Siemens 3RT2017-1XF42-0LA2 SIRIUS 3RT2 Traction Contactor, 12A, 5.5kW, 3-Pole, 72-125V DC Original Brand New

Overview

The Siemens 3RT2017-1XF42-0LA2 is a high-performance SIRIUS 3RT2 traction contactor designed for demanding applications, particularly in railway and mobile equipment where robust and reliable switching is essential. Part of the SIRIUS modular system, this 3-pole power contactor is engineered for switching motors up to 5.5 kW at 400 V (AC-3e/AC-3 rating).

It features a wide-range 72-125 V DC solid-state operating mechanism, offering precise and reliable control, even with voltage fluctuations (operating range 0.7−1.25×Uc​). The integrated varistor provides essential surge suppression, protecting the coil and the control system from voltage spikes. Its compact Size S00 and secure screw terminal connections make it easy to integrate into control cabinets.

Key Functionality

• Motor Switching: Efficiently switches 3-phase AC motors up to 5.5 kW / 12 A.
• Traction Control: Built for robust performance in traction and railway applications, enduring high vibrations and extreme temperatures (−40 to +70∘C).
• Voltage Tolerance: The solid-state operating mechanism ensures reliable operation across a wide DC voltage range (0.7 to 1.25×Uc​).
• Safety & Protection: The integrated varistor minimizes overvoltage, extending the contactor’s service life and protecting connected control components.
• Signaling: The integrated 1 NC auxiliary contact provides status feedback for control systems.

Benefits & Advantages

• Extreme Reliability: Optimized for railway and demanding industrial environments with robust construction and a wide operating temperature range.
• Extended Service Life: Mechanical longevity of up to 30 million operating cycles ensures continuous, durable operation.
• Control System Protection: The integrated varistor eliminates the need for external surge suppressors, saving space and cost while protecting the coil.
• Simple Integration: Compact S00 size and standard screw terminals facilitate quick and secure installation on a 35 mm DIN rail.
• Energy Efficiency: Low operational power loss, typical of the SIRIUS 3RT2 series.

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