Siemens SIRIUS 3RT2018-2UB42 Power Contactor 16A, 7.5kW, 24V DC, S00 Size Original Brand New

Overview

The Siemens 3RT2018-2UB42 is a high-performance SIRIUS series power contactor engineered for reliable switching of motors and other industrial loads. As part of the modular 3RT2 family, this compact S00 size contactor offers exceptional functionality and a long service life, making it an ideal choice for a wide range of applications, from simple motor control to complex industrial automation systems. With its integrated varistor and efficient 24V DC coil, it ensures minimal switching surges and reduced energy consumption.

Key Features & Specification

• Product Number: Siemens 3RT2018-2UB42
• Contactor Type: Power Contactor
• Operating Current (AC-3e/AC-3): 16 A
• Motor Power (AC-3): 7.5 kW at 400 V
• Number of Poles: 3-pole
• Coil Voltage: 24 V DC
• Integrated Protection: Varistor for surge suppression
• Auxiliary Contacts: 1 normally closed (NC)
• Terminal Type: Spring-loaded terminals for fast, secure wiring
• Size: S00

Benefit

• Reliable Performance: Built with Siemens’ renowned quality, ensuring long-term operational stability and safety.
• Space-Saving Design: The compact S00 size allows for high-density panel layouts, optimizing cabinet space.
• Reduced Wiring Time: Spring-loaded terminals offer a quick, tool-free wiring solution, significantly reducing installation and maintenance effort.
• Enhanced Coil Protection: The integrated varistor effectively dampens voltage spikes, extending the life of the coil and protecting sensitive control electronics.
• Energy Efficient: The 24V DC coil consumes less power compared to AC coils, contributing to lower operating costs.
• Versatile Application: Suitable for switching various loads, including standard and IE3/IE4 motors.

Function

The Siemens 3RT2018-2UB42 functions as an electrically controlled switch, designed to make or break an electrical circuit. When the 24V DC coil is energized, it closes the main power contacts, allowing current to flow to the connected load (e.g., an electric motor). When the coil is de-energized, the contacts open, interrupting the power.

The 1 NC auxiliary contact provides a signal for control and monitoring circuits, indicating the status of the main contacts. The spring-loaded terminals ensure a vibration-proof and gas-tight connection, crucial for reliable performance in industrial environments.

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