It carries a 100-250 V AC coil and uses screw-type terminals on both the coil and main circuit. Rated operational currents are 4 A at 230 V, 3 A at 400 V, and 2 A at 690 V — figures that govern the real load it can handle, not a single headline number. The contactor includes two built-in auxiliary contacts (instantaneous, NO/NC configurable) and can accept up to two additional attachable auxiliary contact blocks. Mounting is via screw fixing to a vertical surface; the enclosure can be rotated ±180° and tilted forward or backward ±30° at 0° rotation.
Auxiliary contact ratings — the detail that matters for control circuits
The auxiliary contacts are rated for 3 A at 24 V, 1.5 A at 48 V, 0.55 A at 110/125 V, 0.3 A at 220 V, 4 A at 230 V, 3 A at 400 V, 2 A at 500 V, and 2 A at 690 V. These are the switching limits for the control side — important when the contactor feeds a PLC input or a pilot relay. The 4 A at 230 V rating is the highest auxiliary figure; the 0.3 A at 220 V is the lowest, so verify your control voltage against the table.
The S12 frame measures 225 mm high, 184 mm wide, and 180 mm deep. Wire range for solid or stranded conductors is 1x (1-4 mm²) or 2x (1-4 mm²) per terminal. The screw-type coil terminals accept the same wire sizes.