The G12E3F50 is a 3-pole GoPact MCCB 125 rated 50 A at 40 °C with a 15 kA breaking capacity at 380/415 V AC. For a 50 A feeder, the magnetic pickup is fixed and non-adjustable on this TM-D variant.
Isolation suitability is confirmed per EN/IEC 60947-2 — the breaker provides visible isolation when open, which matters for lockout/tagout procedures during panel maintenance.
Integration notes
Dimensions: 130 mm height, 75 mm width, 60 mm depth. The 75 mm width per 3-pole unit is standard for this frame size — check gland-plate fill factor if retrofitting into a crowded enclosure. Power dissipation is 18.7 W per pole, so at full load the breaker dumps about 56 W into the panel. Account for that in thermal derating if the enclosure is sealed or tightly packed. Ambient operating range is -20 to 55 °C; storage range is -35 to 85 °C. Altitude derating kicks in above 2000 m: no derating up to 2000 m, then apply the standard IEC derating factors up to 5000 m. Electrical durability is 8000 cycles at rated current; mechanical durability is 30000 cycles. For frequent switching applications (e.g., capacitor bank or motor starting), those cycle counts set the replacement interval.