Its 4 kW rating at 400 V AC-3 (cite:) covers the common small-motor range — pumps, fans, conveyors up to that mechanical load. The 24 VDC coil (cite:) keeps it on standard control voltages, and the screw-type terminals (cite:) accept the wire sizes you'd expect for this class: 2x 0.5 to 1.5 mm² solid, 2x 0.75 to 2.5 mm², or up to 2x 4 mm² (cite:).
The auxiliary contact block is rated 10 A at 24 V (cite:), 2 A at 60 V (cite:), 1 A at 110 V (cite:), and 0.3 A at 220 V (cite:) — these are the DC switching limits for the built-in auxiliary, so if you're driving a PLC input or a relay coil at a different voltage, verify the curve.
That's the practical guide for the panel builder: if you want to avoid pulling the contactor after a short, stay at 20 A or below. The contactor has 3 main poles (cite:) and supports side-by-side mounting with zero spacing (cite:) — no derating needed for adjacent units, which helps when packing multiple contactors into a tight row.