Siemens SIRIUS 3RT2023-1BF40 Power Contactor, 9A, 4kW (400V), 3-Pole, 110V DC Coil, Size S0, Screw Terminal, 1 NO + 1 NC Aux Contacts Original Brand New

Overview: High-Performance SIRIUS 3RT2 Power Contactor

The Siemens 3RT2023-1BF40 is a highly efficient and reliable power contactor from the SIRIUS 3RT2 series, designed for switching motors and other resistive loads. As a 3-pole device rated for $9A$ at $400V$ ($4kW$ in AC-3/AC-3e), this contactor provides robust performance in a compact, Size S0 frame. It features a $110VDC$ control voltage for reliable switching and includes integrated $1$ Normally Open ($NO$) and $1$ Normally Closed ($NC$) auxiliary contacts, streamlining installation. The secure screw terminal connections make wiring straightforward and ensure a robust electrical connection.

Part of the flexible SIRIUS modular system, the 3RT2023-1BF40 is an ideal component for building full load feeders and motor starters in industrial automation and control panel applications.

Benefit

• Optimal Motor Switching: Perfectly suited for switching motors up to $4kW$ at $400V$, ensuring reliable start/stop operation (AC-3/AC-3e rating).
• Space-Saving Design: The compact Size S0 allows for higher density mounting in control cabinets and panels.
• Reliable DC Control: $110VDC$ coil voltage provides stable and precise control, often preferred in industrial DC control systems.
• Integrated Flexibility: Built-in $1NO+1NC$ auxiliary contacts simplify control circuit wiring and signal feedback without needing external add-on blocks.
• Robust Connection: Secure screw terminals provide a simple yet reliable and high-contact-pressure connection, minimizing maintenance.
• System Compatibility: Seamless integration with other SIRIUS components (e.g., overload relays, circuit breakers) for complete, factory-tested load feeder solutions.

Function and Application

The 3RT2023-1BF40 Power Contactor functions as an electromechanically operated switch, used primarily to control electric circuits, specifically for motors. It is activated by applying the $110VDC$ voltage to the control coil.

Typical Application

• Direct On-Line (DOL) starting of three-phase squirrel-cage motors.
• Controlling resistive heating loads.
• Switching lighting systems in large industrial facilities.
• Integration into complex control circuits (PLCs, relay logic) where a reliable $110VDC$ signal is used for coil actuation.

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