The G12F4F80 is a Schneider Electric GoPact MCCB 125 moulded-case circuit breaker, a 4-pole (4P) fixed-mount unit with a TM-D thermal-magnetic trip unit. Its 80 A rating at 40 °C sets the continuous current the breaker carries without tripping under normal conditions — size the upstream conductor and downstream load for this figure, not the frame's 125 A label. The 30 kA breaking capacity at 380/415 V AC is the F performance level: it safely interrupts a fault up to that current, which governs the available fault current the breaker can see on a distribution board. Rated operational voltage is 415 V AC 50/60 Hz, rated insulation voltage 440 V AC.
Both line and load connections are front-facing screw terminals with a 25 mm connection pitch. The IP20 finger-safe enclosure keeps live parts protected inside the panel but is not rated for washdown — keep it behind a locked enclosure door.