The latching mechanism holds the main contacts closed without continuous coil power — the coil draws 620 W to latch and 45 W to unlatch, with operating times of 40...80 ms latching and 50...100 ms unlatching.
The 630 A rated operational current (Ie) applies at <= 440 V AC in AC-4 duty, which covers plugging and inching of slip-ring motors — the most severe switching category. The conventional free air thermal current (Ith) is 1000 A at 104 °F (40 °C), meaning the main poles can carry that current continuously in free air without exceeding temperature rise limits. The rated short-time withstand current (Icw) is 5050 A for 1 second, which matters for coordination with upstream protective devices. Motor power ratings span from 200 kW at 220...230 V up to 450 kW at 1000 V AC (50/60 Hz). Under UL/CSA, it handles 800 hp at 575...600 V for three-phase motors. The rated insulation voltage (Ui) is 1000 V per IEC 60947-4, with an impulse withstand voltage (Uimp) of 8 kV — this gives the clearance and creepage for direct connection to 1000 V buswork.
This contactor is a control component for large motor loads — pumps, compressors, conveyors, and fans — typically mounted in a motor control center (MCC) or switchgear lineup. The bar terminals (2 x 60 x 5 mm) accept busbar connections for high-current distribution. With a mechanical durability of 1 Mcycles and utilisation categories AC-1 (resistive), AC-3 (squirrel-cage motors), and AC-4 (plugging/inching), it suits both continuous and heavy-duty cycling applications.