Overview
The Siemens SIRIUS 3RT2326-2AF00 is a high-performance 4-pole contactor designed for switching non-inductive or weakly inductive loads (AC-1 applications). Engineered to meet rigorous industrial standards including IEC 60947, this robust contactor offers reliable operation in demanding environments. With a rated current of 40A at 400V/40°C, a 110V AC (50Hz) coil, and integrated 1 Normally Open (NO) + 1 Normally Closed (NC) auxiliary contacts, it provides essential control and switching capabilities for a wide range of industrial automation, power distribution, and load management systems. Its convenient spring-loaded terminals simplify wiring, making it an ideal choice for efficient installation and maintenance in control panels and electrical cabinets.
Function
- 4-Pole Switching (AC-1): Designed for switching four separate circuits or phases, making it suitable for applications involving weak or non-inductive loads such as heating, lighting, and general power distribution.
- Load Disconnection: Effectively disconnects loads or power generation plants from the electrical grid, ensuring safety and control.
- Transfer Switching: Capable of facilitating transfer switching operations, providing flexibility in power management.
- Control Circuit Integration: Equipped with 1 NO + 1 NC auxiliary contacts for seamless integration into control circuits, enabling interlocking, signaling, and feedback functions.
- Coil Control: Operates with a 110V AC, 50Hz control supply voltage for precise and reliable switching.
Benefit
- Enhanced Reliability: Built to IEC 60947 standards, ensuring dependable performance and long operational life in industrial settings.
- Easy Installation: Features spring-loaded terminals for quick, secure, and tool-free wiring, reducing installation time and labor costs.
- Space-Saving Design (Size S0): Compact footprint allows for efficient use of space within control cabinets and electrical enclosures.
- Versatile Application: Ideal for a broad spectrum of AC-1 applications, including HVAC systems, lighting circuits, heating elements, and general power switching.
- Integrated Auxiliary Contacts: The built-in 1 NO + 1 NC auxiliary contacts provide immediate feedback and control possibilities without the need for additional modules.
- Scalable Protection: Compatible with Siemens 3RU2 thermal overload relays or 3RB3 electronic overload relays for comprehensive motor and load protection.
- Electromagnetic Compatibility (EMC): Fulfills requirements for environment category A, minimizing interference in industrial environments.
Connection Methods:
- Main Circuit: Spring-loaded terminals.
- Auxiliary and Control Circuit: Screw terminals.
Maintenance and Accessories:
- Solenoid Coil Replacement: Possible for 3RT23 contactors.
- Auxiliary Contact Expansion: Basic units can be expanded with additional auxiliary switches (permissible configuration must be observed).
- Accessories & Spare Parts: A wide range of accessories and spare parts are available for SIRIUS 3RT2 contactors and 3RH2 contactor relays (refer to Siemens documentation).













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