Siemens SIRIUS 3RT2325-2BF40 Contactor 4-Pole AC-1, 35A, 110V DC, Spring-Loaded Terminal Original Brand New

Overview

The Siemens SIRIUS 3RT2325-2BF40 is a high-performance 4-pole contactor designed for reliable switching of weak or non-inductive loads (AC-1 applications). Part of the renowned SIRIUS 3RT23 series, this compact Size S0 contactor boasts a 35A current rating at 400V/40°C and is controlled by a 110V DC operating mechanism. Its integrated 1 NO (normally open) and 1 NC (normally closed) auxiliary contacts, along with convenient spring-loaded terminals for the main circuit, ensure flexible and secure integration into a wide range of industrial control systems and power distribution applications.

Benefit

• Robust & Reliable Performance: Engineered to IEC 60947 standards, ensuring dependable operation for critical applications.
• Space-Saving Design (Size S0): Compact footprint allows for efficient use of space within control panels.
• Versatile AC-1 Application: Ideal for switching non-inductive loads, disconnecting power generation plants, and transfer switching.
• Secure & Fast Wiring: Spring-loaded terminals for the main circuit offer quick, vibration-resistant, and maintenance-free connections.
• Integrated Auxiliary Contacts: Features 1 NO + 1 NC auxiliary contacts for seamless integration into control circuits and signaling.
• Enhanced Safety: Designed with comprehensive protection considerations for short-circuit, overload, and overvoltage, contributing to a safer electrical system.
• Flexible Expansion: Compatible with a range of Siemens SIRIUS accessories, including additional auxiliary switches and surge suppressors.

Function

The Siemens 3RT2325-2BF40 contactor serves as an essential component in electrical systems, primarily functioning to:

• Switch AC-1 Loads: Efficiently opens and closes circuits carrying weak or non-inductive loads such as resistive heaters, lighting, and distribution circuits.
• Remote Control: Enables remote or automated control of power circuits through its 110V DC coil, allowing for integration with PLCs, sensors, and other control devices.
• Circuit Isolation: Provides a means to disconnect loads or power generation plants from the electrical grid, enhancing safety during maintenance or in emergency situations.
• Transfer Switching: Can be utilized in applications requiring the switching between different power sources.
• Signaling & Interlocking: The integrated auxiliary contacts (1 NO + 1 NC) provide feedback on the contactor’s status and can be used for interlocking functions within control circuits.

Application

The Siemens 3RT2325-2BF40 contactor is ideally suited for a variety of industrial and commercial applications, including:

• Building Automation: Switching of lighting circuits, heating elements, and ventilation systems.
• Industrial Machinery: Control of non-inductive loads in manufacturing processes.
• Power Distribution: Disconnecting and connecting sections of electrical grids.
• Renewable Energy Systems: Transfer switching or load disconnection in solar or wind power installations.
• Control Panels: Integration into motor control centers (MCCs) and other control cabinets for diverse switching tasks.

Connection Methods

• Main Circuit: Spring-loaded terminals with convenient plug-in design for device connector.
• Auxiliary and Control Circuit: Screw terminals.

Protection and Safety

All connections, including main, auxiliary, and control supply voltage, must be adequately protected against overload and short circuits. Siemens recommends consulting technical product data sheets and configuration manuals for detailed protection guidelines. Surge suppressors can be added to the control supply voltage connection to damp opening surges in the coil, enhancing the lifespan and reliability of the contactor.

Accessories & Spare Parts

A wide range of accessories and spare parts are available for the SIRIUS 3RT23 series, including:

• Auxiliary Switches: For expanding the number of auxiliary contacts.
• Surge Suppressors: RC elements, varistors, diodes, or diode assemblies for coil damping.
• Motor Protection Relays: 3RU2 thermal overload relays or 3RB3 electronic overload relays for comprehensive load feeder protection (note: consult specific application requirements).
• Replacement Solenoid Coils: For maintenance and repair.

For a complete list of compatible accessories and ordering data, please refer to the Siemens SIRIUS 3RT2 contactors and 3RH2 contactor relays accessory documentation.

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