Siemens SIRIUS 3RT7035-1AH20 Contactor 40A, 18.5kW, 48V AC, 3-Pole, Size S2 Original Brand New

Overview

The Siemens 3RT7035-1AH20 is a high-performance, 3-pole SIRIUS contactor designed for reliable switching of AC motors and other industrial loads up to 40 Amps or 18.5 kW at 400V. As part of the Siemens SIRIUS modular system, this contactor is engineered for seamless integration into a wide range of control panels and automation systems. Its robust design, compact form factor (Size S2), and convenient screw terminals make it an ideal choice for demanding industrial applications.

Technical Specification

• Product Type: Contactor
• Manufacturer: Siemens
• Part Number: 3RT7035-1AH20
• Series: SIRIUS 3RT
• Standard: AC-3
• Current Rating: 40 A
• Power Rating: 18.5 kW at 400 V
• Number of Poles: 3-pole
• Operating Voltage: 400 V
• Control Voltage (Uc): 48 V AC, 50/60 Hz
• Size: S2
• Connection Type: Screw terminals
• Auxiliary Contacts: Optional (can be added)
• Mounting: DIN rail or screw mounting
• Standards Compliance: IEC, EN

Key Benefits & Features:

• High Performance: Capable of handling significant current and power loads, ensuring reliable operation for medium-duty motor and industrial applications.
• Versatile Application: Specifically designed for AC-3 duty, making it perfectly suited for controlling asynchronous motors, heating systems, and other resistive loads.
• Robust & Durable: Built with high-quality materials to withstand the rigors of industrial environments, offering a long operational life and reduced maintenance needs.
• Compact Design (Size S2): The space-saving S2 form factor allows for higher density installations in control cabinets, helping to optimize panel layout and size.
• Easy Installation: Features straightforward screw terminals for secure and reliable wiring. It is compatible with standard DIN rail mounting, simplifying panel assembly.
• Modular System: Part of the comprehensive Siemens SIRIUS family, which allows for easy expansion with a wide range of accessories, including auxiliary contact blocks, surge suppressors, and timing relays.
• Energy Efficient: Optimized magnetic coil and low power consumption help reduce operational costs and heat generation within the control panel.

Function

The Siemens 3RT7035-1AH20 contactor acts as an electrically controlled switch used for switching a power circuit. When a 48V AC signal is applied to its control coil, it energizes and closes the main contacts, allowing the flow of electrical current to a connected load, such as an electric motor. When the control signal is removed, the contacts open, de-energizing the load. This functionality allows for remote control and automation of machinery and systems.

Application

• Controlling AC motors in manufacturing plants.
• Automating heating, ventilation, and air conditioning (HVAC) systems.
• Switching lighting circuits in commercial and industrial buildings.
• Integration into motor starters, distribution boards, and control panels.
• General industrial control of various loads.

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