SIRIUS S00 power contactor with spring terminals
The coil is rated at 24 VDC, and the main contacts carry 10 A at 24 VDC, 2 A at 48 VDC, 2 A at 60 VDC, 1 A at 110 VDC, 0.9 A at 125 VDC, 0.3 A at 220 VDC, and 3 A at 400 VDC — these are the DC-1 or DC-3 ratings per the datasheet, so the actual current depends on the load type and switching frequency. The contactor includes an integrated auxiliary switch, saving panel space compared to adding a separate block. Wiring is via spring-type terminals (cage clamp), accepting solid or stranded conductors from 0.5 to 4 mm², or 2x (0.5 to 4 mm²) per clamp. This speeds panel assembly and eliminates periodic screw-torque checks on vibrating machinery.
Switching frequency and thermal limits
Maximum switching frequency depends on the duty class: 1,000 cycles/hour at AC-1 (resistive loads), 750 cycles/hour at AC-2 and AC-3 (slip-ring and squirrel-cage motors), 750 cycles/hour at AC-3e (enhanced motor switching), and 250 cycles/hour at AC-4 (plugging/inching).