1SBN040100R1012

ABB 1SBN040100R1012 – WA4-12 is a front-mounted mechanical latching unit used with compatible ABB AF contactors and NF contactor relays. It converts a standard electrically operated contactor into a mechanically latched device, allowing the contactor to remain in its operated position even after the main contactor coil has been de-energized.

The WA4-12 operates with a wide control-voltage range of 48–130 V AC at 50/60 Hz and 48–130 V DC. ABB specifies this version for AF09 through AF65 contactors and compatible NF 1-stack contactor relays. The catalog weight is approximately 0.080 kg per unit.