Siemens 3RT2028-1BF40-0JA0 Power Contactor 38A, 18.5kW, 110V DC, Size S0 Original Brand New

Overview

The Siemens 3RT2028-1BF40-0JA0 is a high-performance power contactor from the trusted SIRIUS line, engineered for demanding industrial applications. This robust 3-pole contactor is designed to switch and control electric motors with an operating current of up to 38 A for AC-3 and AC-3e applications, and a maximum power output of 18.5 kW at 400 V. Its compact Size S0 design, combined with a reliable 110 V DC control voltage, makes it an ideal solution for a wide range of machinery and control panels.

Key Features & Benefit

• High Performance: Rated for 38 A (AC-3e/AC-3) and 18.5 kW at 400 V, it efficiently handles the start-up and operation of motors.
• Versatile Control: Operates with a 110 V DC control voltage, ensuring compatibility with many industrial control systems.
• Integrated Auxiliary Contacts: Features 1 NO + 1 NC auxiliary contacts, providing immediate feedback on the contactor’s status for enhanced safety and control logic.
• Reliable Screw Terminals: The screw terminal connection method ensures a secure and durable electrical connection, simplifying installation and maintenance.
• Compact Size: The Size S0 frame allows for space-saving installation in tight control cabinets without compromising on power.
• Durable Construction: Built for reliability and a long service life, even in environments with ambient temperatures up to 50 °C.
• Indian Market Compliance: Rated for 40 A in India, catering specifically to regional electrical standards.

Function

The Siemens 3RT2028-1BF40-0JA0 functions as a remote-controlled switching device. When the 110 V DC control voltage is applied to the coil, it closes the main power contacts, allowing current to flow to the connected load (typically an electric motor). When the control voltage is removed, the contactor opens, interrupting the power supply. The integrated auxiliary contacts mirror the state of the main contacts, providing a signal that can be used for interlocking, status indication, or other control circuit functions.

Application

This power contactor is perfect for use in:

• Motor control circuits
• HVAC systems
• Pump controls
• Conveyor systems
• General industrial machinery
• Building automation

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