The G12F4A25 is a 4-pole GoPact MCCB 125 molded case circuit breaker rated 25 A at 40 °C with a 30 kA breaking capacity at 380/415 V AC. The thermal-magnetic TM-D trip unit provides LI protection: thermal overload (L) for sustained overcurrents and magnetic short-circuit (I) for fast fault clearing. The 4D protected poles mean all four poles are protected, with neutral protection set to 1 x Ir. Rated operational voltage is 415 V AC 50/60 Hz, with an insulation voltage of 440 V AC — both per EN/IEC 60947-2.
Fixed mounting on a backplate — no DIN-rail clip here, so plan for screw-mounting on the panel subplate. Dimensions are 100 mm wide × 130 mm high × 60 mm deep, with a 25 mm connection pitch. Front-facing screw terminals on both line and load sides make busbar and cable routing straightforward. The toggle control protrudes for manual switching; ensure clearance in the enclosure door.
The suitability-for-isolation marking per EN/IEC 60947-2 means it meets the disconnect requirements for a distribution board. Electrical durability is 8000 cycles at 415 V In; mechanical durability is 30000 cycles.