Siemens 3RT2028-1FB44-3MA0 Power Contactor 3-Pole, 38A, 18.5 kW / 400V, 24V DC Original Brand New

Overview

The Siemens 3RT2028-1FB44-3MA0 is a reliable, durable, and efficient power contactor designed for heavy-duty industrial use. Engineered to handle AC-3e/AC-3 loads up to 38 A and 18.5 kW / 400 V, it ensures optimal performance in motor control, switching, and automation systems. With a 3-pole design and integrated diode combination, it reduces switching transients and enhances system longevity.

Key Benefits

• High Reliability: Engineered for demanding industrial environments with long operational life.

• Efficient Switching: AC-3e/AC-3 rated, capable of handling motors up to 18.5 kW / 400 V.

• Enhanced Safety: Includes a plugged-in diode combination to prevent voltage spikes.

• Flexible Installation: Screw terminals and size S0 design for easy mounting and integration.

• Versatile Control: Auxiliary contacts (2 NO + 2 NC) allow seamless integration into control circuits.

Features

• Type: Power Contactor

• Poles: 3-pole

• Current Rating: 38 A

• Voltage Rating: 18.5 kW / 400 V

• Coil Voltage: 24 V DC

• Auxiliary Contacts: 2 NO + 2 NC

• Terminal Type: Screw terminal

• Size: S0

• Special Features: Plugged-in diode combination, captive auxiliary switch

• Application: Motor control, industrial automation, switching of AC loads

Function

1. Motor Switching: Primarily functions as a reliable switching device for 3-phase AC motors (AC-3/AC-3e use category).
2. Load Control: Suitable for switching various resistive and inductive loads in industrial automation.
3. Signal Integration: The 2 NO and 2 NC auxiliary contacts provide electrical isolation and feedback signals to the PLC or control circuitry, indicating the contactor’s status.
4. Surge Suppression: The integrated diode assembly dampens voltage peaks on the DC coil, preventing interference and damage.

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