What this part does
The K8AB-PW2 is a Voltage Sensing AC monitor — it watches a three-phase line (220 ~ 480VAC supply) and trips its two SPDT relays when voltage goes outside the set window. The delay is adjustable from 0.1 Sec ~ 30 Sec, so you can ride through momentary sags without nuisance trips. Each relay contact is rated 6A @ 250VAC, enough to drive a contactor coil or alarm beacon directly.
Lifecycle and sourcing reality
This part is discontinued per Omron's product status. There is no official successor order code listed. For a line-down replacement, source through surplus or broker channels — we can quote current availability and lead time on request.