Siemens SIRIUS 3RT2047-3XJ40-0LA2 Traction Contactor, S3, 110 A, 72V DC, 1 NO + 1 NC Original Brand New

Overview

The Siemens SIRIUS 3RT2047-3XJ40-0LA2 is a high-performance traction contactor designed for demanding applications in railway and other mobile equipment. As part of the SIRIUS 3RT2 series, it combines robust construction with innovative technology to ensure reliable and safe switching of motors and electrical loads.

This specific model features a solid-state operating mechanism with an integrated varistor, offering enhanced durability and protection against voltage spikes. With a compact S3 frame size and a range of connection options, it is an ideal solution for systems requiring reliable DC switching in a space-efficient form factor.

Key Features & Function

• Traction Contactor (AC-3e/AC-3): Specifically engineered for high-demand traction applications, it is rated for both AC-3e and AC-3 categories, making it suitable for a wide range of motor switching tasks.
• High Current & Power Rating: Handles up to 110 A at 55 kW / 400 V, making it suitable for powerful motors and heavy-duty applications.
• 72 V DC Control Voltage: Designed for low-voltage DC control circuits, it operates reliably within a wide voltage range of 0.7 to 1.25 times the nominal control voltage (Uc​).
• Solid-State Operating Mechanism with Integrated Varistor: This advanced feature provides a fast and reliable switching operation while the integrated varistor protects the control circuit from damaging voltage surges and inductive loads. This significantly extends the service life of the contactor.
• Auxiliary Contacts: Includes 1 normally open (NO) and 1 normally closed (NC) auxiliary contact, providing essential feedback and control signals for interlocking and monitoring circuits.
• Hybrid Terminal System: Offers the best of both worlds with a robust screw terminal for the main power circuit, ensuring a secure and high-conductivity connection, and a convenient spring-loaded terminal for the control and auxiliary circuits, allowing for fast and easy wiring without the need for tools.
• Compact Frame Size S3: The space-saving design is ideal for installations with limited cabinet space, without compromising on performance.

Benefit

• Enhanced Reliability: The solid-state mechanism and integrated varistor minimize wear and tear, leading to a longer operational life and reduced maintenance.
• Versatile Application: Suitable for a wide range of motor control applications, particularly in traction, railway, and industrial machinery.
• Simplified Installation: The hybrid terminal system streamlines wiring, reducing installation time and complexity.
• Improved Safety: The integrated varistor protects sensitive control components from electrical spikes, ensuring system integrity and safety.
• Space-Efficient Design: The compact S3 frame size allows for higher density installations, optimizing cabinet layout.

Application

• Traction systems (locomotives, trams, electric vehicles)
• Railway signaling and control
• Heavy-duty industrial machinery
• Motor control centers (MCCs)
• Pump and fan control systems
• Conveyor systems

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