Siemens 3RT2045-1AD20 Power Contactor 80A, 37kW, 42V AC, Size S3 Original Brand New

Overview

The Siemens 3RT2045-1AD20 is a high-performance, 3-pole power contactor designed for reliable switching of motors and other electrical loads. As part of the SIRIUS 3RT2 series, it is engineered for exceptional durability and efficiency in demanding industrial applications. This contactor features a robust design with a rated operational current of 80 A for AC-3e/AC-3 applications, a power rating of 37 kW at 400 V, and a 42 V AC control voltage.

The integrated 1 NO + 1 NC auxiliary contacts provide flexibility for signaling and control circuits. With its convenient screw terminals and compact size S3 form factor, the 3RT2045-1AD20 offers straightforward installation and integration into existing systems.

Benefit

• High Performance: Capable of handling significant loads up to 80 A and 37 kW, ensuring reliable motor control.
• Energy Efficiency: Optimized for low power consumption, reducing operational costs.
• Space-Saving Design: The compact S3 size allows for high-density installation in control cabinets.
• Reliable Operation: Built with high-quality materials and rigorous testing standards for long service life and minimal maintenance.
• Versatile Application: Suitable for a wide range of applications, including motor switching, resistive loads, and general-purpose switching.
• Easy Installation: Screw terminals provide a secure and straightforward wiring connection.
• Integrated Auxiliary Contacts: The 1 NO + 1 NC contacts simplify circuit design for monitoring and interlocking functions.

Function

• Motor Switching: Efficiently and safely switches on and off three-phase motors.
• Load Control: Controls other electrical loads such as heaters, lighting, and transformers.
• Remote Operation: Can be controlled remotely via the 42 V AC coil voltage.
• Signaling and Interlocking: The built-in auxiliary contacts can be used to signal the ON/OFF state of the contactor or for interlocking with other control devices.
• Overload Protection Integration: Can be easily combined with a SIRIUS overload relay for comprehensive motor protection.

Technical Specification

• Product Number: 3RT2045-1AD20
• Product Type: Power Contactor
• Operational Current (AC-3e/AC-3): 80 A
• Power Rating (AC-3e/AC-3): 37 kW at 400 V
• Poles: 3-pole
• Control Voltage: 42 V AC, 50/60 Hz
• Auxiliary Contacts: 1 NO + 1 NC
• Termination Type: Screw Terminal
• Size: S3

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