Siemens 3RT2045-3AH00 Power Contactor, 80A, 37kW, 48V AC Coil, Spring Terminals, S3 Size Original Brand New

Overview

The Siemens 3RT2045-3AH00 is a high-performance 3-pole power contactor designed for demanding industrial applications. Engineered for robust and reliable switching of loads, this contactor is rated for AC-3e/AC-3 operation, handling currents up to 80 A and motor power up to 37 kW at 400 V. Its compact S3 size and versatile terminal configuration make it a flexible solution for a wide range of control and automation systems.

Key Features & Benefit

• High Performance: Rated for 80 A (AC-3e/AC-3) and 37 kW at 400 V, making it suitable for a variety of industrial motor and load control applications.
• Reliable Operation: Features a 48 V AC, 50 Hz control coil, ensuring consistent and dependable switching performance in industrial environments.
• Versatile Terminal Design: The main circuit utilizes robust screw terminals for secure power connections, while the control and auxiliary circuits feature convenient spring-loaded terminals, enabling fast and reliable wiring.
• Integrated Auxiliary Contacts: Includes one normally open (1 NO) and one normally closed (1 NC) auxiliary contact, providing essential feedback and interlock functionality for complex control schemes.
• Space-Efficient Size: The compact Size S3 form factor allows for efficient use of panel space, simplifying machine design and installation.
• Globally Recognized Quality: Part of the trusted Siemens SIRIUS product family, ensuring compliance with international standards and a long service life.

Function

The Siemens 3RT2045-3AH00 power contactor is primarily used for switching electric motors and other loads in industrial settings. It acts as an electrically controlled switch, where applying voltage to the 48 V AC coil closes the main contacts, allowing power to flow to the connected load. The integrated auxiliary contacts provide a signal indicating the contactor’s state (open or closed), which is critical for interlocking circuits, status indication, and safety systems.

Technical Specification

• Product Number: 3RT2045-3AH00
• Manufacturer: Siemens
• Product Type: Power Contactor
• Standard: AC-3e/AC-3
• Rated Current (AC-3e/AC-3): 80 A
• Rated Power (AC-3e/AC-3): 37 kW at 400 V
• Poles: 3-pole
• Control Voltage: 48 V AC, 50 Hz
• Auxiliary Contacts: 1 NO + 1 NC
• Main Circuit Connection: Screw Terminal
• Control/Auxiliary Circuit Connection: Spring-Loaded Terminal
• Size: S3

Application

• Motor control and starting
• Pump and fan control
• Heating and lighting circuits
• Automation and machine building
• General industrial load switching

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