3RT1056-2NB36

Description

Overview

The Siemens 3RT1056-2NB36 Power Contactor is a high-performance solution designed for reliable switching of electric motors and power circuits. Engineered with precision, this 3-pole contactor supports AC-3e/AC-3 operation at 185A and 90kW (400V AC), making it ideal for industrial motor control and automation systems. With a durable electronic drive and spring-loaded terminal connections, it ensures secure and maintenance-friendly installation.

This model is part of Siemens’ world-renowned SIRIUS series — known for efficiency, longevity, and advanced protection features suitable for demanding electrical environments.

Key Benefits

• High Power Capacity: Handles up to 185A and 90kW at 400V AC, ensuring robust performance for large motors and industrial loads.

• Reliable Operation: Designed for both AC (50–60Hz) and DC Uc 21–27V supply voltages.

• Easy Integration: Features 3V PLC input at 24V DC for seamless connection with automation systems.

• Enhanced Safety: Equipped with 2 NO + 2 NC auxiliary contacts for flexible control and monitoring.

• Low Maintenance: Spring-loaded terminals ensure quick wiring and vibration-resistant operation.

• Compact and Durable: Engineered for space efficiency and long service life in harsh industrial environments.

Function & Application

The 3RT1056-2NB36 functions as an electromechanical switch for remote control of electrical power circuits. It is primarily used for:

1. Motor Switching: Starting, stopping, and reversing large three-phase AC motors (up to 90kW.
2. Load Switching: Controlling high-current resistive or inductive loads like heaters, lighting systems, and capacitors.
3. Automation Systems: Acting as an essential interface component, controlled directly by a PLC via the 24V DC input, in industrial machinery and plant systems.

For more of our products, including the full SIRIUS line and related components, visit Turll today.