Siemens 3RT2018-1CP04-3MA0 SIRIUS Power Contactor 16A, 7.5kW, 230V AC Original Brand New

Overview: Siemens 3RT2018-1CP04-3MA0 SIRIUS Power Contactor

The Siemens 3RT2018-1CP04-3MA0 is a high-performance, 3-pole power contactor from the trusted SIRIUS 3RT2 family, designed for reliable switching of three-phase motors and other electrical loads up to $7.5\text{ kW}$ at $400\text{ V}$. Featuring a compact Size S00 design, this contactor is engineered for efficiency and space-saving integration in industrial control panels.

It includes a $230\text{ V AC},50/60\text{ Hz}$ coil with a plugged-on varistor for enhanced surge suppression and increased service life of the control circuit. The unit comes equipped with $2\text{ NO}+2\text{ NC}$ captive auxiliary contacts and uses secure screw terminals for main and auxiliary circuits. It is compliant with modern efficiency standards like AC-3e/AC-3.

Benefits & Key Features

• High Performance in Compact Design (S00): Delivers $7.5\text{ kW}$ switching capacity while minimizing panel space requirements.
• Reliable Surge Protection: Integrated plugged-on varistor protects the control coil against voltage peaks, ensuring longer product life and stability.
• Enhanced Control Functionality: Built-in $2\text{ NO}+2\text{ NC}$ auxiliary contacts are captive for reliable signaling and interlocking without the need for additional components.
• Global Standard Compliance: SIRIUS 3RT2 contactors are IE3/IE4 ready and globally certified (e.g., IEC, UL/CSA).
• Secure & Easy Wiring: Robust screw terminals provide a dependable connection for demanding industrial environments.
• AC-3e Compliance: Meets the latest requirements for motor switching efficiency and performance.

Function

The 3RT2018-1CP04-3MA0 serves as an electromechanical switching device used to control an electrical power circuit, most commonly for switching on and off a three-phase motor. When the $230\text{ V AC}$ coil is energized, the three main NO contacts close, allowing power to flow to the motor. Simultaneously, the integrated auxiliary contacts change state, providing feedback or control signals to the higher-level automation system (PLC, relay, etc.).

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