The coil is 415 V AC 50 Hz wide-range, with a drop-out threshold of 0.3 to 0.6 Uc and pick-up at 0.7 to 1.25 Uc across the operating temperature range. The 4 NO pole configuration means no auxiliary contacts are built in — if you need feedback or a holding circuit, plan for an external auxiliary block.
The headline number is 40 A at 415 V in AC-1 duty. That is the resistive-load rating; do not apply it to motor starting without consulting the AC-3 curve. The rated breaking capacity is 144 A at 440 V, and the making capacity is 180 A at 440 V — both under IEC 60947-4-1, so the contactor handles the brief surge of a cold resistive load without welding. Heat dissipation runs 2 to 3 W on the control circuit and 2.6 W per pole in AC-1, which matters for enclosure thermal management if you are packing several units side by side. The maximum operating rate is 1800 cycles per hour at 60 °C.