Siemens 3RT2325-1AL20 Contactor 4-Pole AC-1, 35A, 230V AC Coil, S0 Size, Screw Terminal Original Brand New

Siemens 3RT2325-1AL20 Contactor: Reliable 4-Pole AC-1 Switching for Industrial Application

The Siemens 3RT2325-1AL20 is a robust and versatile 4-pole AC-1 contactor designed for efficient switching of non-inductive or weakly inductive loads in industrial environments. Part of the trusted Siemens SIRIUS 3RT2 series, this size S0 contactor offers high performance, reliability, and ease of integration into various control panel configurations. With a 35 A (at 400 V / 40 °C) current rating, a 230 V AC (50/60 Hz) coil, and integrated 1 NO + 1 NC auxiliary contacts with secure screw terminals, the 3RT2325-1AL20 is an ideal solution for a wide range of applications, including load disconnection, power generation plant integration, and transfer switching.

Overview

The Siemens 3RT2325-1AL20 contactor is engineered to meet stringent international standards, ensuring safe and dependable operation. Its compact S0 size makes it suitable for space-conscious control panels, while its durable construction guarantees long-term performance. The inclusion of auxiliary contacts provides valuable feedback and control options for complex systems.

Function

The Siemens 3RT2325-1AL20 contactor serves as an electro-mechanical switch, primarily used for remotely controlling and switching electrical circuits. Its main functions include:

• Switching AC-1 Loads: Ideal for resistive loads, heating, and non-inductive circuits.
• Disconnecting Loads: Provides a reliable means to isolate equipment or entire sections from the power grid.
• Power Generation Plant Integration: Facilitates the connection and disconnection of power generation units.
• Transfer Switching: Enables seamless switching between different power sources.

Benefit

• High Reliability: Manufactured by Siemens, a global leader in industrial automation, ensuring consistent and dependable performance.
• Versatile Application: Suitable for a broad range of AC-1 switching tasks.
• Easy Integration: Standardized size S0 and screw terminals simplify installation and wiring into control panels.
• Enhanced Control: Integrated 1 NO + 1 NC auxiliary contacts offer flexibility for interlocking, signaling, and control circuit applications.
• Robust Construction: Designed for demanding industrial environments, ensuring a long service life.
• Standards Compliant: Meets international safety and performance standards for peace of mind.
• Accessory Compatibility: Compatible with a range of Siemens SIRIUS accessories for extended functionality (e.g., surge suppressors, overload relays, additional auxiliary switches).

Protection and Safety Features

The Siemens 3RT2325-1AL20 contactor is designed with comprehensive protection considerations:

• Short-Circuit and Overload Protection: All connections (main, auxiliary, control supply) must be protected using appropriate measures. Refer to technical product data sheets and configuration manuals for detailed guidance on device combinations (e.g., with overload relays or circuit breakers).
• Overvoltage Protection: The 3RT23 series contactors can be retrofitted with external surge suppressors (RC elements, varistors, diodes) for damping opening surges in the coil, which can be ordered separately as accessories.
• Electromagnetic Compatibility (EMC): Fulfills requirements for environment category A, ensuring reliable operation in typical industrial settings.

Connection Methods

• Main Circuit: Features robust screw terminals for secure and reliable connection of power cables.
• Auxiliary and Control Circuit: Equipped with screw terminals for straightforward wiring of control signals and auxiliary functions.

Motor Protection & Overload Relays

For applications requiring motor protection against overload, the Siemens 3RT2325-1AL20 contactor is compatible with Siemens 3RU2 thermal overload relays or 3RB3 electronic overload relays, which can be directly mounted to the contactor.

Operating Mechanism & Damping

The 3RT2325-1AL20 features a conventional AC operating mechanism, controlled via the A1-A2 terminals. For specific applications requiring coil damping, optional surge suppressors can be added, though it’s important to note that damping may slightly increase break times and delay times of contacts.

Maintenance & Accessories

• Solenoid Coil Replacement: The solenoid coil of the 3RT2325-1AL20 can be replaced for maintenance purposes.
• Expandable Auxiliary Contacts: The basic unit can be expanded with additional auxiliary switches to meet specific control requirements.
• Wide Range of Accessories: A full range of accessories and spare parts for SIRIUS 3RT2 contactors are available, including surge suppressors, additional auxiliary switches, and more.

Application

The Siemens 3RT2325-1AL20 contactor is ideally suited for:

• Four-pole switching of weak or non-inductive loads (AC-1)
• Disconnecting loads or power generation plants from the grid
• Transfer switching applications
• General industrial control systems requiring reliable AC-1 switching

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