The spring-loaded terminals accept 2x (0.25 to 2.5 mm²) solid or stranded copper, or 2x (24 to 14 AWG).
The AC-2 rating at 5.5 kW / 400 V is the motor-switching figure that governs real-world use: it confirms the contactor can handle the inrush and breaking duty of wound-rotor motors. For resistive loads (AC-12), the maximum operating current is 10 A. The contactor is also rated for DC switching at various voltages: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, and 0.3 A at 220 V — these are the current limits for breaking DC inductive circuits, which arc differently than AC. The coil operates at 50/60 Hz with a voltage tolerance of 0.8 to 1.1 times the rated value. For type of coordination 2 (limited fault damage), the required upstream fuse is gL/gG 20 A; for type 1 (no damage to persons or installation, but contactor may need replacement), it is 35 A.
Environmental limits and enclosure considerations
The contactor is rated IP20 on the front and at the terminals, so it is touch-safe but not protected against water ingress — it must be installed inside a panel with a suitable enclosure rating.