Siemens 3RT2025-2KB40 SIRIUS 3RT2 Power Contactor 24 V DC Coil & Spring-Loaded Terminals, Size S0 Original Brand New

Overview

The Siemens 3RT2025-2KB40 is a high-performance SIRIUS 3RT2 series power contactor designed for reliable switching of motors and other electrical loads up to 7.5 kW. This 3-pole contactor is rated for 17 A (AC-3e/AC-3) and operates with a wide-range 24 V DC control voltage, making it ideal for use with PLC outputs. Its integrated varistor protects against voltage spikes, while the convenient spring-loaded terminals ensure fast, secure, and vibration-proof wiring.

Key Benefit

• Optimized for Automation: A 24 V DC control voltage with a wide tolerance range (0.7-1.25* Uc) and suitability for PLC outputs ensures seamless integration into modern control systems.
• Space-Saving Design: The compact S0 frame size minimizes panel space requirements, allowing for higher component density in control cabinets.
• Reliable and Safe Operation: An integrated varistor protects the coil from overvoltage, extending the contactor’s lifespan and ensuring stable performance.
• Fast and Secure Wiring: Innovative spring-loaded terminals reduce wiring time and maintenance, providing a reliable connection even in high-vibration environments.
• Versatile Application: Capable of handling loads up to 7.5 kW at 400 V, this contactor is suitable for a wide range of motor and general electrical switching applications.

Technical Specification

• Product Type: Power Contactor
• Series: SIRIUS 3RT2
• Product Number: 3RT2025-2KB40
• Number of Poles: 3-pole
• Current Rating (AC-3e/AC-3): 17 A
• Power Rating: 7.5 kW @ 400 V
• Control Voltage: 24 V DC (0.7-1.25* Uc)
• Auxiliary Contacts: 1 NO + 1 NC
• Terminals: Spring-loaded terminals
• Frame Size: S0
• Integrated Features: Plugged-in varistor
• Special Note: No auxiliary switch block can be added. Suitable for PLC outputs.

Function

The Siemens 3RT2025-2KB40 power contactor is an electromechanical switch used to control a high-power electrical circuit by means of a low-power control signal. When the 24 V DC control signal is applied to the coil, it generates a magnetic field that closes the main contacts, allowing power to flow to the connected load. The built-in auxiliary contacts provide status feedback (1 NO and 1 NC), which is crucial for interlocking and signaling within a control circuit. The spring-loaded terminals offer a tool-free, gas-tight, and secure connection, making it an efficient choice for industrial automation and control applications.

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