1SBN040100R1011

ABB 1SBN040100R1011 – WA4-11 is a front-mounted mechanical latching unit designed for compatible ABB AF series contactors and NF contactor relays. The accessory converts a standard electrically operated contactor into a mechanically latched switching device, allowing the contactor to remain in its operated position even after the main contactor coil supply has been removed. The WA4-11 version operates with a rated control circuit voltage of 24–60 V AC at 50/60 Hz or 24–60 V DC. ABB specifies it for AF09 through AF65 contactors and compatible NF contactor-relay configurations.