The Schneider Electric G12F3F16 is a GoPact MCCB 125 series 3-pole molded case circuit breaker with a fixed mount, rated 16 A at 40 °C and a 30 kA breaking capacity at 380/415 V AC (performance level F). Rated operational voltage is 415 V AC at 50/60 Hz, with an insulation voltage of 440 V AC, both per EN/IEC 60947-2. The breaker is suitable for isolation per that standard, meaning you can safely use it as a disconnecting means for a downstream load during maintenance — the open contacts provide a visible air gap that meets the isolation requirement. It's designed for distribution applications (not motor protection with integrated overload relay — that's a separate class). The 3D protected poles description means all three poles are protected with the thermal-magnetic trip; there's no fourth pole for neutral switching on this variant.
Mounts on a backplate — not DIN rail — so it's a fixed, screw-terminal connection intended for panel or enclosure mounting. The 25 mm connection pitch matches standard busbar or cable lug spacing. Front-facing terminals on both line and load sides make wiring straightforward in a typical distribution panel layout. Dimensions are 130 mm high, 75 mm wide, 60 mm deep — compact for a 3-pole 125 A frame breaker. The IP20 finger-safe protection on the terminals means it's protected against accidental contact but not against moisture or dust ingress; install it inside a rated enclosure. Mounting position is flexible — horizontal, vertical, or flat on the back — which helps when laying out a dense panel. The toggle control type gives a clear visual indication of the contact position.
Operating altitude range is 0–2000 m without derating; above that up to 5000 m requires derating — a factor if the installation is at high elevation. Ambient operating temperature is -20 to 55 °C, storage -35 to 85 °C. Electrical durability is 8000 cycles at rated current and voltage; mechanical durability is 30,000 cycles — the breaker is built for a long service life in a fixed installation. Power dissipation per pole is 18.7 W at rated current — total about 56 W for the three poles. That heat must be considered in the enclosure thermal design to avoid nuisance tripping from ambient heating.