SIRIUS coupling contactor, size S0 — 24 VDC coil, spring terminals
Its primary role is to isolate or couple control circuits, often used between a PLC output and a higher-power contactor or motor starter, providing a clean interface point.
The DC-13 rated switching currents are the key selection criteria here: 10 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, and 0.3 A at 220 V. These ratings define the maximum inductive DC load the contacts can break reliably. For a 24 VDC control circuit — typical for PLC outputs — the 10 A rating provides generous headroom for driving multiple contactor coils or solenoid valves in parallel.
Mounting and panel integration — S0 footprint
The S0 contactor measures 45 mm wide, 102 mm high, and 107 mm deep.
Wiring — spring terminals, conductor ranges
The magnet coil uses spring-type terminals. The auxiliary switch is not fitted as standard. No special tooling is needed beyond a screwdriver for the spring-cage release.
Operating frequency — duty cycle limits
Maximum switching frequency at AC-1, AC-2, AC-3, and AC-3e duty is 1,000 operations per hour. At AC-4 duty (frequent plugging or inching), the limit drops to 300 operations per hour. These figures govern the thermal load on the contacts; exceeding them in a high-duty application will shorten contact life.