Siemens 3RT2026-1FB40-1KS0 SIRIUS Power Contactor, 25A, 11kW, 24V DC, S0, Screw Terminal Original Brand New

Overview

The Siemens 3RT2026-1FB40-1KS0 is a specialized, customer-specific SIRIUS power contactor designed for reliable switching of motors and other resistive loads. It adheres to the latest AC-3e/AC-3 utilization categories, offering a rated operational current of 25 A and a power rating of 11 kW at $400\text{ V}$.

This robust, 3-pole device uses a low-power $24\text{ V DC}$ operating coil and features a pre-installed plugged-in diode combination to suppress coil-generated voltage peaks, protecting sensitive electronics. It comes equipped with $1\text{ NO}+1\text{ NC}$ auxiliary contacts for signaling and control circuit integration, and utilizes screw terminals for secure wiring. The compact Size S0 makes it ideal for space-constrained applications.

Benefits and Advantages

• Reliable Motor Control: Rated for $25\text{ A}$ (AC-3e/AC-3), ensuring secure and long-lasting switching performance for $11\text{ kW}$ motors.
• DC Coil Efficiency: The $24\text{ V DC}$ coil offers reliable operation and is widely compatible with modern PLC and control systems.
• Surge Protection: Integrated diode combination protects control circuits from voltage transients and back-EMF, extending system life.
• Control Flexibility: Built-in $1\text{ NO}+1\text{ NC}$ auxiliary contacts simplify integration into complex control and feedback loops.
• Easy Installation: Robust screw terminals provide a secure, low-resistance connection.
• Compact Design: Size S0 minimizes panel space requirements.

Function and Application

This power contactor functions as an electrically operated switch for industrial automation and control systems. It is primarily used for switching electric motors, heating elements, lighting, and power factor correction capacitors.

Typical Applications Include:

• Control of industrial motors and pumps.
• HVAC and refrigeration systems.
• Machine tools and conveyor systems.
• General power switching in control cabinets.

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