Surge-clamp rating and what 1500 W means on a board
The 1.5SMC62A-E3/57T: Peak pulse current of 17.6 A at that same 10/1000 µs waveform tells you the let-through current the downstream load must withstand if the clamping does its job — the two numbers work as a pair in a protection-coordination calc.
DO-214AB SMC package and surface-mount handling
DO-214AB (SMCJ) is a standard power-SMD outline — the cathode band marks polarity on the unidirectional device, which must sit in the correct direction on the protected line or the clamping action is reversed and the protected node sees the surge directly. Available in Tape & Reel and Cut Tape — high-volume assembly picks TR; a Cut Tape strip is practical for prototyping or small-batch rework without opening a full reel.