Siemens 3RT2316-1BG40 Contactor 4-Pole AC-1, 18A, 125V DC, Screw Terminal, Size S00 Original Brand New

Overview

The Siemens 3RT2316-1BG40 is a high-performance 4-pole contactor designed for reliable switching of AC-1 category loads up to 18 A at 400 V (at 40 °C). Featuring a 125 V DC coil and convenient screw terminals, this compact Size S00 contactor is an essential component for various industrial control applications. Its robust design and adherence to international standards like IEC 60947 ensure optimal performance and safety in diverse environments.

Benefit

• Reliable Performance: Built to Siemens’ high-quality standards, ensuring long-term operational stability for switching non-inductive loads.
• Versatile Application: Ideal for four-pole switching of weak or non-inductive loads, disconnecting loads, power generation plants, and transfer switching.
• Space-Saving Design: Compact Size S00 form factor allows for efficient use of panel space.
• Easy Installation: Screw terminals provide a secure and straightforward connection method.
• Enhanced Protection: Designed with considerations for short-circuit, overload, and overvoltage protection, and can be retrofitted with surge suppressors for increased coil protection.
• Expandability: Can be expanded with additional auxiliary switches (sold separately) to meet specific control circuit requirements.
• Global Compliance: Conforms to essential international standards for industrial control gear.

Function

The Siemens 3RT2316-1BG40 contactor serves as a critical switching device in electrical circuits. Its primary functions include:

• Load Switching: Efficiently makes and breaks electrical connections for 4-pole AC-1 category loads.
• Circuit Isolation: Provides a means to disconnect loads or power generation plants from the electrical grid.
• Transfer Switching: Facilitates the transfer of power between different sources.
• Control Integration: Acts as an interface between the control circuit (125 V DC) and the main power circuit, allowing for automated or manual control of connected loads.
• System Protection: When combined with appropriate overload relays and circuit breakers, it forms a comprehensive protection solution for electrical equipment.

Application

• Switching resistive loads (e.g., heating elements, lighting systems)
• Controlling non-inductive motor loads with appropriate overload protection
• Disconnecting generators or solar inverters from the grid
• Implementing transfer switches in power distribution systems
• Used in general industrial automation, HVAC systems, and building management.

Protection of Device Connections:

• Main Connections: Requires protection against overload and short circuits. Refer to the technical product data sheet for free-standing contactor protection or the Digital/Configuration Manual for load feeders with overload relays or circuit breakers.
• Auxiliary Connections: Information on protection is available in the technical product data sheet.
• Control Supply Voltage Connections: Protection should align with relevant standards for control panel configuration, considering cable dimensioning and load characteristics (inrush/holding power). Suitable power supplies with current-limiting functions and protection devices (e.g., miniature circuit breakers) are recommended.
• Overvoltage Protection (Control Supply): The 3RT2316-1BG40 can be retrofitted with external surge suppressors (RC elements, varistors, diodes) for damping opening surges in the coil, ordered separately. Note that damping increases break and delay times.

Connection Methods:

• Main Circuit: Screw terminals.
• Auxiliary and Control Circuit: Screw terminals.

Electromagnetic Compatibility (EMC):

• Fulfills requirements for environment category A.
• When used with frequency converters, specific configuration notes in the Equipment Manual must be observed.

Contact Reliability of Auxiliary Contacts:

• Auxiliary contacts of 3RT contactors are designed for high contact reliability, especially suitable for switching low voltages (≤ 110 V) and currents (≤ 100 mA), including solid-state circuits (≥ 1 mA at 17 V and higher).

Motor Protection:

• For overload protection of motors, 3RU2 thermal overload relays or 3RB3 electronic overload relays can be directly mounted onto the 3RT2316-1BG40.

Operating Mechanism:

• Equipped with a conventional DC operating mechanism, controlled via the A1-A2 control supply voltage connection.

Maintenance & Accessories:

• Solenoid Coil Replacement: Possible.
• Auxiliary Contacts: One auxiliary contact is integrated. Additional auxiliary switches can be mounted to expand functionality (permissible configuration must be observed).
• Accessories & Spare Parts: A wide range of accessories and spare parts are available. Refer to “Accessories and spare parts for SIRIUS 3RT2 contactors” for details.

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