TVS clamp for 389 V rails — what the ratings mean
The 1.5KE480-E3/73: The 2.19 A peak pulse current at the 686 V clamp level is the consequence of the 1.5 kW power rating at the 10/1000 µs test waveform — a shorter pulse (8/20 µs) would yield a much higher Ipp, but the 10/1000 µs rating is the conservative endurance benchmark for power-line and industrial bus protection.
Obsolete — sourcing through independent channels
Vishay has marked the 1.5KE480-/73 as obsolete. The part is a single-channel, unidirectional suppressor in a DO-201AA (DO-27) axial-lead package, through-hole mounted.