Siemens 3RT2035-1NF34 SIRIUS Power Contactor, 41A, 18.5kW, 3-Pole, 83-155V AC/DC Coil, Size S2 Original Brand New

Overview: High-Performance SIRIUS 3RT2 Power Contactor

The Siemens 3RT2035-1NF34 is a robust and highly reliable SIRIUS 3RT2 power contactor designed for switching motors and industrial loads up to 41 Amps and 18.5 kW at 400V. As a core component of the modular SIRIUS system, this 3-pole contactor (Size S2) offers a compact design without compromising on performance or functionality. Its wide-range control voltage of 83-155 V AC/DC (with integrated varistor for surge suppression) and convenient screw terminals make it versatile for diverse global applications.

Benefit

• Maximum Flexibility: Features a wide operating voltage range (83-155 V AC/DC) and an integrated varistor, simplifying coil selection and offering enhanced surge protection.
• Space-Saving Design (S2 Size): Delivers high switching capacity (up to 18.5 kW) within a compact footprint.
• High Reliability & Safety: The SIRIUS 3RT2 family is known for excellent contact reliability and compliance with international standards (IEC, UL/CSA), making it suitable for worldwide use.
• Advanced Control Integration: Equipped with an expanded 2 NO + 2 NC auxiliary contact configuration and a removable auxiliary switch for complex control tasks and system diagnostics.
• Efficient Wiring: Utilizes robust screw terminals for secure and industry-standard connection of main and control circuits.
• Future-Proof: IE3/IE4-ready, supporting highly efficient motor systems.

Function

The Siemens 3RT2035-1NF34 power contactor is an electromechanical switching device used to reliably and safely switch the high-current electrical power circuit (main circuit) to an industrial load, typically a motor.

1. Switching Function: When the control coil is energized with a voltage between 83 and 155 V AC/DC, the 3 main contacts close, connecting the 3-pole power circuit to the motor (operating category AC-3e/AC-3).
2. Control Integration: The integrated 2 NO and 2 NC auxiliary contacts provide feedback or control signals to the higher-level automation system (e.g., PLC), indicating the contactor’s on/off status.
3. Surge Suppression: The integrated varistor protects the control coil and the connected control system from voltage spikes, prolonging component life.
4. Modular System: Designed for seamless integration with other SIRIUS modular components (e.g., overload relays, circuit breakers) to build complete, tested load feeders.

Application

Ideal for controlling and switching:

• Three-phase AC motors up to 18.5 kW.
• Pump systems and ventilator drives.
• Heating loads (resistive loads).
• Lighting circuits (in certain configurations).
• Machinery and plant engineering.

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