Siemens 3RT2028-2AH00 Contactor, S0, 38A, 48V AC, Spring-Loaded Original Brand New

Overview: Siemens SIRIUS 3RT2028-2AH00 Power Contactor

The Siemens 3RT2028-2AH00 is a high-performance, 3-pole power contactor from the globally renowned SIRIUS 3RT20 series. Engineered for the reliable and safe switching of motors and resistive loads in industrial automation, this specific model features a rated operational current of 38 A for AC-3e/AC-3 applications, supporting motor power up to 18.5 kW at 400 V.

Designed for modern control panels, the contactor utilizes a low-voltage 48 V AC, 50 Hz control coil for actuation. Its main and auxiliary circuits are equipped with state-of-the-art spring-loaded terminals, ensuring fast, vibration-proof, and maintenance-free wiring connections. The compact Size S0 design minimizes cabinet space requirements while providing robust performance.

Benefit

1. Space-Saving Design (Size S0): Compact footprint allows for higher component density and optimized cabinet layouts.
2. Fast & Reliable Wiring: Spring-loaded terminals (also known as spring-type or push-in terminals) drastically reduce wiring time, resist vibration, and eliminate the need for re-tightening, minimizing maintenance.
3. High Switching Capacity: Suitable for demanding motor applications with a high breaking capacity of $38A$ and $18.5kW$ at $400V$ (AC-3e/AC-3).
4. Integrated Auxiliary Contacts: Includes 1 NO and 1 NC contacts as standard, simplifying control circuitry for interlocking and signaling without external add-on blocks.
5. Part of the SIRIUS Modular System: Seamless compatibility and easy integration with other Siemens SIRIUS components like circuit breakers and overload relays (e.g., thermal overload relay 3RU2).
6. Global Compliance: Meets IEC, UL/CSA standards and is suitable for IE3/IE4 ready applications.

Function / Application

The Siemens 3RT2028-2AH00 Power Contactor is the essential control component for switching electrical loads in various industrial settings. It is primarily used for:

• Direct-on-line (DOL) Motor Starting
• Controlling 3-Phase Motors up to $18.5kW$
• Switching of Resistive Loads (Heating, Lighting)
• Forming Reversing Contactors or Star-Delta Starters (in combination with other components)
• Use in Industrial Machinery, Pumps, Compressors, and Conveyor Systems.

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