The Schneider Electric G12E3F80 is a GoPact MCCB 125 — a 3-pole molded-case circuit breaker rated 80 A at 40 °C, with a TM-D thermal-magnetic trip unit providing LI protection (thermal overload + magnetic short-circuit). The 80 A rating covers feeder circuits for moderate loads: lighting panels, small motor control centers, or downstream switchgear. The thermal-magnetic curve is fixed — no interchangeable trip units — so the 80 A frame is what you spec into the BOM.
Integration and mounting notes
Fixed-mount, backplate installation — screws into the panel via the 25 mm connection pitch. The 75 x 130 x 60 mm footprint (W x H x D) fits standard distribution enclosures. IP20 finger-safe terminals (IEC 60529) mean the breaker is protected against accidental contact in a closed panel; no additional shrouding needed for the operator's side. Rated isolation capability per EN/IEC 60947-2 — the toggle provides visible disconnect indication, so it doubles as a service-disconnect switch for the downstream circuit.
Durability and thermal budget
Mechanical endurance at 30,000 cycles and electrical endurance at 8,000 cycles at rated current and 415 V — typical for a distribution-grade MCCB in this class. The 18.7 W power dissipation per pole (56 W total at 80 A) needs to be factored into the enclosure's thermal calculation; don't crowd it next to heat-sensitive components. Operating temperature range -20 to 55 °C, storage -35 to 85 °C.