Siemens Power contactor, 3-pole, 2NO + 2NC, 200kW / 400V, 400A Part number 3RT1075-6AF36

Product Overview

The Siemens 3RT1075-6AF36 is a three-pole power contactor from the SIRIUS 3RT1 series, size S12. It is designed for switching motors and high-load systems in industrial applications. With a rated operational current of 400 A (AC-3, 400 V) and a control voltage of 110–127 V AC/DC, it ensures reliable performance for heavy-duty motor control and power distribution systems. The contactor is built to handle frequent switching operations and provides long mechanical and electrical endurance.

Key Features

• Three-pole power contactor for industrial motor and power control applications
• Rated operational current: 400 A (AC-3, 400 V)
• Control voltage: 110–127 V AC/DC
• Rated motor power: up to 200 kW at 400 V
• Includes 2 normally open (NO) and 2 normally closed (NC) auxiliary contacts
• High mechanical life expectancy and robust construction for demanding environments
• Compact design suitable for switchgear assemblies and motor starter combinations

Technical Specifications

• Product Series: SIRIUS 3RT1 Power Contactors
• Article Number: 3RT1075-6AF36
• Number of Poles: 3
• Rated Operational Current (AC-3, 400 V): 400 A
• Rated Motor Power (AC-3, 400 V): 200 kW
• Rated Insulation Voltage (Ui): 1000 V
• Rated Impulse Withstand Voltage (Uimp): 8 kV main circuit, 6 kV auxiliary circuit
• Control Supply Voltage: 110–127 V AC/DC
• Auxiliary Contacts: 2 NO + 2 NC
• Contactor Size: S12
• Mounting Type: Vertical or side-by-side mounting
• Ambient Operating Temperature: –25 °C to +60 °C
• Mechanical Service Life: Approx. 10 million operations
• Electrical Endurance: Approx. 1 million operations (AC-3 duty)
• Net Weight: Approx. 10.34 kg

Compliance & Certifications

• Complies with IEC / EN 60947-4-1 standards for contactors and motor starters
• Manufactured under Siemens SIRIUS quality and reliability standards
• Designed for global use in industrial automation and power systems

Applications

The Siemens 3RT1075-6AF36 is suitable for use in heavy-duty motor control, power distribution, and industrial automation systems. Common applications include large motor starters, compressors, pumps, conveyors, and machinery requiring frequent switching at high currents. Its robust design ensures durability and reliable performance in demanding environments.