Siemens 3RT2017-2KG42 SIRIUS Power Contactor, 12A, 5.5kW, 125V DC Coil, 1NC Aux, S00, Spring-Loaded Terminal Original Brand New

Benefit

• Exceptional Reliability for DC Systems: The $125\text{ V DC}$ coil with a wide tolerance (0.7−1.25×Uc​) ensures stable switching even with voltage fluctuations, which is common in DC control circuits.
• System Protection: The integrated suppressor diode protects your control system and PLC outputs from voltage spikes generated when the contactor coil is de-energized, increasing component lifespan.
• Fast, Maintenance-Free Wiring: Spring-loaded terminals (also known as spring-cage) offer a quick, secure, and vibration-proof connection, drastically reducing installation time and eliminating the need for periodic screw retightening.
• PLC-Optimized Design: This model is suitable for direct connection to PLC outputs, simplifying control panel design and integration.
• Space Efficiency: The compact S00 frame size allows for high-density mounting in electrical cabinets, saving valuable panel space.
• SIRIUS Modular Compatibility: Seamlessly integrates with other Siemens SIRIUS devices (e.g., motor protection circuit breakers, overload relays) for a comprehensive and pre-tested load feeder solution.

Function and Application

The 3RT2017-2KG42 power contactor serves as an electrically operated switch for a main power circuit, typically controlling electric motors, heating systems, lighting circuits, and other resistive or inductive loads.

• Motor Control: Ideal for switching 3-phase motors up to $5.5\text{ kW}$ in standard industrial machinery, pumps, fans, and conveyor systems.
• DC Control Systems: Specifically engineered for use in applications where the control signal is $125\text{ V DC}$, such as in large industrial plants or specialized mobile equipment.
• Automation Interfacing: The $1\text{ NC}$ (Normally Closed) auxiliary contact provides essential feedback or interlocking functions to the programmable logic controller (PLC) or relay logic.

Technical Detail

As part of the SIRIUS 3RT2 series, the 3RT2017-2KG42 adheres to international standards and is built for global deployment, being IE3/IE4 ready and globally approved (e.g., IEC and UL/CSA). It is designed for maximum operational life and contact reliability under various climate conditions.

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