1500W surge clamp for 128V rails
The 1.5KE150A/B: The 1500W rating means this part absorbs surge energy from lightning-induced transients, inductive load switching, or ESD events on 120V AC or 128V DC power buses without failing short. The 207V clamp ceiling protects downstream semiconductors rated for 250V or less.
DO-201 axial footprint and through-hole mounting
Housed in a DO-201AA / DO-27 axial-lead package (supplier device package DO-201), the 1.5KE150A/B mounts through-hole on a PCB or terminal block. The axial leads handle the 1500W pulse without trace lift-off when the board layout keeps the lead length under 6 mm per side. No power line protection feature is asserted — this is a unidirectional clamp for DC rails, not an AC mains protector. The single unidirectional channel covers positive-polarity transients to ground.
Active lifecycle and sourcing posture
No official second-source or pin-compatible cross-reference is listed in the manufacturer data. The 1.5KE series covers multiple standoff voltages; a 1.5KE150A/B is the specific 128V standoff variant.