Siemens 3RT2035-1KB40 Power Contactor AC-3e/AC-3, 41A, 18.5kW, 24V DC, S2 Frame Original Brand New

Overview

The Siemens SIRIUS 3RT2035-1KB40 is a high-performance, S2 frame power contactor engineered for reliable switching of motors and electrical loads. This 3-pole contactor is designed for robust performance in demanding industrial applications, offering an operational current of 41 A for AC-3e/AC-3 duty and a rated power of 18.5 kW at 400 V. Its compact design and integrated features make it a versatile and space-saving solution for control panels and automation systems.

Key Benefit & Features

• High Performance: Capable of handling significant electrical loads with a 41 A current rating and 18.5 kW power rating at 400 V.
• DC Operation: Equipped with a 24 V DC control voltage, making it perfectly suited for modern control systems and PLC outputs.
• Wide Voltage Tolerance: Features a 0.8-1.2* Uc operating range, ensuring reliable performance even with fluctuating control voltages.
• Integrated Varistor: The built-in varistor provides surge suppression for the control circuit, protecting sensitive electronic components and extending the contactor’s lifespan.
• Auxiliary Contacts: Includes one normally open (NO) and one normally closed (NC) auxiliary contact, providing flexibility for signaling and interlocking functions.
• Robust Connection: Secure and reliable screw terminals simplify wiring and ensure a strong, long-lasting connection.
• Compact Design: The S2 frame size offers a small footprint, allowing for high-density installation in control cabinets.
• PLC Compatibility: Specifically designed to be suitable for use with PLC outputs, ensuring seamless integration into automated systems.

Function

The Siemens 3RT2035-1KB40 power contactor serves as an electromechanical switch. When the 24 V DC control voltage is applied to the coil, the main contacts close, allowing power to flow to a connected motor or load. When the voltage is removed, the contacts open, interrupting the power supply. The integrated varistor protects the control circuit from voltage spikes, while the auxiliary contacts provide feedback on the contactor’s status to the PLC or other control logic.

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