The Schneider Electric G12E3A125 is a GoPact MCCB 125 — a 3-pole fixed-mount moulded-case circuit breaker with a thermal-magnetic TM-D trip unit rated 125 A at 40 °C. The LI protection (thermal for overload, magnetic for short-circuit) is the standard curve for distribution feeders, not motor-starting duty — the utilisation category A confirms it is not intended for frequent switching under load. Rated operational voltage is 415 V AC 50/60 Hz, insulation voltage 440 V AC — both per EN/IEC 60947-2.
Mounting and integration into a panel
Mounts fixed to a backplate — no DIN-rail clip. The 75 mm width, 130 mm height, and 60 mm depth fit standard MCCB cutouts in distribution boards. Screw terminals on both front-facing line and load sides; connection pitch is 25 mm. The grey RAL 7035 housing matches typical modular enclosure colour schemes.