Siemens 3RT2344-1AN20 Contactor, 4-Pole AC-1, 110A, 220V AC Coil, S3 Size Original Brand New

Siemens 3RT2344-1AN20 SIRIUS Contactor – Reliable 4-Pole AC-1 Switching for Industrial Application

The Siemens 3RT2344-1AN20 is a high-performance SIRIUS 3RT2 series contactor designed for robust switching of AC-1 (non-inductive or slightly inductive) loads up to 110 Amperes at 400V / 40 °C. This 4-pole contactor is ideal for applications requiring the switching of resistive loads, heating, or distribution circuits.

Key Features & Benefit

• High Current Rating: Handles up to 110A for demanding AC-1 applications.
• 4-Pole Design: Provides comprehensive control for multi-phase systems or multiple circuits.
• 220V AC Coil: Operates efficiently with standard 220V AC, 50/60 Hz control voltage.
• Integrated Auxiliary Contacts: Equipped with 1 normally open (NO) and 1 normally closed (NC) auxiliary contact for feedback and control circuit integration.
• Secure Screw Terminals: Ensures reliable and straightforward wiring connections.
• Compact S3 Size: Optimized for space-saving installation in control panels.
• IEC Compliant: Manufactured to meet rigorous international standards including IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1 (for auxiliary switches), ensuring safety and performance.

Overview

The Siemens 3RT2344-1AN20 contactor is part of the renowned SIRIUS family, known for its reliability and versatility in industrial automation. This S3 size contactor offers excellent performance for switching weak or non-inductive loads, disconnecting loads or power generation plants from the grid, and transfer switching applications.

Comprehensive Protection:

The design prioritizes the protection of device connections against short circuits, overloads, and overvoltages. For the main connections, refer to the technical product data sheet for free-standing contactor protection. For device combinations with overload relays or circuit breakers (motor feeders), consult the Digital Configuration Manual for load feeders. Auxiliary and control circuit connections require appropriate protection, and considerations for suitable power supplies with current-limiting functions are highlighted. Overvoltage protection at the control supply voltage connection can be achieved by retrofitting RC elements, varistors, diodes, or diode assemblies (ordered separately as accessories – see Surge Suppressors).

Flexible Connection Methods:

• Main Circuit: Features screw terminals with a box terminal. Direct connection to the connecting bar with cable lugs is possible when the box terminal is removed.
• Auxiliary and Control Circuit: Utilizes reliable screw terminals for easy integration.

Electromagnetic Compatibility (EMC):

The contactor fulfills the requirements for environment category A, ensuring robust performance in industrial settings. When used with frequency converters, specific configuration notes from the Equipment Manual should be observed.

High Contact Reliability:

The auxiliary contacts of the 3RT23 contactors are engineered for high contact reliability, particularly for switching voltages $\le 110V$ and currents $\le 100mA$. They are especially suitable for solid-state circuits with currents $\ge 1mA$ at voltages of $17V$ and higher.

Motor Protection Compatibility:

For overload protection, the 3RT2344-1AN20 is compatible with 3RU2 thermal overload relays or 3RB3 electronic overload relays, which can be directly mounted to the contactor.

Operating Mechanism & Maintenance:

This 3RT23 contactor features a conventional AC operating mechanism. Solenoid coil replacement is possible, ensuring extended product lifespan. For 3RT233 contactors, contacts can also be replaced.

Expandable Auxiliary Contacts:

The 3RT2344-1AN20 basic unit comes with two integrated auxiliary contacts (1 NO + 1 NC). It can be further expanded using additional auxiliary switches (permissible configuration must be observed) for enhanced control flexibility.

Accessories & Spare Parts:

A wide range of accessories and spare parts are available for the 3RT231 to 3RT234 contactors. Refer to the “Accessories and spare parts for SIRIUS 3RT2 contactors and SIRIUS 3RH2 contactor relays” section for detailed information and ordering data.

Application

The Siemens 3RT2344-1AN20 contactor is ideal for:

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

For more Siemens industrial control products and solutions, visit Turll.com.