Siemens 3RT2325-1AC20 Contactor 4-Pole AC-1, 35A, 24V AC,Size S0 Screw Terminal Original Brand New

Overview

The Siemens 3RT2325-1AC20 is a high-performance 4-pole contactor from the SIRIUS 3RT2 series, specifically designed for switching non-inductive or weakly inductive loads (AC-1 applications). With a robust current rating of 35 Amperes at 400 V and 40 °C, this contactor offers reliable and efficient operation in various industrial and commercial settings. It features a 24 V AC (50/60 Hz) coil, ensuring compatibility with common control voltages, and comes equipped with 1 Normally Open (NO) and 1 Normally Closed (NC) auxiliary contacts for flexible circuit integration. The compact Size S0 design and convenient screw terminals facilitate easy installation and wiring.

Key Features & Benefit

• Reliable AC-1 Switching: Ideal for controlling heating, lighting, and distribution circuits, as well as disconnecting loads or power generation plants from the grid.
• 4-Pole Configuration: Provides versatile switching capabilities for multi-phase systems or applications requiring multiple independent circuits.
• High Current Rating: Handles up to 35 Amperes (at 400 V / 40 °C), suitable for a wide range of resistive and slightly inductive loads.
• Integrated Auxiliary Contacts: Includes 1 NO + 1 NC auxiliary contacts for status indication, interlocking, or controlling other devices. These contacts ensure high contact reliability, even at low voltages (≤ 110 V) and currents (≤ 100 mA).
• 24V AC Coil: Standard control voltage for seamless integration into existing control systems.
• Screw Terminals: Provides secure and straightforward wiring connections for both main and auxiliary circuits.
• Compact Size S0: Space-saving design for efficient panel layout and installation.
• Robust Construction: Manufactured by Siemens, a leader in industrial automation, ensuring durability and long-term performance.
• Standards Compliance: Adheres to international standards including IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1, guaranteeing safety and performance.
• Expandable Functionality: Can be expanded with additional auxiliary switches and surge suppressors (RC elements, varistors, diodes) for enhanced circuit protection and control flexibility.
• Motor Protection Compatibility: Designed to integrate seamlessly with Siemens 3RU2 thermal overload relays or 3RB3 electronic overload relays for comprehensive motor protection in compatible applications (though this specific model is primarily for AC-1, it highlights the SIRIUS family’s versatility).

Function

• Switching Non-Inductive/Weakly Inductive Loads: Primarily used for switching resistive loads like heaters, incandescent lamps, or oven circuits (AC-1 category).
• Load Disconnection: Effectively disconnects loads or power generation plants from the main grid.
• Transfer Switching: Can be utilized in transfer switching applications.
• Control Circuit Integration: Auxiliary contacts enable interlocking, status signaling, and control of other components within a larger electrical system.
• Protection Integration: Designed to work in conjunction with suitable short-circuit and overload protection devices for the main, auxiliary, and control supply voltage connections.
• Coil Damping (Optional): Supports retrofitting with surge suppressors to dampen opening surges in the coil, protecting sensitive control components.

Application

• Controlling resistive heating elements in industrial furnaces or commercial kitchens.
• Switching lighting circuits in large buildings or outdoor installations.
• Managing power distribution to non-motor loads.
• Isolation and disconnection of power supplies.
• Integration into control panels for various automation tasks where reliable AC-1 switching is required.

Protection and Installation Guidelines:

All connections to the Siemens 3RT2325-1AC20 contactor must be protected against overload and short circuits. For detailed information on protecting main, auxiliary, and control supply voltage connections, please refer to the technical product data sheet, Digital Configuration Manual, or Configuration Manual for load feeders. Consider using suitable power supplies with current-limiting functions and appropriate circuit breakers (e.g., miniature circuit breakers) for control circuits. Surge suppressors are available as accessories to protect the control supply voltage connection from overvoltage.

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