Siemens SIRIUS 3RT2035-1NB30-0CC0 Power Contactor, S2, 41A, 18.5 kW, AC/DC Coil with Varistor & Communication-Capable Original Brand New

Overview

The Siemens 3RT2035-1NB30-0CC0 is a high-performance, 3-pole SIRIUS 3RT2 Power Contactor designed for switching motors up to 18.5 kW at 400V (AC-3e/AC-3). Part of the innovative SIRIUS modular system, this size S2 contactor is rated for a continuous operational current of 41 A. It features an efficient AC/DC wide-range control voltage of 20-33 V, simplifying control circuit design.

For enhanced reliability and lifespan, it includes an integrated varistor for surge suppression. Connectivity is secure and robust with screw terminals, and it is equipped with 1 Normally Open (NO) + 1 Normally Closed (NC) auxiliary contacts. Notably, this model is communication-capable, allowing for easy integration into digital and networked control systems.

Key Features and Technical Specifications

• Product Number: 3RT2035-1NB30-0CC0
• Contactor Type: Power Contactor (Motor Switching)
• Product Series: SIRIUS 3RT2
• Size: S2
• Poles: 3-pole
• Rated Operational Current (AC-3e/AC-3, 400V): 41 A
• Rated Operational Power (AC-3e/AC-3, 400V): 18.5 kW
• Control Voltage (Coil): 20-33 V AC/DC (Wide-range)
• Surge Protection: Integrated varistor
• Auxiliary Contacts: 1 NO + 1 NC
• Main Terminals: Screw terminal
• Special Feature: Communication-capable (ready for digital integration)
• Standards: Meets AC-3e/AC-3 requirements for use with high-efficiency IE3/IE4 motors.

Benefits & Advantages

1. High Reliability & Protection: Integrated varistor ensures coil protection against voltage surges, extending the contactor’s mechanical and electrical service life.
2. Flexible Control: The wide-range AC/DC coil (20-33V) simplifies stock management and provides compatibility with various power supplies.
3. Space and Cost Efficiency: Its compact size (S2) and compliance with modern standards like AC-3e make it ideal for efficient motor control solutions.
4. Digital Future-Proof: Being communication-capable, it is perfectly suited for use in digitized plants (Industry 4.0), allowing for remote diagnostics and centralized control.
5. Easy Installation: Robust screw terminals provide a secure and straightforward connection method.

Function

The Siemens 3RT2035-1NB30-0CC0 is primarily used in industrial applications for reliably switching 3-phase AC motors. Typical applications include:

• Starting and stopping standard and high-efficiency (IE3/IE4) electric motors.
• Control of electrical heating and lighting systems.
• Integration into complex control panels and motor control centers (MCCs).
• Any application requiring a robust, reliable, and communication-ready power switching solution in the $18.5\text{ kW}$ class.

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