Siemens SIRIUS 3RT1055-2XF46-0LA2 Power Contactor 150A, 75kW, 110V DC Original Brand New

Overview

The Siemens SIRIUS 3RT1055-2XF46-0LA2 is a robust and high-performance 3-pole power contactor designed for demanding industrial applications, with an extended rated condition specifically for the railway industry (meeting IEC 60077 standards). As part of the SIRIUS modular system, it delivers exceptional reliability and power switching capabilities for motors up to 75 kW at 400 V (AC-3e/AC-3), handling a rated operational current of 150 A. This model features an advanced electronic drive for precise control, a specialized 110 V DC coil with a wide operating range, and a PLC input (24-110 V DC) for seamless integration into modern automation systems.

Key Technical Specification

• Product Number: 3RT1055-2XF46-0LA2
• Contactor Series: SIRIUS 3RT1
• Poles: 3-pole
• Rated Operational Current (AC-3e/AC-3, 400 V): 150 A
• Rated Operational Power (AC-3, 400 V): 75 kW
• Control Supply Voltage (Uc): 110 V DC (Range: 0.7 – 1.25 x Uc)
• Drive Type: Electronic
• PLC Input: 24 – 110 V DC
• Auxiliary Contacts: 2 NO (Normally Open) + 2 NC (Normally Closed)
• Main Circuit Connection: Busbar
• Control/Auxiliary Circuit Connection: Spring-loaded terminal (fast, vibration-proof wiring)
• Special Feature: Extended rated condition for Railroad Applications (IEC 60077 Compliant)

Key Benefit

1. Railway & High-Demand Reliability: Specifically engineered and certified (IEC 60077) for high-shock, high-vibration, and broad temperature applications typical of railway traction systems, ensuring long-term operational integrity.
2. Advanced Electronic Control: The electronic drive and wide-range DC coil (110 V DC) provide reliable switching performance and energy efficiency compared to conventional contactors.
3. PLC Integration Ready: Built-in PLC input (24-110 V DC) allows for direct, reliable control from Programmable Logic Controllers (PLCs) across various standard voltages, simplifying system architecture.
4. Maintenance-Free Connections: Features spring-loaded terminals for control and auxiliary circuits, offering quick, simple, vibration-proof, and maintenance-free wiring, reducing installation time and downtime.
5. High-Current Capacity: Rated for switching powerful motors up to 75 kW and handling 150 A, suitable for heavy industrial motor control.

Function/Application

The Siemens 3RT1055-2XF46-0LA2 Power Contactor is primarily used for:

• Switching 3-phase AC motors (AC-3e/AC-3)
• Controlling resistive loads (AC-1)
• Safety-critical applications requiring high reliability in harsh environments.
• Specialized railway applications and other transportation systems demanding IEC 60077 compliance.
• Integration into modern, automated systems using PLC control.

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