Siemens 3RT2046-3XJ44-0LA2 SIRIUS 95A 45kW Traction Contactor, 72V DC Coil, S3 Original Brand New

Overview

The Siemens SIRIUS 3RT2046-3XJ44-0LA2 is a high-performance traction contactor designed for demanding applications in railway technology and other DC-controlled environments. This robust 3-pole contactor is rated for AC-3e/AC-3, handling currents up to 95 A and motor loads up to 45 kW at 400 V.

It features a specialized 72 V DC solid-state operating mechanism that includes an integrated varistor for surge suppression, ensuring reliable and long-lasting operation. The compact Frame Size S3 design integrates essential features like a removable auxiliary switch with 1 NO + 1 NC contacts, making it versatile for control systems.

Key Function

1. Motor Switching: Safely and reliably switches three-phase AC motors in traction and industrial applications.
2. DC Control: Operates with a specific 72 V DC control voltage (operating range 0.7−1.25×Uc​), ideal for mobile and railway electrical systems.
3. Surge Protection: The integrated varistor protects the coil and control system from transient overvoltages.
4. Signal Integration: Provides feedback and control through the integrated 1 NO + 1 NC auxiliary contacts.
5. Simplified Wiring: Utilizes screw terminals for the main power circuit and spring-loaded terminals for secure and fast wiring of the control and auxiliary circuits.

Benefit & Features

• High Performance: Rated for 95 A ($45\text{ kW}$ at $400\text{ V}$) for heavy-duty motor control.
• Reliable DC Operation: Specifically engineered with a solid-state operating mechanism for dependable performance in $72\text{ V DC}$ control systems.
• Enhanced Durability: Integrated varistor significantly improves the lifespan by suppressing voltage spikes.
• Flexible Connections: Combination of screw terminals (main circuit) and spring-loaded terminals (control/auxiliary) offers both robustness and installation speed.
• Convenient Servicing: Features a removable auxiliary switch for easy replacement or reconfiguration.
• Space-Saving Design: Utilizes the industry-standard SIRIUS Frame Size S3.

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