Siemens SIRIUS 3RT2326-1AF00 Contactor 4-Pole AC-1, 40A, 110V AC Coil, S0 Size, Screw Terminal Original Brand New

Overview

The Siemens SIRIUS 3RT2326-1AF00 is a high-performance 4-pole contactor designed for reliable switching of AC-1 (non-inductive) loads. Part of the renowned SIRIUS 3RT23 series, this robust Size S0 contactor boasts a 40A rating at 400V/40°C and features a 110V AC, 50Hz operating coil. Equipped with convenient screw terminals for both main and auxiliary circuits, it includes 1 normally open (NO) and 1 normally closed (NC) integrated auxiliary contact for enhanced control flexibility.

Built to meet stringent industrial standards such as IEC 60947, the 3RT2326-1AF00 is an essential component for various power switching applications, including disconnecting loads, power generation plants from the grid, and transfer switching. Its compact design and reliable performance make it an ideal choice for a wide range of industrial control panels and systems.

Key Features & Benefit

• Robust AC-1 Performance: Rated for 40A at 400V / 40°C, making it ideal for switching resistive and non-inductive loads.
• 4-Pole Configuration: Provides versatile switching capabilities for multi-phase or multi-circuit applications.
• Integrated Auxiliary Contacts: Comes with 1 NO + 1 NC auxiliary contacts, simplifying control circuit design and enabling flexible interlocking or signaling.
• 110V AC Coil (50Hz): Standard industrial control voltage for straightforward integration into existing systems.
• Screw Terminals: Ensures secure and reliable electrical connections for both main and auxiliary circuits.
• Compact Size S0: Space-efficient design allows for optimal use of panel space.
• High Contact Reliability: Auxiliary contacts are designed for reliable switching of low voltages (≤ 110V) and currents (≤ 100mA), suitable for solid-state circuits.
• Standards Compliant: Meets international standards including IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1 (for auxiliary switches), ensuring safety and performance.
• Expandable Functionality: Can be easily expanded with additional auxiliary switches for increased control options.
• Overload Protection Integration: Designed to seamlessly integrate with Siemens 3RU2 thermal overload relays or 3RB3 electronic overload relays for comprehensive motor protection (when applicable).
• Durable Construction: Built for industrial environments, offering long-term reliability and performance.

Function

• Switching Non-Inductive Loads: Primarily used for switching resistive loads like heaters, lighting, or for general AC-1 applications.
• Power Disconnection: Capable of disconnecting loads or power generation plants from the electrical grid.
• Transfer Switching: Suitable for applications requiring switching between different power sources or circuits.
• Control Circuit Integration: Auxiliary contacts provide feedback and control signals within automated systems.
• Overload Protection (with external relay): When combined with a compatible overload relay (e.g., Siemens 3RU2, 3RB3), it forms a complete motor starter for overload protection.
• Overvoltage Protection (with optional accessory): Coil damping via RC elements, varistors, or diodes can be retrofitted to suppress opening surges.

Application

The Siemens 3RT2326-1AF00 Contactor is ideal for a wide range of industrial and commercial applications requiring reliable switching of non-inductive loads, including:

• Heating and ventilation systems
• Lighting circuits
• Capacitor banks
• Resistive loads in industrial machinery
• Power distribution panels
• Backup power systems (transfer switching)
• General purpose power switching in automation and control systems

Protection and Safety:

• Short-Circuit and Overload Protection: All connections (main, auxiliary, control) must be protected by suitable external measures such as circuit breakers or fuses, in accordance with relevant standards and regulations (e.g., for cable dimensioning).
• Overvoltage Protection (Control Supply): The 3RT23 contactors can be retrofitted with surge suppressors (RC elements, varistors, diodes) to dampen opening surges in the coil, protecting sensitive control circuitry.
• Contact Reliability: Auxiliary contacts offer high contact reliability, especially important for low-voltage and low-current solid-state circuits.

Connection Methods:

• Main Circuit: Screw terminals for secure wire connections.
• Auxiliary and Control Circuit: Screw terminals for reliable connections.

Accessories and Spare Parts: A wide range of accessories and spare parts are available for the SIRIUS 3RT23 series, including additional auxiliary switches, surge suppressors, and various connection options. For a comprehensive list, please refer to the Siemens SIRIUS 3RT2 contactors and 3RH2 contactor relays accessories catalog.

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