Siemens 3RT2028-1AF00 Power Contactor 38A, 18.5kW (400V), 110V AC Coil, S0 Size Original Brand New

Overview: Reliable and Efficient Power Switching

The Siemens 3RT2028-1AF00 is a high-performance power contactor designed for the reliable switching of motors and other industrial loads. As part of the SIRIUS family, this contactor is engineered for exceptional durability and efficiency in a wide range of applications. With a rated operational current of 38 A for AC-3e/AC-3 and a power rating of 18.5 kW at 400 V, it provides robust performance for demanding industrial environments. The compact S0 size saves valuable panel space, while the included 1 NO + 1 NC auxiliary contacts offer enhanced functionality for control and signaling circuits.

Key Features & Benefit

• High Performance: Rated for AC-3e/AC-3 at 38 A and 18.5 kW, capable of handling significant motor loads.
• Space-Saving Design: The compact size S0 form factor is ideal for panel builders and machine builders looking to optimize cabinet space.
• Integrated Auxiliary Contacts: Features 1 Normally Open (NO) and 1 Normally Closed (NC) auxiliary contact, providing flexibility for interlocking, signaling, and control functions.
• Versatile Coil Voltage: Operates on a standard 110 V AC, 50 Hz control voltage, compatible with common industrial control systems.
• Secure Connection: Equipped with reliable screw terminals for easy and secure wiring, ensuring a stable connection even in high-vibration applications.
• Durable and Long-Lasting: Built with Siemens’ renowned engineering, ensuring a long mechanical and electrical service life, reducing maintenance costs.
• Easy Integration: Part of the modular SIRIUS system, allowing for seamless integration with other Siemens components like overload relays and circuit breakers.

Function

The Siemens 3RT2028-1AF00 functions as an electromagnetically operated switching device. When the 110 V AC coil is energized, it creates a magnetic field that pulls the main contacts together, allowing power to flow to the connected load (e.g., an electric motor). When the coil is de-energized, springs force the contacts to open, interrupting the power. The auxiliary contacts switch simultaneously with the main contacts, providing a feedback signal or enabling interlocking logic in the control circuit.

Technical Specification

• Product Designation: Power Contactor
• Part Number: 3RT2028-1AF00
• Manufacturer: Siemens
• Series: SIRIUS 3RT
• Operational Current: 38 A (AC-3e/AC-3)
• Rated Power: 18.5 kW at 400 V
• Number of Poles: 3-pole
• Coil Voltage: 110 V AC, 50 Hz
• Auxiliary Contacts: 1 NO (Normally Open) + 1 NC (Normally Closed)
• Terminal Type: Screw Terminal
• Size: S0

Application

This contactor is ideal for a wide range of industrial applications, including:

• Switching of electric motors
• Control of heating systems
• Switching of lighting circuits
• Automation and machine control systems
• Pump and fan control

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