Siemens 3RT2325-2BG40 Contactor 4-Pole, AC-1, 35A, 125V DC Coil, Spring-Loaded, Size S0 Original Brand New

Siemens 3RT2325-2BG40 Contactor: Robust 4-Pole Switching for AC-1 Application

The Siemens 3RT2325-2BG40 is a high-performance 4-pole contactor from the SIRIUS 3RT2 series, engineered for reliable switching of weak or non-inductive loads (AC-1 applications). With a rated current of 35 A at 400 V / 40 °C and a versatile 125 V DC coil, this contactor is ideal for demanding industrial environments requiring robust and efficient power control. Featuring convenient spring-loaded terminals and a compact size S0, the 3RT2325-2BG40 ensures quick and secure installation, minimizing downtime.

Overview

The Siemens 3RT2325-2BG40 contactor is a crucial component for various electrical systems, offering precise control for applications such as disconnecting loads, switching power generation plants from the grid, and transfer switching. Designed to meet stringent international standards including IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1 (for auxiliary switches), this contactor guarantees dependable operation and safety. Its integrated 1 normally open (NO) and 1 normally closed (NC) auxiliary contacts provide essential feedback and control options for complex circuits.

Key Benefit

• Reliable Performance (AC-1): Specifically designed for switching non-inductive or weakly inductive loads up to 35 A, ensuring stable operation.
• Versatile DC Coil: Operates with a 125 V DC control supply, suitable for a wide range of control systems.
• Space-Saving Design: Compact S0 size for efficient panel layout and optimization of cabinet space.
• Quick & Secure Wiring: Spring-loaded terminals for fast, reliable, and vibration-resistant connections, reducing installation time and maintenance.
• Enhanced Control & Feedback: Integrated 1 NO + 1 NC auxiliary contacts offer additional functionality for signaling and interlocking.
• Standards Compliance: Built to global standards (IEC 60947 series), guaranteeing quality, safety, and compatibility.
• Long-Term Reliability: Siemens’ renowned engineering ensures durability and extended service life in industrial applications.

Function & Features

The Siemens 3RT2325-2BG40 contactor offers a comprehensive set of functions and features to meet the rigorous demands of industrial automation:

• 4-Pole Switching: Enables simultaneous control of four separate circuits or phases, ideal for multi-phase AC-1 applications.
• Main Circuit Protection: Designed for integration into systems with appropriate short-circuit and overload protection. Refer to technical datasheets and configuration manuals for detailed guidance on protecting main connections, especially in device combinations with overload relays or circuit breakers.
• Auxiliary & Control Circuit Protection: Guidance provided for protecting auxiliary contacts and control supply voltage connections, including recommendations for power supply selection (e.g., current-limiting functions) and the use of miniature circuit breakers.
• Overvoltage Protection: The 3RT23 contactors can be retrofitted with surge suppressors (RC elements, varistors, diodes) to dampen opening surges in the coil, protecting sensitive control components.
• Connection Methods: Features spring-loaded terminals for the main circuit, ensuring robust and convenient wiring. Auxiliary and control circuits utilize reliable screw terminals.
• Electromagnetic Compatibility (EMC): Fulfills requirements for environment category A, ensuring reliable operation in various industrial settings. Specific configuration notes are provided for use with frequency converters.
• High Contact Reliability: Auxiliary contacts are designed for high contact reliability, particularly suitable for switching low voltages (≤ 110 V) and currents (≤ 100 mA), as well as solid-state circuits with currents ≥ 1 mA at 17 V and higher.
• Motor Protection Integration: Compatible with 3RU2 thermal overload relays or 3RB3 electronic overload relays for robust motor protection, ensuring system longevity and safety (for motor-driven loads, consider special 3RT23 versions for AC-3 applications).
• Operating Mechanism: Equipped with a 125 V DC conventional operating mechanism for reliable coil actuation.
• Auxiliary Contact Expansion: The basic unit comes with 1 NO + 1 NC integrated auxiliary contacts and can be expanded with additional auxiliary switches for increased functionality and customization.
• Serviceability: Solenoid coil replacement is possible, enhancing the product’s lifespan and ease of maintenance.
• Accessory Compatibility: A wide range of accessories and spare parts are available for the SIRIUS 3RT2 contactors to meet specific application requirements.

Application

The Siemens 3RT2325-2BG40 contactor is ideally suited for:

• Four-pole switching of weak or non-inductive loads (AC-1): Perfect for heating elements, lighting systems, and distribution circuits.
• Disconnecting loads or power generation plants from the grid: Ensures safe isolation during maintenance or emergencies.
• Transfer switching: Facilitates smooth transitions between different power sources.
• General industrial control applications where robust and reliable switching of AC-1 loads is required.

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