Siemens 3RT2045-1AH20 Power Contactor 80A, 37kW, 400V, 3-Pole, 48V AC Original Brand New

Overview

The Siemens 3RT2045-1AH20 is a high-performance power contactor engineered for reliable and efficient motor control applications. Designed for AC-3e/AC-3 operation, this contactor offers a rated operational current of 80 A and motor power up to 37 kW at 400 V, making it ideal for demanding industrial environments.

Built with Siemens’ advanced contactor technology, it ensures long electrical life, reduced maintenance, and consistent switching performance. The 48 V AC coil voltage and screw terminal connections simplify installation and integration into existing systems.

Key Features & Specification

• Product Number: Siemens 3RT2045-1AH20

• Type: Power Contactor

• Utilization Category: AC-3e / AC-3

• Rated Operational Current: 80 A

• Motor Power: 37 kW (at 400 V)

• Poles: 3-Pole

• Coil Voltage: 48 V AC (50/60 Hz)

• Auxiliary Contacts: 1 NO + 1 NC

• Terminal Type: Screw terminal

• Size: S3

• Manufacturer: Siemens

Benefit

• Reliable Performance: Built with Siemens’ trusted engineering for high switching reliability in industrial applications.

• High Efficiency: Handles heavy loads efficiently with minimal power loss.

• Long Service Life: Durable contacts and superior insulation provide extended operating life.

• Compact & Easy Installation: S3 frame size ensures space-saving design and quick mounting.

• Versatile Compatibility: Suitable for various motor control systems in manufacturing, HVAC, and automation setups.

Function & Application

The Siemens 3RT2045-1AH20 power contactor is used for switching electric motors and other power loads. It ensures safe start/stop operations and can be integrated into motor control centers, power distribution panels, and automation systems.

Common applications include:

• Industrial automation systems

• Conveyor drives and pumps

• HVAC compressors and fans

• Machine tool control circuits

• Power distribution systems

For more of our industrial control products and the full SIRIUS range, please visit turll.