Siemens 3RT2325-1BG40 Contactor 4-Pole, AC-1, 35A, 125V DC Coil, Screw Terminals, S0 Original Brand New

Siemens 3RT2325-1BG40 Contactor | 4-Pole, AC-1, 35A, 125V DC Coil, Screw Terminals, S0

The Siemens 3RT2325-1BG40 is a robust and reliable 4-pole contactor designed for efficient switching of AC-1 category loads. With a rated current of 35A at 400V / 40°C and a versatile 125V DC control supply voltage, this compact Size S0 contactor is an ideal solution for a wide range of industrial applications involving weak or non-inductive loads. Featuring convenient screw terminals and integrated 1 Normally Open (NO) + 1 Normally Closed (NC) auxiliary contacts, the 3RT2325-1BG40 offers excellent contact reliability and ease of integration into your control systems.

Overview

The Siemens SIRIUS 3RT23 series contactors, including the 3RT2325-1BG40, are engineered to meet stringent international standards for performance and safety. This specific model is perfect for applications requiring the four-pole switching of resistive, non-inductive, or slightly inductive loads, such as heating systems, lighting, and general power distribution. Its durable construction and comprehensive protection features ensure reliable operation and longevity in demanding industrial environments.

Key Features & Benefit

• High Performance AC-1 Switching: Rated for 35A at 400V / 40°C, making it suitable for a wide array of resistive and non-inductive loads.
• 4-Pole Configuration: Provides versatile switching capabilities for multi-phase systems or applications requiring four independent switching paths.
• Efficient 125V DC Coil: Ensures reliable operation with a direct current control supply, compatible with various control systems.
• Integrated Auxiliary Contacts (1 NO + 1 NC): Offers immediate feedback on contactor status and simplifies control circuit design, providing additional control and interlocking possibilities.
• Secure Screw Terminals: Guarantees robust and secure electrical connections, ensuring stability and reducing maintenance.
• Compact Size S0: Optimizes panel space, allowing for more efficient and compact control panel designs.
• Enhanced Contact Reliability: Auxiliary contacts are specially designed for low-voltage and low-current applications, ensuring reliable switching even with solid-state circuits.
• Standards Compliant: Manufactured to rigorous standards including IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1, ensuring global compatibility and safety.

Function

• Four-Pole Switching: Capable of disconnecting or connecting four independent circuits simultaneously.
• Load Management: Ideal for switching weak or non-inductive loads (AC-1 category).
• Grid Isolation: Used for disconnecting loads or power generation plants from the electrical grid.
• Transfer Switching: Facilitates switching between different power sources or load paths.
• Control Circuit Integration: Auxiliary contacts enable interlocking, signaling, and control functions within automated systems.

Protection & Safety:

The 3RT2325-1BG40 is designed with protection in mind, adhering to industry best practices for device and connection protection:

• Short-Circuit & Overload Protection: All connections require appropriate external protection measures. Refer to the technical product data sheet and configuration manuals for detailed guidance on main, auxiliary, and control supply voltage connections.
• Overvoltage Protection: Can be retrofitted with surge suppressors (RC elements, varistors, diodes) to dampen opening surges in the coil, protecting sensitive control components.
• Electromagnetic Compatibility (EMC): Fulfills requirements for environment category A. Specific configuration notes should be observed when used with frequency converters.

Connection Methods:

• Main Circuit: Features robust screw terminals for secure power connections.
• Auxiliary and Control Circuit: Utilizes reliable screw terminals for control wiring.

Motor Protection:

While primarily an AC-1 contactor, for applications requiring motor overload protection, the 3RT2325-1BG40 can be easily combined with Siemens SIRIUS 3RU2 thermal overload relays or 3RB3 electronic overload relays.

Operating Mechanism:

Equipped with a conventional DC operating mechanism for precise and reliable switching actions. Control is managed via the A1-A2 control supply voltage connection.

Maintenance & Expandability:

• Solenoid Coil Replacement: The solenoid coil is replaceable, extending the lifespan of the contactor.
• Auxiliary Contact Expansion: The basic unit, with its integrated 1 NO + 1 NC contacts, can be further expanded with additional auxiliary switches to meet complex control requirements.

Application

• Heating and ventilation systems
• Lighting control in commercial and industrial buildings
• Capacitor bank switching
• Isolation of non-motor loads
• Power distribution circuits
• Transfer switches in backup power systems

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