Siemens SIRIUS 3RT2327-2BF40 Contactor 50A, 4-Pole, 110V DC, Spring-Loaded Original Brand New

Siemens SIRIUS 3RT2327-2BF40 Contactor – Robust & Reliable Switching for AC-1 Application

The Siemens 3RT2327-2BF40 is a high-performance 4-pole contactor from the SIRIUS 3RT23 series, specifically designed for switching of weak or non-inductive loads (AC-1). With a rated current of 50 A at 400 V / 40 °C, this compact Size S0 contactor ensures reliable operation in demanding industrial environments. It features a 110 V DC operating mechanism, integrated 1 NO + 1 NC auxiliary contacts, and convenient spring-loaded terminals for fast and secure wiring.

Overview

The Siemens 3RT2327-2BF40 contactor is an essential component for various electrical applications, particularly where reliable switching of resistive or slightly inductive loads is required. Its robust design and adherence to international standards make it a dependable choice for disconnecting loads, managing power generation plants, and transfer switching applications. The spring-loaded terminal technology simplifies installation and offers vibration-proof connections, enhancing operational stability.

Key Features & Benefit

• Optimized for AC-1 Applications: Specifically engineered for switching 4-pole weak or non-inductive loads, making it ideal for heating, lighting, and distribution circuits.
• High Current Rating: Handles up to 50 A at 400 V / 40 °C, suitable for a wide range of industrial applications.
• Efficient DC Coil: Features a 110 V DC operating mechanism for precise and consistent control.
• Integrated Auxiliary Contacts: Comes standard with 1 NO (normally open) + 1 NC (normally closed) auxiliary contacts for flexible integration into control circuits and signaling.
• Spring-Loaded Terminals: Offers quick, easy, and secure wiring without the need for special tools, reducing installation time and ensuring a reliable, vibration-resistant connection.
• Compact Size S0: Space-saving design for efficient panel layout and installation.
• Robust Construction: Built to withstand demanding industrial conditions, ensuring long-term reliability and performance.
• Expandable Functionality: Supports additional auxiliary switches for increased control and signaling options.
• Standards Compliance: Manufactured in accordance with IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1 (for auxiliary switches), guaranteeing safety and performance.

Function

• Load Switching (AC-1): Effectively switches 4-pole weak or non-inductive loads.
• Grid Disconnection: Capable of disconnecting loads or power generation plants from the electrical grid.
• Transfer Switching: Facilitates seamless transfer between different power sources or circuits.
• Control Circuit Integration: Integrated auxiliary contacts enable interlocking, signaling, and control functions within automated systems.

Application

The Siemens 3RT2327-2BF40 contactor is ideal for a wide range of industrial and commercial applications, including:

• Heating and Lighting Circuits: Efficiently switches resistive loads in industrial heating systems and lighting installations.
• Capacitor Banks: Suitable for switching non-inductive capacitor banks.
• Resistive Furnaces: Control of heating elements in industrial furnaces.
• Power Distribution: Disconnecting and connecting loads in power distribution panels.
• Power Generation Plants: Isolation and control in power generation and renewable energy systems.
• Building Automation: Integration into building management systems for general load control.

Protection and Installation Guidelines:

All connections to the Siemens 3RT2327-2BF40 contactor must be protected against overload and short circuits. For detailed information on protection of main connections (free-standing contactor or in combination with overload relays/circuit breakers), auxiliary connections, and control supply voltage connections, please consult the technical product data sheet and relevant configuration manuals (Digital Configuration Manual for load feeders, Configuration Manual for load feeders). Consider the use of suitable power supplies with current-limiting functions and appropriate miniature or circuit breakers for control circuits. Surge suppressors are available as accessories to damp opening surges in the coil.

Connection Methods:

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

Maintenance and Spares:

The solenoid coil of the 3RT2327-2BF40 can be replaced. For comprehensive information on accessories and spare parts, refer to the “Accessories and spare parts for SIRIUS 3RT2 contactors and SIRIUS 3RH2 contactor relays” documentation.

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