The ABB A26N1-30-01-84 is an A26N1 series contactor, identified in the record as an A26N1 CONTR. This is a panel-mount contactor for switching motor and resistive loads in industrial control cabinets.
For a BOM line that needs this exact order code, the only path is the secondary market. No official successor order code is listed in the record, so any replacement requires a parametric cross-reference against the original application's coil voltage, contact configuration, and mounting footprint.