Siemens 3RT2024-2FB40 SIRIUS 3RT2 Power Contactor, 12A, 5.5kW, 24V DC Coil, Spring Terminal, Size S0 Original Brand New

Overview: Siemens 3RT2024-2FB40 SIRIUS 3RT2 Power Contactor

The Siemens 3RT2024-2FB40 is a high-performance, 3-pole Power Contactor from the renowned SIRIUS 3RT2 family. Engineered for switching motors and other electrical loads, this reliable device is optimized for performance up to 5.5 kW at 400 V (AC-3e/AC-3) and a rated operational current of 12 A.

Featuring a 24 V DC coil with an integrated, plugged-in diode combination for surge suppression, it ensures smooth and safe operation in DC control systems. The compact Size S0 design saves valuable panel space, while the innovative spring-loaded terminals significantly reduce wiring time and provide a vibration-proof, maintenance-free connection.

Benefit

1. Fast & Reliable Wiring: The advanced spring-loaded terminal technology allows for quick, tool-less wiring of ferrules, ensuring a highly reliable, gas-tight connection that is resistant to vibrations, drastically reducing maintenance time.
2. Space-Saving Design: As a Size S0 Contactor, the compact dimensions of the SIRIUS 3RT2 series enable high-density installation in control cabinets.
3. Enhanced Protection: The integrated diode combination protects the 24 V DC control system from voltage peaks (inductive surges) generated by the coil when it is switched off.
4. Modular Flexibility (SIRIUS System): Fully compatible with the standardized Siemens SIRIUS modular system, allowing easy combination with overload relays (3RU2), circuit breakers, and auxiliary switch blocks.
5. Global Compliance: The SIRIUS 3RT2 series is IE3/IE4-ready and approved for worldwide use (IEC, UL/CSA), making it suitable for global applications.

Function

The Siemens 3RT2024-2FB40 functions as an electromechanical switching device primarily used for switching 3-phase AC motors and other resistive loads. When the 24 V DC control voltage is applied to the coil, the main contacts close, connecting the load (e.g., a motor) to the power supply. When the control voltage is removed, the contacts open. The built-in auxiliary contacts (1 NO + 1 NC) provide status feedback to the control system or are used for interlocking purposes.

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