Siemens 3RT2024-1BB44-3MA0 Power Contactor, 12A, 5.5kW, 24V DC, 2NO+2NC Original Brand New

Overview: Siemens SIRIUS 3RT2 Power Contactor

The Siemens 3RT2024-1BB44-3MA0 is a high-performance, 3-pole power contactor from the trusted SIRIUS 3RT2 series, engineered for switching motors and general industrial loads. This specific model is a Size S0 device, known for its compact design and high contact reliability, making it an essential component in modern control cabinet construction and industrial automation systems. It features a reliable 24 V DC coil and integrated auxiliary contacts, suitable for demanding motor control applications, including those requiring captive auxiliary switches for enhanced safety or specific control schemes (e.g., SUVA applications).

Function

The 3RT2024-1BB44-3MA0 contactor functions as an electrically operated switch for main power circuits. When the 24 V DC control voltage is applied to the coil, it closes the three main power contacts to supply electricity to the connected load, typically a three-phase motor. The captive 2 NO + 2 NC auxiliary contacts provide essential feedback and interlocking signals to the control system, confirming the contactor’s state (open or closed) and allowing for complex control logic and safety interlocking.

Benefit

• Reliable Motor Switching: Rated for AC-3e/AC-3 applications up to 5.5 kW/400 V, making it IE3/IE4 motor-ready.
• Space-Saving Design: Part of the modular SIRIUS system, offering a compact footprint (Size S0) for efficient cabinet construction.
• Integrated Control Logic: Comes with captive 2 NO and 2 NC auxiliary contacts built-in, simplifying wiring and design.
• Versatile Connectivity: Equipped with robust screw terminals for secure, reliable connection of both main and auxiliary circuits.
• Global Compliance: Climate-resistant and approved for worldwide use (e.g., IEC, UL/CSA).

Application

Ideal for controlling and switching:

• Three-phase AC motors (up to 5.5 kW at 400V)
• Heating elements
• Lighting circuits
• General load feeders in industrial and commercial environments

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