The Schneider Electric A9GSB692 is an Acti9 SBI fuse-disconnector — a 1P+N switch-disconnect that accepts 22 x 58 mm cartridge fuses and is rated for 125 A at 690 V AC per IEC EN 60947-3. That standard covers the isolation and switching performance you need for a safe disconnection point in a distribution board or motor control centre.
Screw-clamp terminals top and bottom accept 1.5 to 50 mm² rigid cable (or 2.5 to 35 mm² flexible, with or without ferrule). Strip length is 12 mm; tightening torque is 4 N·m. That's a generous wire range for a 125 A device — you can land a 50 mm² feeder directly without adaptors.