SIRIUS S6 power contactor with 72 VDC coil
The 3RT1056-6XJ46-0LA2: Its 72 VDC coil voltage matches common DC control bus architectures in process plants and machine tools. The contactor measures 170 mm deep by 120 mm wide by 172 mm high, fitting into standard panel layouts with screw fixing through a single 9 mm mounting hole.
Duty-cycle ratings and switching frequency
Switching frequency varies by duty class: 800 operations per hour maximum in AC-1 (resistive), 750 in AC-3 (motor starting), 300 in AC-2 (slip-ring motor), and 130 in AC-4 (plugging/inching). For DC loads, the maximum is 400 ops/h in DC-1, 350 in DC-3 and DC-5. The AC-3e rating matches the AC-3 figure at 750 ops/h. These timing values matter for coordinating contactor operation with upstream protective devices and safety circuits.
Auxiliary contacts and termination
An auxiliary switch is integrated, with current ratings at various control voltages: 6 A at 24 VDC, 2 A at 48 VDC and 60 VDC, 1 A at 110 VDC, and 0.9 A at 125 VDC. These ratings define the switching capability for status feedback or interlocking circuits. The screw fixing method uses a single 9 mm diameter hole for panel mounting.
Environmental range and mechanical endurance
Typical mechanical endurance is 10 million operations, supporting long service intervals in high-cycle applications. The full-scale value of 1.25 and initial value of 0.7 relate to thermal overload relay settings for motor protection coordination.