Siemens 3RT2046-3XB44-0LA2 SIRIUS Power Contactor Traction Duty, 95A, 45kW, 24V DC, Screw/Spring Terminals, S3 Frame Original Brand New

Overview

The Siemens 3RT2046-3XB44-0LA2 is a high-performance SIRIUS power contactor specifically designed for traction applications. This robust device handles demanding loads with an AC-3e/AC-3 rating of 95 A and 45 kW at 400 V. Its solid-state operating mechanism with an integrated varistor ensures reliable and low-wear switching, making it ideal for the harsh environments of railway, automotive, and other mobile power systems. The contactor features a 24 V DC control voltage with a wide operating range of 0.7 to 1.25 times the rated control voltage (Uc), providing excellent flexibility and stability.

Key Features & Benefit

• Traction-Optimized Performance: Specifically engineered for the rigorous demands of traction duty, offering superior durability and longevity compared to standard contactors.
• High Current & Power Rating: Handles significant electrical loads with a 95 A current and 45 kW power rating, suitable for a wide range of industrial and mobile applications.
• Integrated Varistor: The built-in varistor protects the control circuit from voltage spikes, extending the lifespan of the contactor and connected equipment.
• Solid-State Operating Mechanism: Provides quiet, reliable, and low-maintenance operation with reduced mechanical wear.
• Dual Terminal System: Features screw terminals for the main circuit and convenient spring-loaded terminals for the control and auxiliary circuits, simplifying wiring and ensuring a secure connection.
• Versatile Auxiliary Contacts: Comes equipped with 2 normally open (NO) and 2 normally closed (NC) auxiliary contacts, allowing for flexible integration into complex control circuits.
• Removable Auxiliary Switch: The auxiliary switch can be easily removed or replaced, simplifying maintenance and configuration changes.
• Compact S3 Frame Size: The compact S3 frame size allows for space-saving installation in control cabinets and enclosures.

Function

The Siemens 3RT2046-3XB44-0LA2 contactor serves as a crucial component in electrical control systems, acting as an electrically operated switch. It is used to make or break a power circuit, controlling the flow of high current to motors, heaters, lighting, and other loads. In traction applications, its primary function is to manage the high power required by motors in vehicles like trains, trams, and electric buses. The 24 V DC control voltage allows it to be easily integrated into common vehicle power systems, and the auxiliary contacts provide feedback on the contactor’s status to the control system.

Technical Specification

• Product Number: 3RT2046-3XB44-0LA2
• Type: Traction Contactor
• Rated Current (AC-3e/AC-3): 95 A
• Rated Power: 45 kW at 400 V
• Poles: 3-pole
• Control Voltage: 24 V DC
• Control Voltage Range: 0.7 – 1.25 * Uc
• Operating Mechanism: Solid-state with integrated varistor
• Auxiliary Contacts: 2 NO + 2 NC
• Main Circuit Termination: Screw terminal
• Control/Auxiliary Circuit Termination: Spring-loaded terminal
• Frame Size: S3
• Special Feature: Removable auxiliary switch

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