Siemens 3RT2017-2KG42-0LA0 Traction Contactor, 12A, 125V DC, S00 Original Brand New

Overview

The Siemens 3RT2017-2KG42-0LA0 is a specialized 3-pole traction contactor from the SIRIUS 3RT2 series, engineered for high-reliability switching in demanding applications like railway and mobile machinery. It combines a compact S00 frame size with robust features, including a 125 V DC operating coil and vibration-proof spring-loaded terminals, ensuring secure and maintenance-free performance. This model includes an integrated suppressor diode and a plugged-on series resistor for optimal DC control.

Benefits and Advantages

• Exceptional Reliability: Specifically designed as a traction contactor to withstand high mechanical stress, vibration, and temperature fluctuations, making it ideal for mobile and heavy-duty environments (e.g., rail, cranes).
• Vibration-Proof Connection: Spring-loaded terminals provide a permanent, gas-tight, and shock-resistant connection, significantly reducing wiring time and the need for maintenance compared to traditional screw terminals.
• Enhanced Coil Protection: The integrated suppressor diode effectively dampens switching overvoltages, protecting the coil and overall control system, and dramatically increasing the contactor’s service life.
• DC System Compatibility: The $125VDC$ coil with an extended operating range and included series resistor ensures stable and reliable switching in direct current control applications.
• Space-Saving Design: The compact Size S00 frame allows for higher density mounting in control panels and cabinets.
• Simplified Integration: Fully compatible with the modular SIRIUS 3RT2 system, allowing for seamless integration with motor protection circuit breakers and overload relays.

Function and Application

The Siemens 3RT2017-2KG42-0LA0 contactor serves as a vital component for safely and reliably switching and controlling electrical loads. Its high-performance specifications make it suitable for:

1. Railway & Transportation: Switching main motors, heating, lighting, and auxiliary circuits in trains, trams, and subway systems.
2. Mobile Machinery: Control functions in construction equipment, cranes, lifts, and other vehicles where high shock and vibration resistance is mandatory.
3. Industrial DC Control: Any industrial application requiring robust switching with a $125VDC$ control voltage and the need for high operational stability.

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