Siemens 3RT2017-1JB41 Power Contactor, 12A, 24V DC, 1 NO Original Brand New

Overview

The Siemens 3RT2017-1JB41 is a high-performance, compact power contactor from the SIRIUS series, specifically engineered for AC-3e/AC-3 switching applications. This device is ideal for motor switching and general industrial control in environments requiring reliable, space-saving components. Featuring a 24 V DC coil with an integrated suppression diode, it’s perfectly suitable for direct control by PLC outputs, ensuring safe and efficient operation. Its robust design with screw terminals guarantees a secure and straightforward connection.

Benefit

1. PLC Compatibility: The 24V DC coil with an integrated diode is optimized for direct control by PLC outputs, simplifying wiring and enhancing system reliability by protecting sensitive electronics from coil back-EMF.
2. Compact Design (S00): The small frame size S00 allows for significant space savings in control cabinets, maximizing panel density.
3. High Reliability: Rated for both AC-3 (conventional switching) and the energy-efficient AC-3e categories, offering consistent and reliable switching performance for motors up to 5.5 kW.
4. Secure Connections: Screw terminals provide a time-tested, secure, and vibration-proof electrical connection for industrial environments.
5. Ready-to-Use Functionality: Includes 1 NO auxiliary contact as standard, providing immediate feedback or enabling interlocks without the need for external add-ons.

Function

The Siemens 3RT2017-1JB41 contactor functions as an electrically operated switch. When the 24 V DC control voltage is applied to the coil (within the $0.7$ to 1.25×Uc​ tolerance), an electromagnetic field is generated. This field pulls the armature, closing the three main power contacts to supply power to the load (e.g., a motor). Simultaneously, the integrated 1 NO auxiliary contact changes state (closes), providing a signal for control systems. The integrated diode ensures the rapid decay of the magnetic field when power is removed, minimizing voltage spikes and protecting the controlling device.

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