Siemens 3RT2045-3SP30 Power Contactor 80A, 37kW, 3-Pole, with Integrated Varistor Original Brand New

Overview

The Siemens SIRIUS 3RT2045-3SP30 is a high-performance, S3-size power contactor designed for reliable and efficient switching of three-phase AC loads. This robust contactor is engineered for use in demanding industrial environments, ensuring seamless operation of motors and other electrical equipment.

With its versatile AC/DC coil voltage and integrated varistor, it offers superior performance and protection against voltage spikes. The combination of screw terminals for the main circuit and spring-loaded terminals for control and auxiliary circuits provides flexible and secure connection options, making installation and maintenance straightforward.

Key Features & Benefit

• High Switching Capacity: Rated for AC-3e/AC-3 operation at 80 A and 37 kW at 400 V, this contactor is ideal for heavy-duty motor control applications.
• Versatile Coil Voltage: The wide control voltage range of 175-280 V AC/DC (50/60 Hz) simplifies integration into various control systems, including those powered by AC or DC sources.
• Integrated Varistor: Built-in surge protection minimizes wear on the coil and other components, extending the product’s lifespan and enhancing system reliability.
• Secure & Flexible Connections: The main circuit uses screw terminals for strong, reliable connections, while the control and auxiliary circuits utilize spring-loaded terminals for quick, vibration-proof wiring, reducing installation time.
• Compact S3 Size: Despite its high power rating, the S3 size offers a space-saving solution for control panels and electrical enclosures.
• Safety & Reliability: Equipped with one normally closed (1 NC) auxiliary contact, this contactor provides feedback and interlocking capabilities, improving the safety and control of your system.
• F-PLC-IN Compatibility: Designed for seamless integration with Siemens F-PLC (Fail-safe Programmable Logic Controllers), ensuring easy setup and reliable operation in safety-critical applications.

Function

The Siemens 3RT2045-3SP30 power contactor is used to remotely switch on and off electrical power to three-phase loads, most commonly electric motors. It acts as a heavy-duty relay, controlled by a low-power signal from a PLC, push button, or other control device. Its primary functions include:

• Motor Control: Starting, stopping, and reversing three-phase motors.
• Load Switching: Switching on and off resistive and inductive loads in industrial and commercial applications.
• System Protection: Providing a reliable point of isolation and control for safety and maintenance purposes.

Technical Specification

• Product Number: 3RT2045-3SP30
• Type: Power Contactor, AC-3e/AC-3
• Current Rating: 80 A
• Power Rating: 37 kW at 400 V
• Poles: 3-pole
• Control Voltage: 175-280 V AC/DC, 50/60 Hz
• Auxiliary Contacts: 1 NC
• Main Circuit Termination: Screw terminal
• Control/Auxiliary Termination: Spring-loaded terminal
• Size: S3
• Special Features: Integrated Varistor, F-PLC-IN

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