Siemens 3RT7045-1AC20 Contactor AC-3, 80A/37kW, 400V, 24 VAC Coil, 3-Pole, Size S3, Screw Terminal Original Brand New

Overview

The Siemens 3RT7045-1AC20 is a high-performance, 3-pole AC-3 contactor designed for efficient and reliable switching of motors and electrical loads. Part of the renowned Siemens Sirius series, this contactor is built for demanding industrial environments. With a powerful 80A AC-3 rating at 400V and a compact Size S3 frame, it provides exceptional power density and operational reliability. Its 24 VAC control voltage and user-friendly screw terminals make installation and maintenance straightforward.

Key Features & Specification

• Product Number: 3RT7045-1AC20
• Contactor Type: AC-3
• Rated Operating Current: 80A at 400V
• Rated Operational Power: 37 kW at 400V (AC-3)
• Control Supply Voltage: 24 VAC, 50/60 Hz
• Number of Poles: 3
• Size: S3
• Terminal Type: Screw terminals
• Series: Siemens Sirius 3RT
• Application: Ideal for switching motors, resistive loads, and other inductive loads.

Benefit

• Exceptional Reliability: Engineered by Siemens, a global leader in industrial automation, ensuring long-term performance and durability.
• High Switching Capacity: Capable of handling high currents (80A) and power (37kW), suitable for a wide range of heavy-duty applications.
• Energy Efficient: Optimized design minimizes power consumption during operation.
• Versatile Application: Perfect for motor control circuits, HVAC systems, and other industrial machinery.
• Easy Installation: Clear markings and robust screw terminals simplify wiring and integration into existing systems.
• Compact Design: The Size S3 frame offers a high power-to-size ratio, saving valuable panel space.

Function

The Siemens 3RT7045-1AC20 contactor acts as an electrically controlled switch used for switching a power circuit. When a 24 VAC signal is applied to its coil, the contactor's main contacts close, allowing power to flow to the connected load. It is a critical component in motor starters, enabling remote control and providing a safe, reliable means of turning high-power equipment on and off. Its 3-pole configuration makes it ideal for controlling three-phase AC motors.

Application Area

• Industrial Automation
• Motor Control Systems
• Pump and Fan Control
• HVAC and Refrigeration
• Conveyor Systems
• General Machinery Control Panels

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