Siemens SIRIUS 3RT2037-3XJ44-0LA2 Contactor Traction, 65A, 30kW, 72V DC with Varistor Original Brand New

Overview

The Siemens SIRIUS 3RT2037-3XJ44-0LA2 is a high-performance traction contactor engineered for demanding applications in railway systems, industrial machinery, and other sectors requiring robust switching capabilities. This S2 frame size contactor is designed for AC-3e/AC-3 operation, handling a rated current of 65 A and a power output of 30 kW at 400 V.

Its solid-state operating mechanism ensures reliable and efficient control, while the integrated varistor protects against voltage spikes, enhancing longevity and system safety.

Key Features & Benefit

• High Performance: Rated for 65 A and 30 kW, it is suitable for heavy-duty motor control applications.
• Traction-Specific Design: Built to withstand the harsh conditions of railway and traction environments.
• Solid-State Operating Mechanism: Provides precise and reliable switching with a wide operating range of 0.7-1.25 * Uc.
• Integrated Varistor: Protects the control circuit from harmful voltage surges, extending the life of the coil and connected components.
• Versatile Auxiliary Contacts: Includes 2 Normally Open (NO) and 2 Normally Closed (NC) auxiliary contacts for flexible integration into control circuits.
• Hybrid Terminal System: Features screw terminals for the main circuit and spring-loaded terminals for control and auxiliary circuits, offering secure and quick wiring options.
• Removable Auxiliary Switch: Allows for easy customization and maintenance, adding to the product's adaptability.
• Compact S2 Frame Size: Optimizes panel space without compromising on performance.

Function

The Siemens 3RT2037-3XJ44-0LA2 serves as a key switching component in electrical systems. Its primary function is to make or break electrical circuits under normal operating conditions. In traction applications, it is used to control the power supply to motors, ensuring smooth and safe operation.

The solid-state mechanism provides a wide control voltage tolerance, making it adaptable to fluctuating power conditions. The integrated varistor effectively suppresses voltage spikes, protecting the coil and sensitive electronics within the system. The auxiliary contacts provide feedback on the contactor's status, enabling interlocking and control functions within a larger automation system.

Technical Specification

• Product Type: Contactor, traction
• Product Number: 3RT2037-3XJ44-0LA2
• Rated Current: 65 A (AC-3e/AC-3)
• Rated Power: 30 kW at 400 V
• Number of Poles: 3
• Control Voltage: 72 V DC, solid-state
• Control Voltage Range: 0.7-1.25 * Uc
• Integrated Features: Varistor
• Auxiliary Contacts: 2 NO + 2 NC
• Main Circuit Terminals: Screw terminals
• Control/Auxiliary Terminals: Spring-loaded terminals
• Frame Size: S2
• Additional Features: Removable auxiliary switch

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