Siemens 3RT1055-2NB36 Power Contactor, 150A, 75kW, PLC Input, Spring-Loaded Terminal Original Brand New

Overview

The Siemens 3RT1055-2NB36 is a high-performance power contactor designed for robust and reliable switching of electrical loads. This 3-pole contactor is rated for AC-3e/AC-3 operation at 150A and can handle motor loads up to 75 kW at 400V. Featuring an innovative electronic drive with a wide control voltage range (Uc​: 21-27.3V AC/DC) and a dedicated 24V DC PLC input, this contactor offers exceptional flexibility and integration into modern control systems.

Its compact design and versatile connection options—busbar for the main circuit and spring-loaded terminals for the control and auxiliary circuits—make installation and maintenance efficient. Equipped with 2 NO (normally open) and 2 NC (normally closed) auxiliary contacts, it provides additional signaling and control capabilities.

Key Benefit

• High Performance: Rated for 150A and 75kW, suitable for demanding industrial applications.
• Versatile Control: Electronic drive with a wide voltage range and dedicated PLC input ensures compatibility with various control systems.
• Space-Saving Design: Compact form factor allows for efficient use of panel space.
• Reliable Connections: Spring-loaded terminals offer vibration-proof, quick, and secure wiring, reducing maintenance time.
• Enhanced Safety: Integrated auxiliary contacts (2 NO + 2 NC) provide status feedback and interlock functionality.
• Durability: Built to Siemens’ high-quality standards for long-lasting operation in harsh industrial environments.

Function

• Motor Switching: Safely and reliably switches squirrel-cage motors for a variety of applications.
• Load Control: Used for switching resistive, inductive, and capacitive loads.
• Automation Integration: The 24V DC PLC input simplifies direct integration into automated control systems.
• Signaling: Auxiliary contacts provide feedback on the contactor’s status (open/closed) for monitoring and control.
• Overload Protection: Can be combined with an appropriate overload relay (not included) for comprehensive motor protection.

Technical Specification

• Product Number: 3RT1055-2NB36
• Type: Power Contactor
• Rated Operational Current (Ie​): 150A (AC-3e/AC-3)
• Rated Power: 75 kW at 400V (AC-3e/AC-3)
• Control Supply Voltage (Uc​): 21-27.3V AC/DC
• PLC Input: 24V DC
• Number of Poles: 3
• Auxiliary Contacts: 2 NO + 2 NC
• Main Circuit Connection: Busbar
• Control/Auxiliary Circuit Connection: Spring-Loaded Terminal
• Drive Type: Electronic

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