What the 1.5 kW rating means for your rail
The 1.5KE24A R0G is a 1500 W peak pulse power TVS diode in the 1.5KE series from Taiwan Semiconductor Corporation, packaged in a through-hole DO-201AA (DO-27) axial body. It clamps a 20.5 V nominal rail to 33.2 V maximum at the full 47 A peak pulse current (10/1000 µs waveform), meaning a 24 V bus or 12 V battery line gets clamped before downstream regulators see the surge.
Breakdown and clamping window
Minimum breakdown voltage is 22.8 V, with a reverse standoff of 20.5 V — the diode stays high-impedance below that rail level and starts conducting at the breakdown threshold. The 33.2 V maximum clamp at 47 A peak pulse current gives a 12.7 V window between standoff and clamp, which keeps the protected node within the safe operating area of most 30 V-rated downstream silicon.
Temperature range and package fit
The DO-201AA axial package suits point-to-point wiring or through-hole PCB mounting; the lead spacing matches standard 0.300-inch pitch layouts.