Siemens SIRIUS 3RT2028-1DB40 Power Contactor Size S0, 38A, 18.5kW, 24V DC Coil Original Brand New

Overview

The Siemens SIRIUS 3RT2028-1DB40 is a high-performance power contactor designed for reliable and efficient switching of motors and resistive loads in industrial applications. This 3-pole contactor is a key component in motor control circuits, offering exceptional durability and a compact design. It features a 24 V DC coil with an integrated varistor for surge protection, ensuring a long service life and stable operation. The screw terminals provide a secure and straightforward connection, making installation and maintenance hassle-free.

Key Benefit

• High Performance: Capable of handling up to 38 A and 18.5 kW at 400 V, suitable for a wide range of motor control applications.
• Enhanced Protection: The integrated varistor protects the coil and the control circuit from voltage spikes, extending the lifespan of the contactor.
• Space-Saving Design: The compact Size S0 form factor allows for installation in tight spaces, optimizing panel layout.
• Versatile Auxiliary Contacts: Equipped with 1 normally open (NO) and 1 normally closed (NC) auxiliary contact for flexible integration into control and signaling circuits.
• Reliable Connections: Robust screw terminals ensure a secure and stable electrical connection, reducing the risk of faults.
• Global Recognition: As part of the Siemens SIRIUS series, this contactor is a trusted component used worldwide in various industrial settings.

Function

The Siemens 3RT2028-1DB40 contactor performs the primary function of making and breaking an electrical circuit under normal operating conditions. It is specifically designed for motor control (AC-3e/AC-3), enabling the reliable start and stop of motors. The 24 V DC coil, when energized, creates a magnetic field that closes the main contacts, allowing power to flow to the motor. The auxiliary contacts can be used for feedback, interlocking, and other control functions within a larger system.

Technical Specification

• Product Number: 3RT2028-1DB40
• Type: Power Contactor
• Operational Current: 38 A (AC-3e/AC-3)
• Operational Power: 18.5 kW @ 400 V
• Number of Poles: 3-pole
• Coil Voltage: 24 V DC
• Auxiliary Contacts: 1 NO + 1 NC
• Connection Type: Screw Terminal
• Size: S0
• Special Features: Plugged-in varistor for surge protection

Application

• Motor control circuits
• HVAC systems
• Pumping and fan systems
• Conveyor systems
• Industrial machinery
• Building automation

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