Siemens 3RT1056-6AS36 Power Contactor, 185A, 90kW, 500-550V UC, Size S6 Original Brand New

Overview: Siemens 3RT1056-6AS36 SIRIUS Power Contactor (Size S6)

The Siemens 3RT1056-6AS36 is a robust, 3-pole power contactor from the globally recognized SIRIUS 3RT10 series, designed for switching motors and other high-power electrical loads. As a heavy-duty device in the Size S6 frame, it is engineered for reliable performance in demanding industrial applications. This specific model features a wide-range AC/DC conventional drive control voltage of 500-550 V and includes integrated auxiliary contacts for enhanced control circuit flexibility.

Benefit and Features

• High Performance: Rated for $185\text{ A}$ (AC-3) and $90\text{ kW}$ at $400\text{ V}$, making it suitable for large motor control and high-current applications.
• Flexible Control: The wide-range $500\text{–}550\text{ V AC/DC}$ conventional drive coil simplifies inventory and installation across different supply voltages.
• Integrated Auxiliary Contacts: Built-in $2\text{ NO}+2\text{ NC}$ auxiliary contacts save panel space and wiring time, crucial for interlocking and signaling circuits.
• Robust Connection: Main circuit connection via Busbar for secure and high-capacity power distribution; control and auxiliary circuits use reliable Screw Terminals.
• SIRIUS Modular System: Seamless compatibility and easy integration with other components from the Siemens SIRIUS modular system (e.g., overload relays, circuit breakers).
• Global Standard: Fully compliant with IEC, UL/CSA, and other international standards, ensuring worldwide applicability.

Function

The Siemens 3RT1056-6AS36 contactor is primarily used as an electrically controlled switching device in the main circuit of industrial automation and control systems. Its main function is to remotely switch on and off 3-phase electric motors (AC-3/AC-3e utilization category) and resistive loads. It is a critical component in the load feeder, operating reliably under various load conditions to ensure efficient motor operation.

Application

• Motor control systems (starting, stopping, and reversing)
• Pump control and fan systems
• Heating and lighting circuits in large industrial facilities
• Power distribution and switching in industrial automation panels
• Integration into complex machinery and control cabinets

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