Siemens 3RT1055-2NF36 SIRIUS Power Contactor, 150A, 75kW, 96-127V AC/DC Electronic Coil, Spring Terminal Original Brand New

Overview: Siemens 3RT1055-2NF36 SIRIUS Power Contactor

The Siemens 3RT1055-2NF36 is a robust, high-performance SIRIUS 3RT1 series power contactor designed for reliably switching electric motors and other heavy loads in industrial automation and control systems. As a 3-pole contactor in the compact Size S6 frame, it is engineered for exceptional endurance and high operational current capacity.

A key feature is its advanced electronic drive (or “coil”) which supports a wide control voltage range of $96\text{V}$ to $127\text{V}$ for both AC and DC operation, offering superior flexibility and stable switching performance. Furthermore, it includes a dedicated $24\text{V}DC$ PLC input interface, enabling direct and efficient control from a Programmable Logic Controller without requiring an additional coupling relay.

Key Technical Specifications

• Product Number: 3RT1055-2NF36
• Contactor Series: Siemens SIRIUS 3RT1
• Application: Power contactor for switching motors (AC-3e/AC-3) and non-motor loads (AC-1)
• Rated Operational Current (AC-3e/AC-3): $150\text{A}$ at $400\text{V}$
• Rated Operational Power (AC-3): $75\text{kW}$ at $400\text{V}$
• Main Poles: 3-pole
• Control Voltage (Uc, Electronic Drive): $96\text{V}$ to $127\text{V}$ AC ($50$–$60\text{Hz}$) / DC (Wide Voltage Range)
• PLC Control Input: Dedicated $24\text{V}DC$ interface for direct PLC connection
• Auxiliary Contacts: Pre-installed $2NO+2NC$
• Main Circuit Connection: Busbar connection
• Control/Auxiliary Circuit Connection: Spring-loaded terminals (Spring-type terminals) for fast, vibration-proof, and maintenance-free wiring.
• Size: S6

Benefit

• Integration with Automation: The electronic drive with a dedicated $24\text{V}DC$ PLC input simplifies wiring and direct interfacing with modern PLC systems, saving both component and labor costs.
• High Reliability & Endurance: Part of the trusted Siemens SIRIUS modular system, designed for a long mechanical and electrical service life, ensuring dependable motor and load switching.
• Flexible Control Power: The wide $96$–$127\text{V}$ AC/DC control voltage range allows for standardization across various control power supplies.
• Fast & Secure Wiring: Spring-loaded terminals on the control and auxiliary circuits provide a rapid, secure, and vibration-resistant connection, reducing installation time and increasing operational reliability.
• Compact Design: The Size S6 contactor maintains a compact footprint, maximizing space efficiency within control cabinets.

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