1SBN040100R1013

ABB 1SBN040100R1013 – WA4-13 is a front-mounted mechanical latching unit designed to convert compatible ABB AF contactors or NF contactor relays into mechanically maintained switching devices. Once the associated contactor closes, the WA4 latching mechanism keeps it in the closed position even if the supply voltage at the contactor coil is removed or fails. The WA4-13 version operates from a wide 100–250 V AC 50/60 Hz or 100–250 V DC control supply. ABB catalogs this version for compatible AF-series contactors, including the AF09…AF65 range, as well as suitable NF contactor-relay configurations.