1500 W peak pulse — what that means on a transient line
The 1.5KE16A-E3/54: That 1.5 kW rating means it clamps a 66.7 A surge down to 22.5 V maximum — enough to protect a 12 V or 13.6 V rail from load-dump or inductive kickback without the part self-destructing. The reverse standoff voltage is 13.6 V typical, with a breakdown range starting at 15.2 V minimum. A 12 V supply bus that sees occasional transients up to 60 V stays protected — the TVS stays out of the circuit until the rail exceeds 15.2 V, then clamps hard.
Through-hole DO-201AA — field-swappable without a hot-air station
The DO-201AA (DO-27) axial package is a through-hole part — you can swap it on site with a soldering iron and a pair of cutters. No hot-air station, no preheater. The unidirectional channel is clearly marked by the cathode band; orientation is obvious enough to get right the first time.
Active production — no obsolescence worry for new builds
The base product number is 1.5KE16, and the suffix indicates RoHS-compliant lead-free termination. The /54 suffix is Vishay's tape-and-reel packaging code for the axial lead form.