Siemens 3RT1056-6AD36 SIRIUS Power Contactor 185A, 90kW, 42-48V AC/DC Control, 2NO+2NC Aux Original Brand New

Overview

The Siemens 3RT1056-6AD36 is a high-performance SIRIUS power contactor designed for demanding industrial applications. As part of the renowned Siemens 3RT series, this contactor provides reliable and efficient switching for electric motors and other heavy-duty loads. With a robust AC-3e/AC-3 rating of 185 A and 90 kW at 400 V, it is engineered to handle significant power requirements.

Its conventional drive mechanism and versatile AC/DC control voltage range (42-48 V) make it an adaptable and dependable component for a wide range of control circuits. The inclusion of two normally open (NO) and two normally closed (NC) auxiliary contacts enhances its functionality, allowing for seamless integration into complex control systems.

Key Features & Benefit

• High Power Rating: Rated for 185 A (AC-3e/AC-3) and 90 kW at 400 V, this contactor is ideal for controlling large motors and high-current loads, ensuring reliable operation under heavy-duty conditions.
• Versatile Control: The conventional drive supports both AC (50-60 Hz) and DC control voltages from 42-48 V, offering flexibility and simplifying integration into diverse power systems.
• Integrated Auxiliary Contacts: Features 2 NO + 2 NC auxiliary contacts, providing additional switching points for signaling, interlocking, and other control functions, reducing the need for external components.
• Robust Terminal Design: The main circuit connects via busbars for a secure and high-current connection, while the control and auxiliary circuits use reliable screw terminals for easy and robust wiring.
• Durable and Reliable: Built with Siemens’s a legacy of engineering excellence, this SIRIUS contactor is designed for long service life and high operational reliability, minimizing downtime and maintenance costs.
• Compact Design: Despite its high power rating, the contactor maintains a space-saving design, allowing for efficient use of panel space.

Function 

The Siemens 3RT1056-6AD36 power contactor is primarily used for the remote switching of electric motors and other electrical loads. Its core functions include:

• Motor Control: Serves as a primary component in motor starter circuits, enabling the remote start, stop, and control of large three-phase motors.
• Load Switching: Efficiently switches high-current loads in industrial automation, HVAC systems, and other machinery.
• Interlocking & Signaling: The integrated auxiliary contacts provide critical feedback on the contactor’s status, enabling safety interlocks and signaling to a control system (e.g., PLC).
• Circuit Protection: Works in conjunction with overload relays to protect motors and equipment from overcurrents.

Technical Specification

• Product Number: 3RT1056-6AD36
• Product Type: Power Contactor
• Series: SIRIUS 3RT1
• AC-3e/AC-3 Rating: 185 A
• Rated Power (kW): 90 kW at 400 V
• Control Voltage (Uc): 42-48 V AC/DC (50-60 Hz)
• Number of Poles: 3-pole
• Auxiliary Contacts: 2 NO + 2 NC
• Drive: Conventional
• Main Circuit Connection: Busbar
• Control & Auxiliary Circuit Connection: Screw Terminal
• Manufacturer: Siemens

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