Siemens 3RT2018-2XF42-0LA2 SIRIUS Traction Contactor, 16A, 7.5 kW, DC Control, Spring-Loaded Terminal, Size S00 Original Brand New

Overview: Siemens 3RT2018-2XF42-0LA2 Traction Contactor

The Siemens 3RT2018-2XF42-0LA2 is a high-performance SIRIUS 3RT2 traction contactor specifically engineered for demanding railway and transportation applications. It is designed for switching motors up to 7.5 kW at 400 V (AC-3/AC-3e).

This robust 3-pole contactor features a reliable solid-state operating mechanism and a wide DC control voltage range of 72-125 V DC, making it ideal for rail-specific power systems. Its integrated varistor provides crucial surge protection, ensuring high availability and a long service life. The innovative spring-loaded terminals simplify wiring, save time during installation, and guarantee vibration-proof, reliable connections, even in harsh environments.

Key Features & Technical Specifications

• Product Number: 3RT2018-2XF42-0LA2
• Contactor Type: Traction Contactor (SIRIUS 3RT2)
• Rated Operating Current (AC-3/AC-3e): 16 A
• Rated Power (AC-3/400 V): 7.5 kW
• Poles: 3-pole main circuit
• Control Voltage: 72-125 V DC (Wide range: 0.7-1.25* Uc)
• Operating Mechanism: Solid-state
• Surge Suppression: Integrated varistor
• Auxiliary Contacts: 1 Normally Closed (NC)
• Connection Type: Spring-loaded terminal (for main and auxiliary circuits)
• Size/Frame: S00 (Compact Design)

Functionality

The Siemens 3RT2018-2XF42-0LA2 functions as a robust power switch for controlling three-phase motors and other loads in mobile applications like trains and trams. It is specifically designed to handle the frequent switching and demanding environmental conditions typical of traction systems. The solid-state control ensures quiet, fast, and highly reliable switching operations, while the spring-type terminals ensure optimal electrical contact integrity in moving systems.

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