Siemens SIRIUS 3RT2326-1BB40-1AA0 Contactor 4-Pole, AC-1, 40A, 24V DC, S0 Size, Screw Terminal Original Brand New

Overview

The Siemens SIRIUS 3RT23 series contactors are designed for switching non-inductive or weakly inductive loads (AC-1) and are ideal for applications such as disconnecting loads or power generation plants from the grid, and transfer switching. The 3RT2326-1BB40-1AA0, a prominent member of this series, combines compact design with high performance and reliability. Manufactured to stringent international standards, including IEC 60947, it ensures safe and efficient operation in various industrial environments. Its user-friendly design facilitates easy installation and maintenance, making it a preferred choice for control panel builders and industrial automation specialists.

Benefit

• Reliable Performance: Built to Siemens’ high-quality standards, ensuring long-term operational stability and safety.
• Versatile Application: Ideal for a wide range of AC-1 switching applications, including resistive heating, lighting, and general power distribution.
• Space-Saving Design: Compact S0 size allows for efficient use of space within control cabinets.
• Easy Installation: Screw terminals provide secure and straightforward wiring.
• Integrated Auxiliary Contacts: The 1 NO + 1 NC auxiliary contacts offer immediate feedback and control possibilities.
• Enhanced Protection Options: Compatible with various protection devices for short-circuit, overload, and overvoltage, enhancing system safety.
• High Contact Reliability: Auxiliary contacts are designed for reliable switching even at low voltages and currents (e.g., solid-state circuits).

Function

The Siemens 3RT2326-1BB40-1AA0 Contactor primarily functions as an electrically controlled switch for:

• Switching AC-1 Loads: Efficiently opens and closes circuits for non-inductive or weakly inductive AC loads.
• Load Disconnection: Provides a robust means to disconnect electrical loads or power generation plants from the main grid.
• Transfer Switching: Can be utilized in transfer switching applications for power sources.
• Control Circuit Integration: Auxiliary contacts enable seamless integration into control and signaling circuits.

Protection of Connections:

• Main Connections: Requires suitable short-circuit and overload protection. Refer to the technical product data sheet for free-standing contactor protection, and the Digital/Configuration Manuals for device combinations (e.g., with overload relays or circuit breakers).
• Auxiliary Connections: Protection information available in the technical product data sheet.
• Control Supply Voltage Connections: Protection should align with relevant standards for control panels. Consideration of power supply with current-limiting function, load characteristics (inrush current, holding power), and short-circuit protection for other switching elements (e.g., overload relay auxiliary contacts) is crucial. Recommendations for miniature or circuit breakers in control circuits are available.
• Overvoltage Protection: 3RT23 contactors can be retrofitted with surge suppressors (RC elements, varistors, diodes) for coil damping (ordered separately). Note that damping increases break and delay times.

Connection Methods:

• Main Circuit (3RT232): Screw terminals.
• Auxiliary and Control Circuit: Screw terminals.

Motor Protection: For overload protection of motors connected via 3RT23 contactors, Siemens 3RU2 thermal overload relays or 3RB3 electronic overload relays can be directly mounted.

Operating Mechanism: This model features a conventional DC operating mechanism, controlled via terminals A1-A2. Specific operating ranges are detailed in the technical product data sheet.

Maintenance & Expandability:

• Solenoid Coil: Replacement of the solenoid coil is possible for the 3RT2326-1BB40-1AA0.
• Auxiliary Contacts: The basic unit includes two integrated auxiliary contacts (1 NO + 1 NC). Additional auxiliary switches can be mounted to expand functionality, adhering to permissible configurations. Refer to “Auxiliary switches, instantaneous → Overview” for detailed information.

Accessories and Spare Parts: A wide range of accessories and spare parts are available for SIRIUS 3RT2 contactors and 3RH2 contactor relays. Please refer to the dedicated accessory catalogs or the Turll website for ordering data and overview graphics of mountable accessories.

Application

The Siemens SIRIUS 3RT2326-1BB40-1AA0 contactor is ideally suited for:

• Switching non-inductive or weakly inductive loads (AC-1) up to 40A.
• Controlling resistive loads such as heating elements and lighting systems.
• Applications requiring reliable disconnection from the grid.
• Transfer switching in power distribution systems.
• Integration into industrial control panels and automation systems where robust and dependable switching is required.

For more products and detailed technical documentation, please visit Turll.