SIRIUS S3 power contactor — panel-fit and ratings
For AC-2 duty (slip-ring motor starting) it is rated 30 kW at 400 V, and at 500 V it handles 37 kW — a solid match for 50 Hz supply lines common in European and Asian plants. Dimensions are 146 mm high, 90 mm wide, and 139 mm deep — a standard S3 footprint that drops into existing panel layouts specified for this frame size.
Wire termination and environmental range
Main circuit screw terminals accept solid conductors 2x (0.25 to 2.5 mm²) and stranded conductors 2x (10 to 50 mm²), with an intermediate solid-or-stranded range of 2x (2.5 to 16 mm²). This covers both control wiring and power cable sizes typical for a 37 kW motor circuit. Maximum switching rates vary by duty: 1 000 cycles/hour at AC-1 and AC-3, 400/h at AC-2, and 300/h at AC-4 — respect the AC-4 limit for reversing applications to avoid premature wear.
Coil and auxiliary ratings
The contactor's coil operates at 50 Hz with a voltage tolerance of 0.8 to 1.1 times the rated value. Arcing time is 10 to 15 ms, and the make/break time at AC is 10 to 19 ms — consistent with S3-frame switching dynamics. Auxiliary contact ratings at 24 V are 10 A, derating to 6 A at 230 V and 3 A at 400 V. For DC switching, the 24 V rating is 10 A, 60 V is 2 A, 110 V is 1 A, 220 V is 0.3 A, and 690 V is 18.6 kW — the DC curve drops sharply, so verify the load type if switching DC solenoids or brake coils.
Compliance documentation typically includes CE marking per low-voltage directive, UL/CSA recognition for North American installations, and REACH SVHC declarations. Specific certificate numbers should be confirmed at quote time against the target jurisdiction.