Siemens 3RT2045-1KB40 Power Contactor S3, 80A, 24V DC, PLC Compatible Original Brand New

Overview

The Siemens 3RT2045-1KB40 is a high-performance, 3-pole power contactor designed for reliable switching of motors and other electrical loads up to 80 A. This robust S3 frame size contactor is engineered for demanding industrial applications, offering exceptional durability and a long service life. Its compact design and versatile features make it an ideal choice for a wide range of control systems.

Key Features & Benefit

• High-Current Capacity: With an AC-3e/AC-3 rating of 80 A and 37 kW at 400 V, this contactor is capable of handling heavy-duty motor control applications with ease.
• Efficient DC Operation: The 24 V DC coil with an integrated varistor ensures reliable and low-power consumption operation, making it perfect for modern control circuits. The wide control range of 0.8-1.2*Uc guarantees stable performance even with fluctuating power supplies.
• PLC Compatibility: Specifically designed to be suitable for PLC outputs, this contactor simplifies integration into automated control systems, reducing complexity and installation time.
• Integrated Varistor: The built-in varistor provides surge protection for the coil, extending the life of the contactor and protecting sensitive upstream electronics like PLC outputs.
• Auxiliary Contacts: Equipped with 1 normally open (NO) and 1 normally closed (NC) auxiliary contact, it provides flexible feedback and control options for interlocking, signaling, and other control functions.
• Secure Screw Terminals: The screw terminals ensure a secure and reliable connection, simplifying wiring and maintenance while providing excellent resistance to vibration.
• Compact Frame Size S3: The space-saving S3 frame size allows for efficient panel layout and installation in tight spaces.

Technical Specification

• Product Number: 3RT2045-1KB40
• Rated Operational Current (AC-3e/AC-3): 80 A
• Rated Power (AC-3): 37 kW / 400 V
• Number of Poles: 3
• Control Voltage: 24 V DC
• Control Voltage Range: 0.8-1.2*Uc
• Auxiliary Contacts: 1 NO + 1 NC
• Terminal Type: Screw Terminal
• Frame Size: S3
• Special Features: Integrated varistor, suitable for PLC outputs

Application

The Siemens 3RT2045-1KB40 is perfect for a variety of applications, including:

• Motor Control: Starting and stopping of three-phase motors in industrial machinery.
• Pump and Fan Control: Reliable control of pumps, fans, and blowers in HVAC and fluid handling systems.
• Industrial Automation: Integration into automated production lines, robotics, and conveyor systems.
• Machine Building: Essential component for control panels in various types of machinery.