Siemens SIRIUS 3RT2028-2AG20 Power Contactor, 38A, 18.5kW, 110V AC Coil, Size S0, Spring-Loaded Terminal Original Brand New

Overview

The Siemens SIRIUS 3RT2028-2AG20 is a high-performance, compact 3-pole power contactor designed for reliable switching of motors and other electrical loads in industrial control systems. As part of the globally approved SIRIUS 3RT2 series, this contactor offers outstanding performance with a space-saving Size S0 design. It is engineered to meet the latest standards (AC-3e/AC-3) and is ideal for integration into motor starter applications, ensuring maximum operational reliability and efficiency.

Benefit

• Fast and Reliable Wiring: The cutting-edge spring-loaded terminals (Cage Clamp) ensure a secure, vibration-proof, and maintenance-free connection, significantly reducing wiring time compared to traditional screw terminals.
• High Performance in Compact Design: The Size S0 format provides powerful switching capability (18.5 kW / 38 A) in a small footprint, saving valuable space in control cabinets.
• Global Standard Compliance: Rated for both AC-3 and the latest energy efficiency standard AC-3e, ensuring compliance and future-proofing your installation.
• Enhanced Functionality: Comes standard with an integrated 1 NO + 1 NC auxiliary switch for immediate signaling and control circuit integration, reducing complexity and the need for external components.
• System Integration: Fully compatible with the modular SIRIUS system, allowing for easy addition of accessories like overload relays, auxiliary switch blocks, and function modules.
• Long Mechanical Service Life: Typical mechanical service life of 10 million operating cycles ensures durability and minimal downtime.

Function

The 3RT2028-2AG20 functions as the primary switching device in a motor starter or control circuit. It is primarily used for switching three-phase AC motors and resistive loads. The contactor receives a 110V AC control signal on its coil, which energizes an electromagnet to open or close the main power contacts.

Application

• Direct-on-line (DOL) Motor Starters
• Reversing Starters (in combination with a second contactor)
• Control of Heaters, Lighting, and Capacitor Banks
• Integration into Industrial Machinery and Automation Systems

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