V, so the avalanche threshold sits about 11 % above the standoff level — a typical margin for TVS diodes guarding 380 V DC bus or 277 V AC line applications (the peak of 277 V RMS is ~392 V, just above the standoff).
Through-hole DO-201AA axial — hand-solderable, board-mount
Packaged in a DO-201AA (DO-27) axial-lead through-hole case, the 1.5KE480-/54 is straightforward to hand-solder or wave-solder into a PCB. The axial leads fit standard 0.100-inch pitch holes and the body is large enough to read the marking without magnification — a practical choice for bench repair, prototyping, or low-volume production where rework matters.