Siemens 3RT2025-2BW40 SIRIUS Power Contactor, 17A, 7.5 kW, 48V DC Coil, Spring-Loaded Terminal Original Brand New

Overview 

The Siemens 3RT2025-2BW40 is a high-performance SIRIUS 3RT2 series power contactor designed for reliable switching of motors and other electrical loads. This 3-pole contactor is rated for AC-3e/AC-3 operation at up to 17 A and 7.5 kW at 400 V, making it ideal for a wide range of industrial applications.

It features a 48 V DC coil for efficient and secure control, and includes 1 NO (normally open) and 1 NC (normally closed) auxiliary contacts for enhanced functionality and integration into control circuits. The innovative spring-loaded terminals ensure fast, secure, and vibration-resistant wiring, reducing installation time and maintenance needs. With a compact Size S0 design, it is perfect for space-constrained enclosures.

Key Features & Benefit

• High-Efficiency Motor Control: Rated for 17 A and 7.5 kW at 400 V (AC-3e/AC-3), providing robust performance for various motor and load switching tasks.
• Reliable DC Coil: The 48 V DC coil ensures stable and energy-efficient operation, compatible with standard control voltage systems.
• Integrated Auxiliary Contacts: The built-in 1 NO + 1 NC auxiliary contacts offer flexibility for interlocking, signaling, and integrating into complex control schemes without needing external components.
• Innovative Spring-Loaded Terminals: This technology provides a fast, tool-free, and maintenance-free connection. The constant clamping force ensures a gas-tight and vibration-resistant connection, enhancing operational reliability.
• Space-Saving Design: The compact Size S0 form factor allows for high-density installation in control cabinets, optimizing panel space.
• Durability & Longevity: As part of the Siemens SIRIUS family, this contactor is engineered for a long service life and high switching durability, reducing total cost of ownership.
• Global Standards Compliance: Adheres to international standards such as IEC and UL, ensuring suitability for global markets and applications.

Function

The Siemens 3RT2025-2BW40 functions as an electromagnetically operated switch. When a 48 V DC control signal is applied to the coil, it creates a magnetic field that pulls the armature, closing the main power contacts. This allows the flow of high-current power to the connected load (e.g., an electric motor).

Simultaneously, the auxiliary contacts change state—the NO contact closes and the NC contact opens—to provide feedback or control signals to other parts of the system. Releasing the control signal de-energizes the coil, causing the contacts to return to their original position, thereby disconnecting the power to the load.

Application

• Motor starting and control in industrial machinery.
• HVAC systems.
• Pumping stations.
• Conveyor systems.
• Lighting control systems.
• Switching resistive and inductive loads.

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