Siemens 3RT2025-1BB44-3MA0 SIRIUS Power Contactor, 17A, 24V DC, S0 Size, 2NO+2NC Original Brand New

Overview

The Siemens 3RT2025-1BB44-3MA0 is a high-performance SIRIUS 3RT2 series power contactor designed for reliable switching of motors and other electrical loads. This robust 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 suitable for a wide range of industrial applications. The S0 size compact design allows for efficient use of panel space. It features a 24 V DC control voltage, ensuring compatibility with modern control systems, and comes equipped with a fixed auxiliary switch configuration of 2 normally open (NO) and 2 normally closed (NC) contacts for enhanced control flexibility. The screw terminals provide a secure and straightforward connection.

Key Features & Benefit

• High Performance: Rated for 17 A and 7.5 kW at 400 V, providing reliable motor control.
• Integrated Auxiliary Contacts: The fixed 2 NO + 2 NC auxiliary contacts simplify wiring and offer immediate feedback on the contactor’s status, eliminating the need for separate auxiliary blocks.
• Compact S0 Size: Saves valuable space within electrical enclosures and control panels.
• Robust Screw Terminals: Ensures a durable and secure electrical connection, minimizing maintenance.
• Versatile Application: Ideal for switching motors, heaters, lighting, and other inductive loads in various industrial environments.
• DC Coil Control: The 24 V DC coil is compatible with standard PLC outputs and DC control systems, offering energy efficiency and reduced wiring complexity.
• Captive Auxiliary Switch: The auxiliary contacts are integrated and non-removable, providing a tamper-proof and reliable solution.
• No Surge Suppressor Retrofittable: This specific model is designed without the ability to add a separate surge suppressor, which should be considered during installation planning.

Technical Specification

• Product Type: Power Contactor
• Siemens Series: SIRIUS 3RT2
• Product Number: 3RT2025-1BB44-3MA0
• Rated Operational Current (AC-3e/AC-3): 17 A
• Rated Power (AC-3e/AC-3): 7.5 kW @ 400 V
• Number of Poles: 3-pole
• Control Supply Voltage: 24 V DC
• Auxiliary Contacts: 2 NO + 2 NC (Captive)
• Terminal Type: Screw Terminal
• Size: S0
• Mounting: DIN rail or screw mounting
• Surge Suppressor: No retrofittable surge suppressor

Function

The Siemens 3RT2025-1BB44-3MA0 functions as a remote-controlled electrical switch. When the 24 V DC coil is energized, it creates a magnetic field that pulls the main contacts together, allowing power to flow to the connected load. Simultaneously, the integrated auxiliary contacts change state, which can be used to provide status signals to a PLC, interlock with other devices, or control indicator lights. De-energizing the coil releases the contacts, interrupting the power supply.

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