Siemens SIRIUS 3RT2028-1AB00 Power Contactor, Size S0, 38A, 18.5kW, 24V AC Coil, Screw Terminal Original Brand New

Overview

The Siemens SIRIUS 3RT2028-1AB00 is a high-performance 3-pole power contactor from the trusted SIRIUS 3RT2 series, engineered for the control of electric motors and other resistive loads. As part of Siemens’ modular system, this size S0 contactor delivers a compact design, excellent contact reliability, and long service life for industrial control applications. Featuring a robust 3-pole main circuit, an integrated 1 NO + 1 NC auxiliary contact block, and secure screw terminals, the 3RT2028-1AB00 is the ideal choice for reliable motor switching up to 18.5 kW / 400 V.

Benefit & Features

• Optimized Performance: Rated for demanding AC-3e/AC-3 motor switching applications up to 38 Amps and 18.5 kW at 400V.
• Space-Saving Design: Compact Size S0 ensures efficient use of panel space within control cabinets.
• High Reliability: Part of the SIRIUS modular system, offering high contact reliability and prolonged endurance.
• Integrated Auxiliary Contacts: Includes one Normally Open (NO) and one Normally Closed (NC) contact (1 NO + 1 NC) for enhanced control circuit feedback and interlocking, reducing wiring complexity.
• Secure Connection: Reliable screw terminal connection method for the main and auxiliary circuits.
• Global Standard Compliance: Approved for worldwide use (e.g., IEC and UL/CSA), making it suitable for international machinery.
• Climate Resistant: Operates reliably in a wide ambient temperature range (-25 to +60 °C).

Function

The Siemens 3RT2028-1AB00 power contactor functions as an electrically operated switch for a power circuit. Its primary purpose is to safely and reliably switch three-phase AC loads, such as asynchronous electric motors. When the 24 V AC control voltage is applied to the coil, the main contacts close, connecting the motor to the power supply. The integrated auxiliary contacts provide status feedback to the control system or are used for interlocking and control logic.

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