Siemens 3RT2045-3AF04 Power Contactor 80A, 37kW, 110V AC, S3 Original Brand New

Overview

The Siemens 3RT2045-3AF04 is a high-performance SIRIUS 3RT20 power contactor, designed for reliable switching of motors and other electrical loads. This robust 3-pole device is rated for an operational current of 80 A (AC-3e/AC-3) and a power rating of 37 kW at $400\text{ V}$. Part of the modular SIRIUS system, it offers a compact, climate-resistant solution for industrial control applications. It features a $110\text{ V AC}$ coil (operating at $50\text{ Hz}$), a set of integrated $2\text{ NO}+2\text{ NC}$ auxiliary contacts, and a practical combination of main circuit screw terminals and control/auxiliary circuit spring-loaded terminals, ensuring flexible and secure wiring.

Benefit

• Reliable Motor Switching: Rated for $80\text{ A}$ (AC-3e/AC-3) and $37\text{ kW}$ at $400\text{ V}$, making it suitable for demanding motor control applications.
• Space & Cost Efficiency: Compact Size S3 design from the SIRIUS modular system optimizes panel space and simplifies component selection.
• Flexible and Secure Wiring: Screw terminals for robust connection of the main power circuit, combined with spring-loaded terminals for fast, vibration-proof, and maintenance-free connection of the control and auxiliary circuits.
• Enhanced Control & Monitoring: Built-in and removable $2\text{ NO}+2\text{ NC}$ auxiliary contacts allow for extensive control logic and status feedback.
• Global Standard Compliance: SIRIUS 3RT contactors are climate-resistant and approved for worldwide use (e.g., IEC, UL/CSA), ensuring broad application suitability.
• Easy Integration: Seamlessly integrates with other components in the Siemens SIRIUS range, such as overloads and motor feeders.

Application

The Siemens 3RT2045-3AF04 is ideal for switching 3-phase AC loads, specifically in:

• Motor Control: Starting, stopping, and reversing standard and high-efficiency (IE3/IE4) motors.
• Heating and Lighting: Switching resistive or slightly inductive loads.
• Industrial Machinery: Used in pumps, fans, compressors, conveyors, and production lines.
• Control Panels: As a core switching element in custom industrial control and distribution boards.

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