The G12E3F16 is a 3-pole GoPact MCCB 125 with a TM-D thermal-magnetic trip unit rated 16 A at 40 °C. Per EN/IEC 60947-2, the LI protection curve covers overload (thermal, L) and short-circuit (magnetic, I) — the thermal element tracks RMS heating, the magnetic element responds to instantaneous peaks. Mounting is fixed to a backplate via screw terminals with a 25 mm connection pitch. Pollution degree 3 (IEC 60664-1) confirms it tolerates conductive dust and condensation typical of industrial control rooms, not clean-room or outdoor exposure.
The toggle handle protrudes from the front; allow clearance for manual operation and for the arc-chamber venting path. Screw terminals accept copper conductors sized for 16 A continuous load; torque per the nameplate marking. Above 2000 m altitude, derate per the manufacturer's curve; the part is certified for use up to 5000 m with derating. Power dissipation is 18.7 W per pole at rated current — three poles total 56.1 W at full load. Factor this into the panel's thermal budget; adjacent devices should be spaced or derated if the enclosure lacks forced ventilation.