Siemens 3RT2035-1XF40-0LA2 SIRIUS Traction Contactor, 110V DC, 18.5 kW Original Brand New

Overview

The Siemens 3RT2035-1XF40-0LA2 is a robust and highly reliable traction contactor from the SIRIUS family, engineered for demanding applications, particularly in the rail and heavy industry sectors. This 3-pole contactor is rated for $41\text{ A}$ (AC-3e/AC-3) and $18.5\text{ kW}/400\text{ V}$, making it ideal for switching motors and other inductive loads.

A key feature is the efficient 110 V DC control voltage with a wide operating range of 0.7−1.25×Uc​. It incorporates a solid-state operating mechanism and an integrated varistor for superior coil protection and extended service life. Designed in the compact Frame Size S2, this unit is equipped with $1\text{ NO}+1\text{ NC}$ auxiliary contacts and secure screw terminals for all connections.

Key Benefits and Function

• High Performance Motor Switching: Rated up to $18.5\text{ kW}$, suitable for reliably controlling motors in heavy industrial and traction applications (AC-3e/AC-3 rating).
• Enhanced Coil Protection: The integrated varistor efficiently suppresses voltage peaks, protecting the solid-state control electronics and extending the contactor’s lifespan.
• Reliable DC Operation: Features a 110 V DC coil with a broad operating range, ensuring dependable switching even with voltage fluctuations common in DC systems.
• Solid-State Mechanism: Offers precise control and high operational reliability, contributing to a longer mechanical and electrical service life.
• Integrated Auxiliary Contacts: The built-in $1\text{ NO}+1\text{ NC}$ auxiliary contacts simplify wiring for interlocking, signaling, and control circuits.
• Robust & Compact Design: Frame size S2 offers a powerful solution in a space-saving industrial footprint.

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