The Schneider Electric G12F3F25 is a 3-pole GoPact MCCB 125 molded case circuit breaker rated 25 A at 40 °C with a TM-D thermal-magnetic trip unit. Rated operational voltage is 415 V AC 50/60 Hz per EN/IEC 60947-2, with an insulation voltage of 440 V AC.
The thermal element tracks heating in the conductor; the magnetic element reacts instantaneously on a high fault. This is a distribution-duty breaker (Category A, not a motor-circuit protector). Power dissipation is 18.7 W per pole. Mechanical durability is 30,000 cycles; electrical durability is 8,000 cycles at rated current and voltage. That suits a distribution feeder or branch circuit that sees occasional switching — not a frequent motor-start duty.
Fixed backplate mount, 75 mm wide, 130 mm high, 60 mm deep. Screw terminals on both front-connect sides (upside and downside), with a 25 mm connection pitch. IP20 finger-safe on the front; the busbar connections are not protected, so the breaker sits inside a closed panel.