Siemens 3RT2018-1UB41 SIRIUS Power Contactor, 16A, 7.5kW, 24V DC, S00 Original Brand New

Overview: Siemens 3RT2018-1UB41 SIRIUS 3RT20 Power Contactor

The Siemens 3RT2018-1UB41 is a high-performance, 3-pole power contactor from the SIRIUS 3RT20 series, optimized for switching motors up to 7.5 kW at 400 V (AC-3e/AC-3).

This compact Size S00 contactor features a 24 V DC operating coil with a built-in varistor for enhanced surge suppression, offering reliability and protection for your control system. Its robust design is climate-proof and suitable for use in a wide range of industrial applications worldwide. It comes with screw terminals for secure and straightforward wiring of the main and auxiliary circuits.

Benefits & Advantages

• Compact Design (Size S00): Space-saving installation in control panels and cabinets.
• High Reliability: Part of the proven Siemens SIRIUS modular system, ensuring optimal performance and compatibility.
• Enhanced Coil Protection: The integrated varistor protects the DC control circuit against switching overvoltages, extending the life of the coil and associated electronics.
• Global Suitability: Climate-proof and internationally approved (e.g., IEC, UL/CSA), making it ideal for machinery destined for worldwide export.
• Ready for IE3/IE4 Motors: Compliant with modern high-efficiency motor standards.
• Easy Integration: Features one integrated normally open (NO) auxiliary contact for feedback or interlocking circuits.
• Secure Wiring: Robust screw terminals provide a reliable electrical connection.

Function

The 3RT2018-1UB41 serves as an electromagnetic switch (contactor) for the low-voltage industrial control market. Its primary function is the remote switching and control of electric motors and other resistive loads (e.g., heating). By applying the 24 V DC control voltage to the coil, the main contacts close to power the load. The integrated auxiliary contact (1 NO) provides a switching signal for the higher-level control system (PLC) or for interlocking other devices.

Application

• Standard motor switching in industrial machinery
• Control of heating elements
• Lighting control systems
• Integration into complex control panels and motor starters

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