Siemens SIRIUS 3RT2018-1FB41 Power Contactor 3-Pole, 16A, 7.5 kW, 24V DC Coil, Diode, Size S00, Screw Terminal Original Brand New

Overview

The Siemens SIRIUS 3RT2018-1FB41 is a high-performance 3-pole power contactor specifically designed for AC-3e/AC-3 switching of motors up to 7.5 kW at 400 V. As part of the globally established SIRIUS 3RT20 series, this compact Size S00 contactor features a 24 V DC control voltage with an integrated diode for coil suppression, ensuring reliable and safe operation.

It is equipped with robust screw terminals for secure wiring of the main circuit and control circuit. Its small size, combined with high operational reliability and the inclusion of one Normally Open (1 NO) auxiliary contact, makes the 3RT2018-1FB41 an essential component for motor control and industrial automation applications.

Key Product Specification

• Product Brand: Siemens SIRIUS
• Product Type: Power Contactor (Motor Switching)
• Product Designation: 3RT20
• Article Number: 3RT2018-1FB41
• Number of Poles (Main Circuit): 3-pole
• Rated Operational Current (AC-3/AC-3e, 400V): 16 A
• Rated Operational Power (AC-3/AC-3e, 400V): 7.5 kW
• Control Supply Voltage (Coil): 24 V DC (with integrated diode)
• Contactor Size: S00
• Auxiliary Contacts: 1 Normally Open (1 NO)
• Connection Type: Screw Terminal
• Standards/Compliance: IEC, UL/CSA, IE3/IE4 ready

Benefits & Features

1. Compact Design (Size S00): Space-saving dimensions allow for high packing density in control cabinets and panel boards.
2. High Reliability: Part of the SIRIUS modular system, providing guaranteed performance and high contact reliability.
3. DC Coil with Integrated Protection: The 24V DC coil includes a permanently integrated suppressor diode to protect the control electronics from switching voltage surges, reducing installation time and complexity.
4. Ready for High Efficiency: IE3/IE4 ready—optimally suited for the latest generation of high-efficiency motors.
5. Simplified Wiring: Comes standard with a built-in 1 NO auxiliary contact and features easy-to-use screw terminals for quick and reliable electrical connections.
6. Global Applicability: Worldwide approvals (IEC, UL/CSA, etc.) ensure suitability for international projects and machinery.
7. Motor Switching Excellence: Rated for demanding AC-3e/AC-3 applications, providing robust performance for switching 3-phase asynchronous motors.

Function / Application

The Siemens 3RT2018-1FB41 power contactor is primarily used in low-voltage switchgear for switching motors, heating circuits, and lighting loads. It acts as an electrically controlled switch, reliably connecting or disconnecting the load circuit (main circuit) based on the signal from the control circuit (24V DC coil). Typical applications include:

• Controlling pumps, fans, and conveyor systems.
• Interfacing between control systems (like PLCs) and motor loads.
• Use in motor starter combinations alongside SIRIUS 3RV2 motor starter protectors.

For more information on the SIRIUS line or to view our full range of industrial control products, visit turll today!