SIRIUS S10 power contactor — 3RT1066-2AV36
It carries a 380-420 VAC 50/60 Hz coil with spring-type terminals, and the main power poles accept stranded conductors from 70 up to 240 mm² — sized for higher-current distribution or large motor feeds.
Duty-cycle and switching frequency
The 3RT1066-2AV36 is rated for different maximum switching frequencies depending on the duty category: 750 operations per hour in AC-1 (resistive), 250 in AC-2, 500 in AC-3 and AC-3e, and 130 in AC-4 (high-inrush or plugging duty). For a motor-switching application on a conveyor or pump running AC-3 duty, the 500 ops/h ceiling means it can cycle about once every 7 seconds continuously — enough for most process cycles, but not for a rapid-reversing application that would push into AC-4 territory.
Coil and auxiliary contact details
The coil picks up at 0.8 x rated voltage (about 304 VAC minimum for the 380-420 VAC coil) and operates with a power factor of 0.9 at both 50 Hz and 60 Hz. The contactor includes an auxiliary switch block (rated 10 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V), which is useful for feedback to a PLC or for electrical interlocking without adding a separate auxiliary contactor. The coil itself uses spring-type terminals — no screwdriver needed for the coil wiring, which speeds up panel wiring and reduces the chance of loose connections on the control side.
Physical envelope and clearances
The contactor measures 210 mm high, 145 mm wide, and 202 mm deep — a substantial footprint that reflects the S10 frame's current-handling capacity. These are the distances to maintain for arc flash containment and cooling airflow; a panel layout that crams the contactor against the enclosure wall or another device risks derating or nuisance tripping. The mounting holes are 11 mm diameter, single hole per fixing point, consistent with standard M10 or 3/8" hardware.
Environmental limits and lifecycle status
The 3RT1066-2AV36 operates in ambient temperatures from -25 °C to +60 °C and can be stored from -55 °C to +80 °C — the storage range is wider because the contactor is not dissipating heat or switching current while stored.