Siemens 3RT2035-3SB30 SIRIUS Power Contactor, 41A, 18.5kW, AC/DC Coil with Integrated Varistor Original Brand New

Overview

The Siemens 3RT2035-3SB30 is a high-performance SIRIUS power contactor engineered for reliable switching of motors and other industrial loads. As part of the SIRIUS family, this size S2 contactor is known for its compact design, efficiency, and robust functionality. It features a 3-pole configuration with a rated operational current of 41 A for AC-3e/AC-3 applications, handling loads up to 18.5 kW at 400 V. The integrated varistor provides crucial surge suppression, protecting your control system from voltage peaks. The flexible 21-33 V AC/DC control voltage range simplifies inventory and integration.

Key Features & Benefit

• High Performance: Rated for 41 A and 18.5 kW, capable of handling demanding industrial motor control applications.
• Integrated Varistor: Protects your PLC outputs and control circuitry from damaging voltage spikes and surges, ensuring system stability and longevity.
• Flexible Control: Operates on a wide 21-33 V AC/DC control voltage, making it suitable for a variety of control systems, including PLC and F-PLC-IN applications.
• Robust Terminal Connections: The main circuit utilizes secure screw terminals for strong, reliable connections, while the control and auxiliary circuits feature convenient spring-loaded terminals for fast, tool-free wiring.
• Space-Saving Design: The compact S2 size allows for efficient panel design and installation in tight spaces.
• Safety & Reliability: Includes one normally closed (1 NC) auxiliary contact for feedback and interlocking, enhancing system safety and control.
• Optimized for PLC Integration: The “F-PLC-IN” designation signifies its suitability for direct connection to PLC outputs, simplifying wiring and reducing potential points of failure.

Function

The Siemens 3RT2035-3SB30 power contactor serves as an electro-mechanical switch for controlling electrical loads. When the control coil is energized by a 21-33 V AC/DC signal, the main contacts close, allowing power to flow to the connected equipment (e.g., an electric motor). When the control signal is removed, the contacts open, interrupting the power supply. The integrated varistor dissipates surge energy, protecting sensitive electronics. The auxiliary contact provides a signal back to the control system, indicating the status of the main contacts.

Technical Specification

• Product Number: Siemens 3RT2035-3SB30
• Type: Power Contactor
• Series: SIRIUS
• Size: S2
• Poles: 3-pole
• Rated Operational Current (AC-3e/AC-3): 41 A
• Rated Power (AC-3): 18.5 kW @ 400 V
• Control Voltage: 21-33 V AC/DC, 50/60 Hz
• Auxiliary Contacts: 1 NC
• Terminal Type (Main Circuit): Screw Terminals
• Terminal Type (Control & Auxiliary): Spring-loaded Terminals
• Special Features: Integrated varistor, F-PLC-IN

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