Siemens 3RT2045-1AC00 Power Contactor, 80A, 37kW, 32V AC, Size S3 Original Brand New

Overview

The Siemens 3RT2045-1AC00 is a high-performance, 3-pole power contactor from the SIRIUS 3RT2 series, expertly engineered for switching motors and other resistive loads in industrial control systems.

This robust Size S3 contactor is rated for 80 A (AC-3e/AC-3) and 37 kW at $400\text{ V}$. It features a $32\text{ V AC}$, $50\text{ Hz}$ control voltage and comes with an integrated auxiliary contact block of 1 Normally Open (NO) and 1 Normally Closed (NC) contact. The reliable screw terminal connection system ensures secure and easy wiring.

Benefit

1. High Reliability and Longevity: Part of the trusted Siemens SIRIUS modular system, designed for a long mechanical and electrical service life, ensuring maximum uptime.
2. Space and Cost Efficiency (SIRIUS System): The compact Size S3 design and optimal coordination within the SIRIUS system (with thermal overload relays, circuit breakers, etc.) simplify panel building and reduce wiring effort.
3. Worldwide Applicability: Approved for global use, compliant with standards like IEC and UL/CSA, making it suitable for international projects.
4. Simplified Wiring: Equipped with robust screw terminals for the main and auxiliary circuits, facilitating reliable, secure, and straightforward installation.
5. Motor Efficiency Ready: The AC-3e/AC-3 rating and IE3/IE4 readiness support modern, energy-efficient motor applications.

Function & Application

The 3RT2045-1AC00 Contactor is primarily used in industrial automation and control panels as a dependable switching device.

• Function: It is an electromechanical switch designed to handle high currents, typically used to remotely control the start, stop, and reversing of three-phase electric motors. The integrated $1\text{ NO}+1\text{ NC}$ auxiliary contacts allow for feedback, interlocking, and control circuit functions.
• Typical Applications:
  • Motor control for pumps, compressors, fans, and conveyer systems.
  • Switching resistive loads (e.g., heating elements).
  • Integration into complex load feeders and motor starters.
  • Use in various machinery and plant engineering applications.

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