Siemens SIRIUS 3RT2028-2BB44 Power Contactor 38A, 18.5kW, 24V DC Coil, 2 NO + 2 NC Aux, Spring-Loaded Terminals Original Brand New

Overview

The Siemens SIRIUS 3RT2028-2BB44 is a high-performance power contactor designed for reliable switching of motors and resistive loads. Part of the trusted SIRIUS 3RT2 series, this contactor is engineered for demanding industrial applications. It features a robust 3-pole design, a compact size S0 frame, and a powerful 24V DC coil.

With a current rating of 38 A and a power rating of 18.5 kW at 400 V (AC-3e/AC-3), it is a versatile solution for motor control circuits. The integrated 2 NO + 2 NC auxiliary contacts and innovative spring-loaded terminals enhance its functionality and ease of use, while the removable auxiliary switch provides added flexibility.

Key Benefit

• High Performance: Rated for AC-3e/AC-3, providing reliable and efficient switching for various load types, including motors up to 18.5 kW.
• Space-Saving Design: The compact S0 frame size allows for efficient panel layout and saves valuable space in control cabinets.
• Reliable and Durable: Built with high-quality materials and Siemens’ renowned engineering, ensuring a long service life and minimal maintenance.
• Easy and Fast Installation: Spring-loaded terminals offer a secure, vibration-proof connection without the need for tools, drastically reducing wiring time and labor costs.
• Enhanced Functionality: The integrated 2 NO + 2 NC auxiliary contacts provide flexibility for signaling and control circuits.
• Flexible Configuration: The removable auxiliary switch allows for easy customization and adaptation to specific application needs.
• Energy Efficient: The 24V DC coil is designed for low power consumption, contributing to reduced operating costs.

Technical Function

• Switching Capacity: The 3-pole configuration is ideal for switching three-phase motors and other AC loads.
• Coil Voltage: Operates with a 24V DC control voltage, compatible with standard industrial control systems.
• Terminal Type: Spring-loaded terminals (push-in technology) provide a fast, reliable, and maintenance-free connection.
• Auxiliary Contacts: A built-in block with 2 normally open (NO) and 2 normally closed (NC) contacts for feedback, interlocking, and control circuit functions.
• Size: S0 frame size, adhering to international standards for compact design.
• Standard Compliance: Meets IEC 60947 and other relevant international standards for safety and performance.

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