Siemens 3RT1076-2NB36 Power Contactor 500A, 250kW, Electronic Drive Original Brand New

Overview

The Siemens 3RT1076-2NB36 is a high-performance power contactor engineered for demanding industrial applications. As part of the SIRIUS 3RT product family, this contactor is designed for reliable and efficient switching of high-power loads. With a robust design and advanced electronic drive, it provides exceptional performance, longevity, and versatility.

This model is specifically tailored for seamless integration into modern automation systems, featuring a wide operating voltage range, PLC compatibility, and user-friendly spring-loaded terminals.

Key Features & Specification

• Product Number: Siemens 3RT1076-2NB36
• Contactor Type: Power Contactor
• Current Rating (AC-3e/AC-3): 500 A
• Power Rating: 250 kW at 400 V AC
• Operating Voltage: AC (50-60 Hz) / DC
• Control Supply Voltage (Uc): 21-27.3 V
• Control Drive: Electronic drive with PLC input (24 V DC)
• Number of Poles: 3-pole
• Auxiliary Contacts: 2 NO (Normally Open) + 2 NC (Normally Closed)
• Main Circuit Connection: Busbar connection for robust power distribution
• Control/Auxiliary Circuit Connection: Spring-loaded terminals for fast, secure, and vibration-resistant wiring

Benefit

• High Performance & Reliability: Rated for 500 A and 250 kW, it handles heavy-duty motor and load switching with ease.
• Energy Efficiency: The electronic drive minimizes coil power consumption, leading to lower operational costs and reduced heat generation.
• Advanced Control: Features a wide control voltage range (21-27.3 V) and a dedicated 24 V DC PLC input, ensuring compatibility with a broad range of industrial control systems.
• Space-Saving Design: The compact design and busbar main circuit connection optimize panel space and simplify wiring.
• Maintenance-Friendly: Spring-loaded terminals provide a reliable, maintenance-free connection, saving time and reducing the risk of wiring faults.
• Long Service Life: Engineered for millions of switching cycles, guaranteeing long-term durability in harsh industrial environments.

Application

• Motor control (start/stop) for high-power motors
• Switching of heating systems, transformers, and capacitor banks
• Industrial automation systems
• Heavy machinery and equipment control
• Energy and infrastructure projects

Function

The Siemens 3RT1076-2NB36 functions as an electrically operated switch, designed to safely make and break a high-power electrical circuit. When a control voltage is applied to its electronic drive, the main contacts close, allowing current to flow to the connected load (e.g., an electric motor).

The built-in auxiliary contacts provide status feedback to the control system (PLC), indicating whether the main contacts are open or closed, which is critical for safety and automation logic. The electronic drive ensures precise and rapid switching, reducing wear on the contacts and extending the product’s lifespan.