Siemens 3RT2028-1BF44 Power Contactor 38A, 18.5 kW, 3-Pole, 110V DC, Auxiliary Switch Original Brand New

Overview

The Siemens 3RT2028-1BF44 is a high-performance power contactor designed for demanding industrial applications. Engineered for reliability and efficiency, this 3-pole contactor ensures precise control of AC motors up to 18.5 kW at 400 V. Its compact size S0 design, screw terminal connections, and removable auxiliary switch make installation and maintenance simple and convenient.

Key Features

• Rated Current: 38 A

• Motor Control Capacity: 18.5 kW at 400 V (AC-3)

• Poles: 3

• Coil Voltage: 110 V DC

• Auxiliary Contacts: 2 NO + 2 NC for versatile control options

• Terminals: Screw type for secure wiring

• Size: S0 compact design

• Additional Features: Removable auxiliary switch for easy upgrades or maintenance

Benefit

• Reliable Performance: Handles heavy-duty AC motors efficiently, ensuring long-lasting operation.

• Flexible Control: Auxiliary contacts allow customized control circuits for automation setups.

• Easy Installation & Maintenance: Screw terminals and removable auxiliary switch simplify wiring and component replacement.

• Compact Design: Space-saving S0 size fits neatly into existing electrical panels.

Application

• Industrial motor control

• Manufacturing automation systems

• HVAC systems and large machinery

• Electrical distribution panels requiring compact, high-performance contactors

Function

The 3RT2028-1BF44 functions as the primary power switching element in motor control circuits. It is typically controlled by a 110 V DC signal to energize its coil, which in turn closes the three main contacts to supply power to a motor. The integrated 2NO + 2NC auxiliary contacts provide essential feedback and interlocking signals for complex automation and safety circuits. The removable auxiliary switch adds flexibility for maintenance or system changes.

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