1.5 kW Zener TVS — 11.4 V standoff, 21 V clamp
The 1N6146A: It clamps at 21 V maximum when conducting 71.4 A, with a reverse standoff voltage of 11.4 V.
Through-hole axial package — board-mount note
Supplied in a through-hole axial package (B, Axial). The leads exit the body on both ends, so the part sits flat on the PCB or can be mounted vertically for dense layouts. The copper tab area under the cathode end sets the thermal resistance — a generous pad or a heatsink trace on the board improves surge-handling margin.