TransZorb bidirectional TVS — 1500 W pulse, 356 V standoff
The 1.5KE440C-E3/73: The 356 V standoff means the part does not conduct at normal line voltages up to that level — it sits transparently across the rail until a transient exceeds the 396 V minimum breakdown threshold, then clamps the surge to 631 V or below. Packaged in the DO-201AA / DO-27 axial-lead form factor, it mounts through-hole on a board or terminal strip — the axial body handles the thermal pulse of a 1500 W surge without requiring a heatsink.
Bidirectional clamping for AC or floating DC rails
With a single bidirectional channel, this TVS clamps transients of either polarity — suitable for AC signal lines, floating DC buses, or any application where the surge polarity is unknown. No power line protection feature is built in — this is a standalone transient suppressor, not a filtered or coordinated protector; it relies on the upstream fuse or breaker for overcurrent clearing.
Obsolete — sourced through independent channels
No official successor part number is recorded from Vishay for this order code.