Siemens SIRIUS 3RT2325-2AB00 Contactor 4-Pole, AC-1, 35A, 24V AC, Spring-Loaded Terminal Original Brand New

Overview

The Siemens SIRIUS 3RT2325-2AB00 is a high-performance 4-pole contactor designed for reliable switching of non-inductive or weakly inductive loads (AC-1) up to 35 Amperes at 400 V and 40 °C. This robust Size S0 contactor features a 24 V AC, 50 Hz control supply voltage, making it suitable for a wide range of industrial control applications. Equipped with convenient spring-loaded terminals for quick and secure wiring, and integrated 1 Normally Open (NO) + 1 Normally Closed (NC) auxiliary contacts, the 3RT2325-2AB00 offers essential functionality and ease of integration into your electrical systems. Part of the renowned Siemens SIRIUS modular system, it ensures compatibility and expandability for your control panel needs.

Key Features & Benefit

• Efficient Load Switching (AC-1): Specifically engineered for 4-pole switching of resistive and non-inductive loads, making it ideal for heating, lighting, and distribution applications.
• High Current Rating: Handles up to 35 Amperes (at 400 V / 40 °C), providing ample capacity for demanding AC-1 circuits.
• Reliable 24V AC Control: Standard 24V AC, 50 Hz coil ensures consistent and dependable operation in common industrial control environments.
• Integrated Auxiliary Contacts: Comes with 1 NO + 1 NC auxiliary contacts, offering immediate feedback and control possibilities for interlocking or signaling.
• Spring-Loaded Terminals: Facilitates fast, tool-free, and vibration-proof wiring, significantly reducing installation time and ensuring a secure connection.
• Compact Size S0: Space-saving design for efficient utilization of control cabinet real estate.
• Robust Construction: Built to Siemens' rigorous quality standards for long-term durability and performance in challenging industrial settings.
• Standards Compliance: Adheres to international standards including IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1, ensuring safety and global compatibility.
• Expandable System: Part of the Siemens SIRIUS modular system, allowing for easy integration with other SIRIUS components like overload relays and additional auxiliary switches.

Function

• Controlling Non-Inductive Loads: Primarily functions as a switch for disconnecting or connecting weak or non-inductive AC-1 loads such as resistive heaters, lighting circuits, and distribution systems.
• Power Disconnection: Can be used to disconnect loads or power generation plants from the electrical grid.
• Transfer Switching: Capable of performing transfer switching operations in suitable applications.
• Control Circuit Integration: Its integrated auxiliary contacts allow for feedback, interlocking, and status indication within control circuits.

Standards & Protection:

The Siemens 3RT2325-2AB00 contactor conforms to leading international standards, ensuring reliable and safe operation:

• IEC 60947-1: General rules for low-voltage switchgear and controlgear.
• IEC 60947-4-1: Contactors and motor-starters – Electromechanical contactors and motor-starters.
• IEC 60947-5-1: Control circuit devices and switching elements – Electromechanical control circuit devices (for auxiliary switches).

Protection of Connections:

All connections to the contactor must be adequately protected against overload and short circuits.

• Main Connections: Refer to the technical product data sheet for specific short-circuit and overload protection details for free-standing contactors. For device combinations (e.g., with overload relays or circuit breakers), consult the Digital Configuration Manual for load feeders or the Configuration Manual for load feeders.
• Auxiliary Connections: Short-circuit and overload protection information for auxiliary contacts can be found in the technical product data sheet.
• Control Supply Voltage Connections: Protection must align with relevant standards for control panel configuration, considering cable dimensioning and load characteristics (inrush current, holding power). Suitable power supplies with current-limiting functions or miniature/circuit breakers are recommended.
• Overvoltage Protection: 3RT23 contactors can be retrofitted with surge suppressors (RC elements, varistors, diodes, or diode assemblies) to dampen opening surges in the coil. Note that damping may increase break times and delay times of contacts.

Connection Methods:

• Main Circuit: Features spring-loaded terminals, including a convenient plug-in design for device connectors.
• Auxiliary and Control Circuit: Equipped with reliable screw terminals.

Electromagnetic Compatibility (EMC):

The contactor meets the requirements for environment category A, ensuring stable performance in typical industrial electromagnetic environments. When used with frequency converters, specific configuration notes from the Equipment Manual must be observed.

Contact Reliability of Auxiliary Contacts:

The auxiliary contacts of 3RT contactors are designed for high contact reliability, especially suitable for switching voltages $\le$ 110 V and currents $\le$ 100 mA. They are particularly effective for solid-state circuits with currents $\ge$ 1 mA at voltages of 17 V and higher.

Motor Protection Compatibility:

For overload protection of motors controlled by 3RT23 contactors, Siemens recommends mounting 3RU2 thermal overload relays or 3RB3 electronic overload relays directly onto the contactor.

Operating Mechanism:

The Siemens 3RT2325-2AB00 features a conventional AC operating mechanism with a 24 V AC, 50 Hz control supply voltage. Control is via connections A1-A2.

Maintenance & Expandability:

• Solenoid Coil: The solenoid coil is replaceable, extending the lifespan of the contactor.
• Auxiliary Contacts: The basic unit includes integrated 1 NO + 1 NC auxiliary contacts. The contactor can be further expanded with additional auxiliary switches, adhering to permissible configurations. Refer to the Auxiliary switches, instantaneous → Overview for detailed information on fitting auxiliary switches for 3RT23 contactors.

Accessories and Spare Parts:

A wide range of accessories and spare parts are available for the SIRIUS 3RT2 contactors, including surge suppressors, additional auxiliary switches, and various connection components. For a complete list, refer to Accessories and spare parts for SIRIUS 3RT2 contactors and SIRIUS 3RH2 contactor relays.

Application

The Siemens 3RT2325-2AB00 contactor is a versatile component for various industrial applications, including:

• Four-pole switching of weak or non-inductive loads (AC-1): Ideal for resistive loads, heating elements, lighting systems, and general power distribution.
• Disconnecting loads or power generation plants from the grid: Provides a reliable means of isolation.
• Transfer switching: Suitable for applications requiring switching between different power sources or loads.

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