Siemens 3RT2325-2AL20 Contactor 4-Pole AC-1, 35A, 230V AC, Spring-Loaded Terminal Original Brand New

Siemens 3RT2325-2AL20 Contactor: Reliable 4-Pole AC-1 Switching Solution

The Siemens 3RT2325-2AL20 is a high-performance 4-pole AC-1 contactor, engineered for reliable switching of weak or non-inductive loads. Part of the renowned SIRIUS series, this contactor offers robust construction, versatile functionality, and easy integration into various industrial applications. With a rated current of 35 A at 400 V / 40 °C, a 230 V AC (50/60 Hz) control voltage, and convenient spring-loaded terminals, the 3RT2325-2AL20 is an ideal choice for load disconnection, power generation plant integration, and transfer switching.

Overview

The Siemens 3RT2325-2AL20 contactor is a compact and efficient switching device, designed to meet the rigorous demands of industrial environments. Its 4-pole configuration and AC-1 utilization category make it perfectly suited for applications involving resistive loads, heating, or lighting. The integrated 1 NO + 1 NC auxiliary contacts provide essential feedback and control capabilities, enhancing system flexibility.

Key Features & Benefit

• High Performance AC-1 Switching: Specifically designed for switching non-inductive or weakly inductive loads up to 35 A, ensuring efficient and safe operation.
• Reliable Control: Operates with a standard 230 V AC (50/60 Hz) control supply voltage, making it compatible with common industrial control systems.
• Integrated Auxiliary Contacts: Features 1 Normally Open (NO) and 1 Normally Closed (NC) auxiliary contact, providing critical status indication and interlocking possibilities without requiring additional modules.
• Efficient Spring-Loaded Terminals: Offers quick, secure, and vibration-resistant wiring, reducing installation time and maintenance efforts compared to traditional screw terminals.
• Compact Size S0: Space-saving design for optimized panel layouts, contributing to more efficient control cabinet construction.
• Enhanced Safety & Protection: Designed with provisions for short-circuit, overload, and overvoltage protection, adhering to international standards for safe operation.
• Robust & Durable: Built to IEC standards (IEC 60947-1, IEC 60947-4-1, IEC 60947-5-1 for auxiliary switches), ensuring long-term reliability and performance in demanding industrial conditions.
• Flexible Application: Suitable for four-pole switching, disconnecting loads, power generation plant integration, and transfer switching applications.

Function

• Power Switching: The primary function is to establish or interrupt current flow in main circuits for AC-1 category loads.
• Auxiliary Signaling: The integrated 1 NO + 1 NC auxiliary contacts provide electrical feedback on the contactor’s switching status to control systems or other devices.
• System Integration: Designed for seamless integration into larger control panels and automation systems.

Standards & Protection:

The Siemens 3RT2325-2AL20 conforms to major international standards including IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1 (for auxiliary switches), ensuring high quality and safety.

• Protection of Device Connections: All connections require appropriate protection against overload and short circuits. Refer to the technical product data sheet for specific guidance on free-standing contactors. For device combinations with overload relays or circuit breakers, consult the Digital Configuration Manual for load feeders.
• Auxiliary and Control Circuit Protection: Short-circuit and overload protection of auxiliary contacts is detailed in the technical product data sheet. For control supply voltage connections, consider relevant standards for cable dimensioning and select suitable power supplies (e.g., with current-limiting function) and protection devices.
• Overvoltage Protection: The 3RT23 series contactors can be retrofitted with surge suppressors (RC elements, varistors, diodes, or diode assemblies) to dampen opening surges in the coil, available as separate accessories. Note that damping may increase break times.
• Electromagnetic Compatibility (EMC): Fulfills requirements for environment category A. For use with frequency converters, observe configuration notes in the Equipment Manual.

Connection Methods:

• Main Circuit: Spring-loaded terminals for convenient and reliable connection.
• Auxiliary and Control Circuit: Screw terminals for secure wiring.

Contact Reliability of Auxiliary Contacts:

The auxiliary contacts of 3RT contactors are engineered for high contact reliability, especially when switching low voltages (≤ 110 V) and currents (≤ 100 mA). They are particularly suitable for solid-state circuits with currents ≥ 1 mA at voltages of 17 V and higher.

Motor Protection:

While the 3RT2325-2AL20 is primarily for AC-1 applications, for protection against overload in motor applications, 3RU2 thermal overload relays or 3RB3 electronic overload relays can be directly mounted onto 3RT23 contactors.

Operating Mechanism:

This contactor features a conventional AC operating mechanism, controlled via the A1-A2 control supply voltage connection.

Maintenance & Accessories:

• Coil Replacement: The solenoid coil of the 3RT2325-2AL20 can be replaced, extending the lifespan of the unit.
• Auxiliary Contact Expansion: The basic unit can be expanded with additional auxiliary switches. Refer to the Auxiliary switches, instantaneous → Overview for detailed information on permissible configurations.
• Accessories & Spare Parts: A wide range of accessories and spare parts are available for 3RT23 contactors, including surge suppressors and additional auxiliary switches. Consult the Accessories and spare parts for SIRIUS 3RT2 contactors and SIRIUS 3RH2 contactor relays for a complete list.

Application

The 3RT2325-2AL20 is ideal for:

• Four-pole switching of weak or non-inductive loads (AC-1).
• Disconnecting loads or power generation plants from the grid.
• Transfer switching applications.

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