Siemens SIRIUS 3RT2326-2BF40 Contactor 4-Pole AC-1, 40A, 110V DC Coil, Spring-Loaded Terminal Original Brand New

Overview

The Siemens SIRIUS 3RT2326-2BF40 is a robust and reliable 4-pole power contactor designed for switching non-inductive or weakly inductive loads (AC-1) up to 40 Amperes at 400V / 40°C. This compact Size S0 contactor features a 110V DC operating mechanism, integrated 1 Normally Open (NO) + 1 Normally Closed (NC) auxiliary contacts, and convenient spring-loaded terminals for quick and secure wiring. Ideal for a wide range of industrial applications, the 3RT2326-2BF40 ensures high contact reliability and meets stringent international standards, including IEC 60947.

Key Features & Function

• 4-Pole Switching (AC-1): Specifically designed for switching non-inductive or weakly inductive loads in circuits like heating, lighting, and distribution systems. Can also be used for disconnecting loads or power generation plants from the grid and transfer switching.
• High Current Rating: Handles up to 40A at 400V / 40°C, providing ample capacity for various applications.
• 110V DC Coil: Features a reliable 110V DC operating mechanism for precise control.
• Integrated Auxiliary Contacts: Comes with 1 NO + 1 NC auxiliary contacts built into the basic unit, offering immediate feedback and control options.
• Spring-Loaded Terminals: Ensures fast, reliable, and vibration-resistant connections, reducing installation time and maintenance.
• Compact Size S0: Space-saving design for efficient panel layout.
• Standards Compliant: Adheres to IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1 (for auxiliary switches), guaranteeing safety and performance.
• Expandable Auxiliary Switches: Can be expanded with additional auxiliary switches to meet complex control requirements (observe permissible configurations).
• Motor Protection Compatibility: Seamlessly integrates with Siemens 3RU2 thermal overload relays or 3RB3 electronic overload relays for comprehensive motor protection (for AC-3 applications, refer to specialized 3RT23 versions).
• Electromagnetic Compatibility (EMC): Fulfills requirements for environment category A.
• Coil Replacement: The solenoid coil can be replaced for extended product life.

Benefit

• Enhanced Reliability: Built to Siemens’ high-quality standards, ensuring dependable operation and long service life.
• Simplified Wiring: Spring-loaded terminals offer quick, tool-free wiring, reducing installation errors and labor costs.
• Space Optimization: Compact S0 size allows for more efficient use of cabinet space.
• Versatile Application: Suitable for a broad range of AC-1 applications, offering flexibility in system design.
• Easy Integration: Designed for seamless integration into existing control panels and automation systems.
• Cost-Effective Maintenance: Replaceable coil contributes to a lower total cost of ownership.
• Safety & Compliance: Meets international safety standards, providing peace of mind for operators and installers.

Protection & Configuration Notes:

• Short-Circuit & Overload Protection: All connections require appropriate protection. Refer to the technical product data sheet and Digital/Configuration Manuals for detailed guidance on main connections, auxiliary connections, and control supply voltage protection.
• Overvoltage Protection: 3RT23 contactors can be retrofitted with surge suppressors (RC elements, varistors, diodes, or diode assemblies) for damping opening surges in the coil. Note that damping increases break and delay times.
• Contact Reliability: For switching low voltages (≤ 110V) and currents (≤ 100mA), 3RT/3RH auxiliary contacts ensure high contact reliability, especially suitable for solid-state circuits (≥ 1mA at ≥ 17V).
• Electromagnetic Compatibility: Observe configuration notes in the Equipment Manual when using contactors in environments with frequency converters.

Connection Methods:

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

Operating Mechanism Types:

• Conventional DC operating mechanism.

Accessories & Spare Parts:

• Compatible with a range of accessories and spare parts for SIRIUS 3RT2 contactors and SIRIUS 3RH2 contactor relays. Solenoid coil replacement is possible.

Application

• Four-pole switching of weak or non-inductive loads (AC-1)
• Disconnecting loads or power generation plants from the grid
• Transfer switching
• Industrial control panels
• Building automation systems
• Heating, ventilation, and air conditioning (HVAC) systems
• Lighting control

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