1.5KE12A/B — 1500W Zener TVS for DC rail and signal-line clamping
It clamps a 10.2V nominal rail to 16.7V maximum under a 91A peak pulse current, which means a 12V supply bus or a 12V signal line gets held below the typical 18V abs-max of downstream ICs during a transient event. The breakdown voltage range starts at 11.4V minimum, so the diode does not conduct during normal 10.2V operation but fires well before the rail reaches damaging levels.
Package and board-fit — DO-201 axial, through-hole mounting
Housed in a DO-201AA / DO-27 axial-lead package (supplier device package DO-201), the 1.5KE12A/B is a through-hole part intended for point-to-point wiring or PCB mounting with 0.050-inch lead spacing. The axial body sits flat on the board or can be formed for vertical insertion — common in crowded power-entry sections where a surface-mount TVS would not handle the pulse energy. The operating junction temperature range spans -55°C to +150°C, which covers both cold-start automotive environments and hot-side industrial enclosures without derating the 1500W pulse rating.
Lifecycle and supply — active production, no obsolescence concern
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