Siemens SIRIUS 3RT2344-1AF00 Contactor 4-Pole, AC-1, 110A, 110V AC Coil, S3 Size Original Brand New

Siemens SIRIUS 3RT2344-1AF00 Contactor – Robust 4-Pole Solution for AC-1 Application

The Siemens SIRIUS 3RT2344-1AF00 is a high-performance 4-pole contactor designed for reliable switching of weak or non-inductive loads (AC-1). With a current rating of 110 A at 400 V / 40 °C, this industrial-grade contactor is an essential component for various power control applications, including disconnecting loads from the grid and transfer switching. Its 110 V AC, 50 Hz coil ensures efficient operation, while the integrated 1 NO + 1 NC auxiliary contacts provide versatile control options. Featuring robust screw terminals and a compact S3 size, the 3RT2344-1AF00 offers easy integration and dependable performance in demanding environments.

Overview

The Siemens SIRIUS 3RT2344-1AF00 is part of the renowned Siemens SIRIUS modular system, providing a flexible and efficient solution for switching AC-1 loads. This 4-pole contactor is built to the highest quality standards, ensuring long-term reliability and operational safety. It is particularly well-suited for applications where robust switching of resistive or slightly inductive loads is required, such as heating systems, lighting circuits, and power distribution in industrial and commercial settings.

Key Features & Benefit

• High Current Rating: Rated for 110 A at 400 V / 40 °C (AC-1), capable of handling significant non-inductive loads.
• 4-Pole Configuration: Provides comprehensive switching capabilities for multi-phase or complex circuits.
• Versatile Coil Voltage: Operates reliably with a 110 V AC, 50 Hz control supply, common in many industrial applications.
• Integrated Auxiliary Contacts: Includes 1 NO (Normally Open) + 1 NC (Normally Closed) auxiliary contacts for flexible control, signaling, and interlocking functions.
• Robust Screw Terminals: Ensures secure and reliable electrical connections, facilitating straightforward wiring.
• Compact S3 Size: Optimized for space-saving installation in control panels and enclosures.
• Compliance with Standards: Manufactured in accordance with international standards, including IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1 (for auxiliary switches), guaranteeing safety and performance.
• Expandable Design: Can be easily expanded with additional auxiliary switches and other accessories to meet evolving application requirements.
• Electromagnetic Compatibility (EMC): Fulfills requirements for environment category A, ensuring reliable operation in industrial environments.
• Long-lasting Performance: Designed for durability and consistent operation in demanding industrial settings.

Function

The Siemens 3RT2344-1AF00 contactor performs the following primary functions:

• Switching AC-1 Loads: Efficiently makes and breaks circuits for weak or non-inductive loads, such as resistance furnaces, heaters, and lighting.
• Disconnecting Loads from Grid: Provides a reliable means to isolate electrical loads or power generation plants from the main power supply.
• Transfer Switching: Can be used in conjunction with other contactors for changeover applications, such as automatic transfer switches.
• Control Circuit Integration: The integrated auxiliary contacts allow for seamless integration into control circuits for status indication, interlocking, and sequence control.

Protection and Safety:

• Short-circuit and Overload Protection: All connections must be protected using suitable measures. Refer to the technical product data sheet for specific guidance on protecting free-standing contactors and device combinations (e.g., with overload relays or circuit breakers).
• Overvoltage Protection: The 3RT23 contactors can be retrofitted with surge suppressors (RC elements, varistors, diodes, or diode assemblies) to dampen opening surges in the coil.

Connection Methods:

• Main Circuit: Features robust screw terminals with a box terminal design. For 3RT234 contactors, direct connection to the connecting bar is possible with cable lugs after removing the box terminal.
• Auxiliary and Control Circuit: Utilizes reliable screw terminals for easy and secure wiring.

Contact Reliability:

• The auxiliary contacts of the 3RT23 contactors are designed to ensure high contact reliability, especially suitable for switching low voltages (≤ 110 V) and low currents (≤ 100 mA), as well as solid-state circuits with currents ≥ 1 mA at 17 V and higher.

Motor Protection (Applicability):

• While primarily an AC-1 contactor, for overload protection of connected equipment, 3RU2 thermal overload relays or 3RB3 electronic overload relays can be mounted directly onto 3RT23 contactors.

Accessories and Spare Parts:

A wide range of accessories and spare parts are available for the SIRIUS 3RT23 series, including:

• Additional auxiliary switches (instantaneous)
• Surge suppressors (RC elements, varistors, diodes)
• Solenoid coils (replaceable for this model)

For a complete list of compatible accessories and spare parts, please refer to the Siemens SIRIUS 3RT2 contactors and SIRIUS 3RH2 contactor relays accessory catalog or contact Turll for assistance.

Application

• Switching heating elements in industrial furnaces and ovens.
• Controlling lighting circuits in large commercial buildings or industrial facilities.
• Managing power supply to non-inductive loads like resistance loads in test benches.
• Used in power factor correction units for capacitor switching (if designed for AC-1).
• Integration into automatic transfer switches (ATS) for power source changeover.

For more information on Siemens industrial control components and other high-quality electrical products, please visit Turll.