Siemens 3RT2038-3AC20 Power Contactor Size S2, 80A, 3-Pole, 24V AC Control Original Brand New

Overview

The Siemens 3RT2038-3AC20 is a high-performance power contactor designed for reliable and efficient switching of electrical loads. As part of the SIRIUS family, this S2 size contactor is engineered for industrial applications, offering robust performance, high switching capacity, and a compact design. It features a rated operational current of 80 A for AC-3e/AC-3, making it suitable for a wide range of motor and general-purpose switching tasks up to 37 kW at 400 V.

Key Features & Benefit

• High Performance: With an 80 A current rating, it’s capable of handling significant power loads, ensuring reliable operation for medium to heavy-duty applications.
• Energy Efficiency: The AC-3e/AC-3 rating ensures optimal performance for motor switching, contributing to energy savings and operational efficiency.
• Versatile Connectivity: The main circuit utilizes screw terminals for secure and robust connections, while the control and auxiliary circuits feature spring-loaded terminals, enabling quick, easy, and vibration-proof wiring.
• Integrated Auxiliary Contacts: The built-in 1 NO + 1 NC auxiliary contacts provide flexibility for control circuits, signaling, and interlocking, reducing the need for additional components.
• Compact & Space-Saving: As a size S2 contactor, it offers a high power-to-size ratio, allowing for more efficient use of space within control cabinets and electrical panels.
• Global Standard: Designed and manufactured by Siemens, a leader in industrial automation, this product meets international quality and safety standards.

Function

The Siemens 3RT2038-3AC20 functions as an electrically operated switch for a power circuit. When the 24 V AC control voltage is applied to the coil, the magnetic field generated pulls the main contacts closed, allowing power to flow to the connected load (e.g., an electric motor). When the control voltage is removed, the contacts open, interrupting the power flow. The integrated auxiliary contacts switch simultaneously, providing feedback or control signals to other parts of the system.

Technical Specification

• Product Type: Power Contactor
• Siemens Part Number: 3RT2038-3AC20
• Rated Operational Current (Ie): 80 A (AC-3e/AC-3)
• Rated Power: 37 kW at 400 V
• Number of Poles: 3-pole
• Control Supply Voltage: 24 V AC, 50/60 Hz
• Auxiliary Contacts: 1 Normally Open (NO) + 1 Normally Closed (NC)
• Terminal Type (Main Circuit): Screw Terminal
• Terminal Type (Control/Auxiliary): Spring-loaded Terminal
• Size: S2

Application

This power contactor is ideal for a variety of industrial and commercial applications, including:

• Motor control (starting, stopping, and reversing)
• Pump and fan control systems
• Heating, ventilation, and air conditioning (HVAC) systems
• Lighting control
• General-purpose switching of resistive and inductive loads

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