1.5KE350C-B — 1500 W bidirectional transient suppressor
It clamps transients at 506.1 V maximum with a peak pulse current of 3.2 A, protecting downstream silicon from surge events on AC mains or DC bus lines.
Housed in a DO-201AA (DO-27) axial-lead package, the 1.5KE350C-B is a through-hole device suited for point-of-entry surge suppression on terminal blocks or PCB-mount with lead forming. The DO-201 footprint is standard across the 1.5KE family, so a single board layout accepts the full voltage range from 6.8 V to 440 V.
Littelfuse has marked the 1.5KE350C-B as obsolete. The 1.5KE series remains a widely used TVS platform, and the DO-201 package is common across multiple manufacturers. A cross-reference search against the 300 V standoff and bidirectional polarity may yield a functional equivalent, but no pin-compatible drop-in is documented here.