Siemens 3RT2028-1AV00-0JA0 SIRIUS Power Contactor, 3-Pole, 38A, 18.5 kW Original Brand New

Overview

The Siemens 3RT2028-1AV00-0JA0 is a high-performance SIRIUS power contactor designed for reliable switching of motors and other electrical loads. This 3-pole contactor is rated for AC-3e/AC-3 applications, with a current rating of 38 A and a power rating of 18.5 kW at 400 V. Featuring a 400 V AC, 50 Hz coil and a compact S0 size, this robust component is ideal for industrial automation, motor control panels, and a wide range of machinery.

Its built-in 1 NO and 1 NC auxiliary contacts offer enhanced functionality and flexibility for control circuits. The secure screw terminals ensure a strong and reliable connection, while its compliance with high-temperature operation (Tu max. 50 °C) and specific Indian standards (40 A) makes it suitable for demanding environments.

Key Features & Benefit

• High Performance: Optimized for AC-3e/AC-3 applications, handling up to 38 A and 18.5 kW, ensuring efficient and reliable motor switching.
• Integrated Auxiliary Contacts: The 1 normally open (NO) and 1 normally closed (NC) auxiliary contacts simplify wiring for feedback and interlocking circuits, reducing the need for external components.
• Robust & Durable: Built with the SIRIUS quality standard, providing a long mechanical and electrical lifespan for continuous, high-cycle operation.
• Easy & Secure Installation: Screw terminals offer a simple yet secure method for wiring, minimizing installation time and ensuring a reliable connection even in high-vibration environments.
• Compact Design: The S0 size allows for space-saving installation in control cabinets, making it perfect for applications where panel space is at a premium.
• Versatile Application: Suitable for a broad range of industrial applications, including motor starters, switching resistive loads, and general automation.
• Regional Compliance: Specifically rated for India (40 A) and built to withstand a maximum ambient temperature of 50 °C, making it reliable in challenging operating conditions.

Function

The Siemens 3RT2028-1AV00-0JA0 functions as an electromechanical switch. When the 400 V AC, 50 Hz control coil is energized, it creates a magnetic field that pulls the main contacts together. This action closes the main power circuit, allowing current to flow to the connected motor or load. When the coil is de-energized, a spring returns the contacts to their open position, interrupting the power flow. The auxiliary contacts switch simultaneously, providing feedback on the contactor’s state (open or closed) to the control system or for interlocking with other components.

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