Siemens 3RT1056-2AD36 SIRIUS Power Contactor, 3-Pole, 185A, 90 kW, 400V, 42-48V UC Coil, Busbar Main, Spring-Loaded Control Original Brand New

Overview

The Siemens 3RT1056-2AD36 is a robust, 3-pole SIRIUS power contactor designed for reliable switching of electric motors and other high-current loads up to $185A$ (AC-3e/AC-3) and $90kW$ at $400V$. Part of the SIRIUS modular system, this size S6 contactor is engineered for industrial control applications requiring high performance and compact design. Its unique control voltage range and terminal type make it ideal for specific modern control systems.

Key Technical Specifications

• Product ID: 3RT1056-2AD36
• Contactor Type: Power Contactor for Switching Motors
• Series: SIRIUS 3RT10
• Contactor Size: S6 (High-performance, compact)
• Poles: 3-pole for main circuit
• Rated Operational Current (Ie​): $185A$ (at $400V$, $\text{AC-3e/AC-3}$)
• Rated Operational Power ($\text{P}$): $90kW$ (at $400V$, $\text{AC-3e/AC-3}$)
• Control Supply Voltage (Uc​): $42\text{ – }48V$ $\text{AC}(50\text{ – }60Hz)/\text{DC}$ (UC operation – Wide-range coil)
• Auxiliary Contacts: Integrated $\text{2 NO + 2 NC}$ (Normally Open + Normally Closed)
• Main Circuit Connection: Busbar connection (ideal for high-current power distribution systems)
• Control/Auxiliary Circuit Connection: Spring-loaded terminal (fast, vibration-proof, and maintenance-free connection)
• Drive: Conventional operating mechanism

Benefit

1. High-Current Motor Switching: Certified for $\text{AC-3e/AC-3}$ utilization category, ensuring safe and reliable switching of high-efficiency IE3/IE4 motors up to $185A$ and $90kW$.
2. Flexible Control: Equipped with a $\text{42-48V}$ $\text{AC/DC}$ (UC) wide-range coil, offering flexibility and simplified parts inventory for both $\text{AC}$ and $\text{DC}$ control systems.
3. Fast & Reliable Wiring: Features $\text{spring-loaded terminals}$ for the control and auxiliary circuits, providing a quick, secure, and vibration-proof connection, reducing installation time and maintenance costs.
4. Integrated Auxiliaries: Comes with built-in $\text{2 NO + 2 NC}$ auxiliary contacts, reducing the need for external components and simplifying circuit design.
5. Robust Power Connection: $\text{Busbar connections}$ for the main circuit ensure robust and efficient power delivery for heavy-duty industrial loads.
6. SIRIUS Modular System: Seamless integration with other SIRIUS components (like overload relays and accessories) for building complete, high-performance load feeders.

Application

The 3RT1056-2AD36 is the ideal choice for switching three-phase asynchronous motors in a wide range of industrial applications, including:

• Machine Tools
• Pumps and Compressors
• Conveyor Systems
• HVAC and Refrigeration Plants
• General Industrial Machinery

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