What the key ratings mean for your circuit
The 1.5KE16C-E3/54: Above that, the device starts to avalanche. The 23.5 V clamp is the voltage the protected circuitry sees during a transient — a downstream component rated for at least 24 V has margin. The 63.8 A peak current figure is the corresponding current at the clamp voltage — useful for fuse coordination studies.
Package and temperature range
Housed in a DO-201AA (DO-27) axial-lead package, the 1.5KE16C-/54 is a through-hole part — it mounts into a 1.1 mm diameter hole on a standard PCB or terminal block. The axial leads suit point-to-point wiring or board-level installation where a surface-mount TVS is not preferred. The wide range means the TVS can be deployed in outdoor telecom cabinets, engine compartments, or cold-chain equipment without derating concerns at the temperature extremes.