1500W peak pulse, 20.5V standoff — what the ratings mean for rail protection
The 1.5KE24A/B: This clamping margin — 33.2V vs the 20.5V standoff — is the voltage the downstream components must survive; a 36V-rated capacitor or 40V-rated MOSFET on the rail has headroom.
DO-201 axial package and temperature range
Housed in a DO-201AA (DO-27) axial-lead package, the 1.5KE24A/B mounts through-hole on a PCB or terminal block. The junction operates from -55°C to 150°C, covering industrial and automotive under-hood ambient without derating the peak pulse power at the high end — the 1500W rating holds across the full temperature band, though derating above 25°C is typical per the TVS application note.