Siemens 3RT2325-2CK60 Contactor 4-Pole AC-1, 35A, 110/120V Coil, Spring-Loaded Terminal Original Brand New

Overview

The Siemens 3RT2325-2CK60 is a robust and reliable 4-pole AC-1 contactor, designed for switching non-inductive or weakly inductive loads up to 35 A at 400 V / 40 °C. This versatile device features a control supply voltage of 110 V AC (50 Hz) / 120 V AC (60 Hz) and comes equipped with a plugged-in varistor for enhanced coil protection against overvoltage. Its integrated 1 NO + 1 NC auxiliary contact set provides flexible control options, while the innovative spring-loaded terminals ensure fast, secure, and vibration-resistant wiring. With its compact S0 size, this contactor is ideal for a wide range of industrial control panel applications, offering dependable performance in accordance with international standards.

Key Features & Benefit

• High Performance for AC-1 Applications: Rated for 35 A at 400 V / 40 °C, perfect for switching resistive loads, heating, and general power distribution.
• Integrated Overvoltage Protection: Features a plugged-in varistor to protect the coil from damaging voltage surges, extending product lifespan and improving system reliability.
• Versatile Control Voltage: Operates on 110 V AC (50 Hz) and 120 V AC (60 Hz), providing compatibility with common industrial control systems.
• Flexible Auxiliary Contacts: Includes 1 Normally Open (NO) and 1 Normally Closed (NC) auxiliary contact for diverse signaling, interlocking, and control circuit requirements.
• Efficient Spring-Loaded Terminals: Offers quick, easy, and reliable wiring connections, reducing installation time and maintenance efforts compared to screw terminals.
• Compact S0 Size: Space-saving design for efficient panel layout and integration into tight enclosures.
• Robust & Reliable: Engineered to Siemens’ high-quality standards for consistent and long-lasting operation in demanding industrial environments.
• Standard-Compliant: Adheres to essential international standards including IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1, ensuring safety and compatibility.

Function

The Siemens 3RT2325-2CK60 contactor performs the critical function of electrically connecting or disconnecting a load from the power supply in control circuits.

• Power Switching (AC-1): Primarily used for four-pole switching of weak or non-inductive loads. This includes applications such as:
  • Switching heating elements.
  • Controlling lighting circuits.
  • Operating resistive loads.
  • Disconnecting loads or power generation plants from the grid.
  • Implementing transfer switching.
• Control Circuit Integration: The integrated 1 NO + 1 NC auxiliary contacts allow for feedback, interlocking, and activation of other components within the control system.
• Overvoltage Damping: The pre-installed varistor within the coil circuit effectively dampens opening surges, protecting sensitive control components and the contactor coil itself.

Protection & Electromagnetic Compatibility

• Short-Circuit and Overload Protection:
  • Main connections require external short-circuit and overload protection (refer to technical product data sheet for free-standing contactors or Digital/Configuration Manual for load feeders with overload relays/circuit breakers).
  • Auxiliary connections require suitable protection (refer to technical product data sheet).
  • Control supply voltage connections should be protected according to relevant standards, considering load characteristics (inrush current, holding power) and potentially using current-limiting power supplies or miniature/circuit breakers.
• Overvoltage Protection (Coil): The integrated varistor provides effective damping of opening surges. For 3RT23 contactors supplied without a coil circuit, RC elements, varistors, diodes, or diode assemblies can be retrofitted (accessories sold separately). Note: Damping increases break times.
• Electromagnetic Compatibility: Fulfills requirements for environment category A. Observe configuration notes in the Equipment Manual when used with frequency converters.

Connection Methods

• Main Circuit (3RT232 contactors): Spring-loaded terminals with convenient plug-in design for device connector.
• Auxiliary and Control Circuit: Screw terminals.

Contact Reliability of Auxiliary Contacts

Designed for high contact reliability, especially suitable for switching voltages $\le$ 110 V and currents $\le$ 100 mA. Ideal for solid-state circuits with currents $\ge$ 1 mA at a voltage of 17 V and higher.

Motor Protection

For overload protection of motors switched by 3RT23 contactors, 3RU2 thermal overload relays or 3RB3 electronic overload relays can be directly mounted.

Operating Mechanism & Maintenance

• Operating Mechanism Type: Conventional AC operating mechanism.
• Solenoid Coil Replacement: Possible for 3RT23 contactors.
• Spare Contacts: Only contacts for 3RT233 contactors can be replaced (not 3RT232).

Auxiliary Contact Expansion

The basic unit of 3RT232 contactors contains two integrated auxiliary contacts (1 NO + 1 NC). All basic units can be expanded with additional auxiliary switches, adhering to permissible configurations. Refer to “Auxiliary switches, instantaneous → Overview” for detailed information.

Accessories & Spare Parts

A wide range of accessories and spare parts are available for SIRIUS 3RT2 contactors and 3RH2 contactor relays. Please refer to the relevant Siemens documentation or contact your supplier for ordering data.

Application

The Siemens 3RT2325-2CK60 contactor is an excellent choice for applications requiring reliable 4-pole switching of non-inductive or weakly inductive loads (AC-1), including:

• Heating systems
• Lighting control
• Resistive loads
• Power distribution circuits
• Load disconnection from the grid
• Transfer switching operations

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