Siemens 3RT2045-1AF00 Power Contactor, 80A, 37kW, 110V AC Coil, Size S3 Original Brand New

Overview

The Siemens 3RT2045-1AF00 is a high-performance 3-pole power contactor from the SIRIUS 3RT2 series, designed for switching motors and other resistive loads in industrial automation. This robust and compact device handles significant loads, rated for 80 A (AC-3e/AC-3) and a maximum operational power of 37 kW at 400 V. It features a reliable 110 V AC, 50 Hz control coil and comes with integrated 1 Normally Open (NO) + 1 Normally Closed (NC) auxiliary contacts for signaling and interlocking. Its main and auxiliary circuits utilize robust screw terminals for secure and easy wiring, fitting the standard Size S3 form factor.

Benefit and Features

• High Performance: Robustly rated for 80 Amps and 37 kW motor switching applications (AC-3/AC-3e).
• Integrated Flexibility: Includes a built-in 1 NO + 1 NC auxiliary switch configuration, reducing the need for external components.
• Reliable Control: Operates with a common industrial standard 110V AC control voltage.
• Robust Connection: Secure and reliable electrical connections via the proven screw terminal design.
• Modular System: Part of the comprehensive Siemens SIRIUS modular system, ensuring optimal coordination with overload relays (e.g., SIRIUS 3RU2/3RB3) and other components for load feeder solutions.
• Compact Design: Offers high power density in a compact Size S3 footprint.
• Global Approval: Approved for worldwide use (e.g., IEC and UL/CSA), making it suitable for international machinery.

Function / Application

The Siemens 3RT2045-1AF00 power contactor is primarily used in industrial control panels for switching 3-phase AC motors.

• Direct-on-line starting of motors up to $37\text{ kW}$.
• Switching resistive loads (e.g., heating elements).
• Integration into control systems, motor starters, and automation circuits requiring remote or automatic high-current load switching.
• Essential component in reliable industrial power distribution and machine control systems.

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