1SBN040100R1014

ABB 1SBN040100R1014 – WA4-14 is a front-mounted mechanical latching unit designed for compatible ABB AF contactors and NF contactor relays. It converts a standard electrically operated contactor into a mechanically maintained device, allowing the contactor to remain in the closed position even when the main contactor coil supply is removed or fails. The WA4-14 version is rated for 250–500 V AC at 50/60 Hz and 250–500 V DC control voltage. ABB catalogs it for AF09 through AF65 contactors and compatible NF 4-pole contactor relays.