Siemens 3RT2326-2AC20 Contactor 4-Pole AC-1, 40A, 24V AC, Spring-Loaded Terminal, Size S0 Original Brand New

Overview

The Siemens 3RT2326-2AC20 is a robust and highly reliable 4-pole AC-1 contactor, part of the SIRIUS 3RT2 series, engineered for efficient switching of non-inductive or weakly inductive loads up to 40 Amperes. Designed for demanding industrial environments, this contactor features a 24V AC (50/60 Hz) operating mechanism, integrated 1 Normally Open (NO) and 1 Normally Closed (NC) auxiliary contacts, and convenient spring-loaded terminals for quick and secure wiring. Its compact Size S0 form factor ensures space-saving integration into control panels. Compliant with international standards like IEC 60947, the 3RT2326-2AC20 offers exceptional performance and ease of use, making it an ideal choice for various power switching applications, including disconnecting loads or power generation plants from the grid and transfer switching.

Key Features & Benefit

• High Performance AC-1 Switching: Rated for 40A at 400V / 40°C, perfect for resistive and non-inductive loads, ensuring efficient power control.
• 4-Pole Configuration: Provides comprehensive switching capabilities for multi-phase or multiple circuit applications.
• Integrated Auxiliary Contacts (1 NO + 1 NC): Enhances functionality for control and signaling circuits, reducing the need for additional components.
• 24V AC Coil (50/60 Hz): Standard control voltage for easy integration into existing control systems.
• Spring-Loaded Terminals: Offers fast, vibration-proof, and maintenance-free connections, saving installation time and improving reliability.
• Compact Size S0: Optimizes panel space, allowing for more efficient designs.
• Robust and Reliable: Built to Siemens’ high-quality standards for long-lasting operation in industrial settings.
• Compliance with Global Standards: Adheres to IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1, ensuring international compatibility and safety.
• Enhanced Contact Reliability: Auxiliary contacts are specially designed for low voltage and low current applications (e.g., solid-state circuits), ensuring dependable signaling.

Function

• Four-pole Switching: Efficiently controls weak or non-inductive loads in AC-1 applications.
• Load Disconnection: Ideal for isolating loads or power generation plants from the electrical grid.
• Transfer Switching: Facilitates seamless transitions between different power sources or circuits.
• Control and Signaling: Integrated auxiliary contacts provide feedback and control options for automation systems.

Protection and Connectivity:

• Short-circuit and Overload Protection: Connections must be protected using suitable measures. Refer to technical product data sheets and configuration manuals for detailed guidance on main, auxiliary, and control supply voltage connections.
• Overvoltage Protection: Can be retrofitted with surge suppressors (RC elements, varistors, diodes, or diode assemblies) for damping opening surges in the coil (ordered separately as accessories).
• Connection Methods: Main circuit features spring-loaded terminals with convenient plug-in design for device connectors. Auxiliary and control circuits utilize screw terminals.

Compatibility and Accessories:

• Motor Protection: Compatible with Siemens 3RU2 thermal overload relays or 3RB3 electronic overload relays for comprehensive motor protection.
• Operating Mechanism: Features a conventional AC operating mechanism.
• Solenoid Coil Replacement: Solenoid coil can be replaced.
• Auxiliary Switches: Basic units include integrated auxiliary contacts and can be expanded with additional auxiliary switches (permissible configuration must be observed).
• Accessories and Spare Parts: A wide range of accessories and spare parts are available for SIRIUS 3RT2 contactors (refer to relevant accessory documentation).

Application

The Siemens 3RT2326-2AC20 contactor is ideal for a broad range of industrial applications requiring reliable switching of non-inductive loads, including:

• Heating and lighting circuits
• Capacitor switching
• Transformer control
• Resistive load switching
• Power distribution systems
• Building automation
• General industrial machinery

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