Motor protection circuit breaker, 12.5 A, CLASS 10
Its 12.5 A continuous current rating and CLASS 10 trip characteristic mean it clears a stalled-rotor condition fast enough to protect standard IEC induction motors before winding temperature exceeds the insulation class — that is the core job this part is built for. Rated breaking capacity reaches 100 kA at 400 V AC, dropping to 42 kA at 500 V and 6 kA at 690 V. That means if one phase drops on a three-phase motor, the breaker trips before single-phasing cooks the winding — a standard requirement for motor protection under IEC 60947-4-1.
Any mounting position is allowed, which helps when the enclosure is tight on vertical space. Screw terminals on the main circuit accept solid or stranded conductors: 2x (1 … 2.5 mm²) and 2x (2.5 … 6 mm²), or AWG 14–10.