Siemens SIRIUS 3RT2025-2BF44 Power Contactor 17A, 7.5kW, 110V DC Coil with 2NO+2NC Aux Contacts, Spring-Loaded Original Brand New

Overview

The Siemens 3RT2025-2BF44 is a high-performance power contactor from the SIRIUS 3RT2 series, engineered for reliable and efficient switching of AC motors and other resistive loads. This robust 3-pole contactor is rated for AC-3e/AC-3 operation at 17 A and a power output of 7.5 kW at 400 V, making it ideal for a wide range of industrial applications.

Its compact size S0 design allows for space-saving installation in control cabinets, while the 110 V DC coil ensures reliable operation in various control systems. The integrated 2 NO + 2 NC auxiliary contacts provide enhanced flexibility for control and signaling circuits. Featuring innovative spring-loaded terminals, this contactor offers quick, secure, and vibration-proof wiring, reducing installation time and maintenance costs. The removable auxiliary switch adds to its versatility and ease of service.

Key Features & Benefit

• High Performance: Optimized for AC-3e/AC-3 applications with a rated current of 17 A and a power rating of 7.5 kW at 400 V.
• Reliable DC Operation: Equipped with a low-power 110 V DC coil for dependable switching in DC control systems.
• Integrated Auxiliary Contacts: The built-in 2 NO + 2 NC contacts provide ample flexibility for interlocking, signaling, and control functions.
• Time-Saving Installation: Spring-loaded terminals ensure fast, simple, and reliable wiring without the need for tools, resisting loosening from vibration.
• Compact Design: The space-efficient S0 size is perfect for integration into control panels where space is a premium.
• Enhanced Flexibility: The removable auxiliary switch allows for easy customization and serviceability.
• Durability and Longevity: Built with high-quality materials to withstand demanding industrial environments, ensuring a long operational life.

Function

The Siemens 3RT2025-2BF44 power contactor serves as the core component for switching and controlling electric motors and resistive loads. When the 110 V DC control voltage is applied to the coil, it generates a magnetic field that closes the main contacts, allowing power to flow to the connected load.

The integrated auxiliary contacts switch simultaneously, providing feedback on the contactor’s status or activating other control circuit components. The spring-loaded terminal technology maintains a constant, high-pressure connection on the wire, making it a maintenance-free solution for critical applications.