Siemens 3RT2018-1BB41-0CC0 Power Contactor, 16A, 24V DC, S00 Original Brand New

Overview

The Siemens SIRIUS 3RT2018-1BB41-0CC0 Power Contactor is a high-performance, compact, 3-pole switching device from the trusted SIRIUS 3RT2 series, sized S00. Designed for reliable switching of motors and other high-power loads up to 7.5 kW / 400 V (AC-3e/AC-3). This specific model features a 24 V DC operating coil, screw terminals for secure wiring, and includes a built-in 1 NO (Normally Open) auxiliary contact. A key feature is its communication-capable design, allowing easy integration into modern industrial control and automation systems.

Key Features & Specification

• Part Number: 3RT2018-1BB41-0CC0
• Manufacturer: Siemens
• Series: SIRIUS 3RT20
• Contactor Size: S00
• Poles: 3-pole main circuit
• Rated Operating Current (AC-3e/AC-3): 16 A
• Rated Power (AC-3e/AC-3): 7.5 kW at 400 V
• Control Supply Voltage: 24 V DC
• Auxiliary Contacts: 1 NO (Integrated)
• Terminal Type: Screw terminals
• Feature: Communication-capable (via optional function module)
• Mechanical Life: Up to 30,000,000 switching cycles (typical)

Benefit

1. High Reliability: Part of the proven Siemens SIRIUS family, ensuring a long mechanical and electrical service life for demanding industrial environments.
2. Space-Saving Design: The compact Size S00 form factor allows for high-density installation in control cabinets and panels.
3. Modern System Integration: Communication-capable functionality future-proofs your system by enabling diagnostic and control integration into network infrastructures like PROFINET via an optional communication module.
4. Versatile Application: Ideal for motor control, lighting systems, heating applications, and general power switching across various industrial and commercial sectors.
5. Easy Installation: Features robust screw terminals and is mountable on a 35mm standard DIN rail, simplifying installation and maintenance.

Function 

The 3RT2018-1BB41-0CC0 Power Contactor serves as a remotely operated switch for high current main circuits. When the 24V DC control voltage is applied to the coil, the main contacts close, connecting the load (e.g., an electric motor) to the power supply. The integrated 1 NO auxiliary contact can be used for signaling, interlocking, or control logic within the automation system. Its design supports various AC operating categories, including the new AC-3e standard (high-efficiency switching of squirrel-cage motors).

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