Siemens SIRIUS 3RT2018-1UB42 Power Contactor, 16A, 7.5kW, 24V DC Original Brand New

Overview: Compact & Reliable Motor Switching

The Siemens 3RT2018-1UB42 Power Contactor from the innovative SIRIUS 3RT2 range is a high-performance, compact, 3-pole switching device optimized for motor and general-purpose AC-3e/AC-3 applications. Designed for industrial control panels and motor starters, this reliable S00 Contactor offers a robust and space-saving solution for switching loads up to 7.5 kW at 400 V with a rated current of 16 A.

It features a 24 V DC control voltage coil with an integrated varistor for enhanced surge suppression, providing superior protection and reliability for your control system. The built-in 1 NC auxiliary contact simplifies wiring and expands application possibilities. Connection is secure and straightforward using dependable screw terminals.

Benefit

• Space-Saving Design (Size S00): Extremely compact dimensions for efficient use of panel space.
• High Reliability: Part of the proven Siemens SIRIUS modular system, ensuring high contact reliability and long service life.
• System Protection: Integrated varistor directly in the coil offers reliable surge voltage damping, protecting the control circuit and prolonging coil life without the need for external components.
• Global Compliance: Tested and approved for worldwide use (IEC, UL/CSA, etc.).
• Simplified Wiring: Includes a built-in auxiliary contact (1 NC) and secure screw terminal connections for fast, robust installation.
• Future-Ready: IE3/IE4 motor compatible for energy-efficient drives.

Functions & Typical Applications

The 3RT2018-1UB42 Contactor is primarily used for:

1. Switching Electric Motors: Ideal for starting, stopping, and controlling 3-phase motors up to 7.5 kW.
2. General Load Switching: Suitable for switching resistive, mixed, and non-inductive loads (AC-1).
3. Automation & Control Systems: Used in conjunction with overload relays (e.g., SIRIUS 3RV2 motor starter protectors) to form complete, compact motor feeders.
4. Integration into Machinery: Essential component in pumps, fans, conveyors, and machine tools requiring safe and reliable power switching.

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