Siemens 3RT2038-1NF30 SIRIUS Power Contactor, 80A, 37kW, 83-155V AC/DC, Size S2 Original Brand New

Overview: Siemens SIRIUS 3RT2038-1NF30 Power Contactor

The Siemens 3RT2038-1NF30 is a high-performance 3-pole power contactor from the globally recognized SIRIUS 3RT20 series (Size S2). Engineered for robust motor switching applications (AC-3e/AC-3), this device is essential for controlling electric motors up to 37 kW at 400 V (80 A rated operational current). Its compact design, high contact reliability, and extensive range of accessories make it a cornerstone of modern industrial control systems, particularly in harsh or demanding environments. The integrated wide-range AC/DC control supply voltage (83-155 V) coil with a built-in varistor provides flexibility and surge protection, simplifying inventory and ensuring reliable operation.

Benefit & Features

• Exceptional Performance: Rated for up to 80 A and 37 kW, suitable for heavy-duty industrial motor switching.
• Universal Control: Wide-range AC/DC coil voltage (83-155 V) minimizes inventory complexity and ensures consistent performance across various international supply voltages.
• Integrated Protection: Built-in varistor surge suppression protects the coil from voltage peaks, increasing the contactor’s lifespan and reliability.
• Simplified Wiring: Integrated 1 NO + 1 NC auxiliary contacts eliminate the need for an external auxiliary switch block for standard control tasks.
• Robust & Global Standard: Part of the SIRIUS modular system, complying with international standards (IEC and UL/CSA), making it IE3/IE4-ready and approved for worldwide use.
• Secure Connection: Reliable screw terminal technology for both main and control circuits ensures secure and durable wiring.

Function

The Siemens 3RT2038-1NF30 is primarily used as a motor contactor for switching, starting, and controlling the power supply to 3-phase AC motors and other resistive loads. It functions by using the control coil (83-155V AC/DC) to actuate the main contacts, allowing the high-current operational circuit (up to 80A) to be safely switched on or off. The integrated auxiliary contacts provide a reliable signal (1 NO and 1 NC) for interlocks, status feedback, and control circuit logic.

Application

• Motor Starters (DOL, Reversing)
• Pump Control
• Ventilation and HVAC Systems
• Conveyor Systems
• General Load Switching in Industrial Plants

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