Siemens 3RT1075-6AB36 SIRIUS Power Contactor, 400A, 200kW, 23-26V UC Coil, Size S12 Original Brand New

Overview

The Siemens 3RT1075-6AB36 SIRIUS Power Contactor is a robust, high-performance industrial switching device from the proven SIRIUS modular system, specifically engineered for demanding motor and load control applications. This size S12 contactor is designed to handle substantial loads, offering a high operating current of 400 A (AC-3e/AC-3) and a power rating of 200 kW at 400 V.

The device features a versatile conventional drive coil that accepts a wide-range UC (Universal Current) control voltage of 23-26 V AC (50/60 Hz) / DC, ensuring flexibility in control system integration. Its robust design is optimized for efficiency, reliability, and compact panel installation, making it ideal for the most challenging industrial environments.

Benefit

1. High-Power Capability: Rated for $400\text{ A}$ and $200\text{ kW}$, it is perfectly suited for controlling high-power industrial motors, pumps, fans, and heating systems.
2. Global Standard Compliance: Part of the SIRIUS modular system, providing seamless integration and worldwide approval (IEC, UL/CSA, and more).
3. Universal Control Voltage (UC): The $23-26\text{ V}$ AC/DC coil simplifies stock-keeping and wiring, offering maximum flexibility in control system design.
4. Integrated Auxiliary Contacts: The built-in $2\text{ NO}+2\text{ NC}$ auxiliary contacts save panel space and reduce wiring effort for feedback and interlocking circuits.
5. IE3/IE4 Motor Ready: Complies with the stringent requirements for switching highly efficient IE3 and IE4 motors under the new AC-3e utilization category.
6. Rugged and Reliable: Engineered for a long mechanical service life and reliable switching performance, even under extreme conditions.

Function

The 3RT1075-6AB36 functions as a high-capacity power switch used to safely and reliably control the flow of electrical power to large three-phase loads, most commonly electric motors. It is activated by a low-power signal from a control system (e.g., PLC, push-button) applied to the $23-26\text{ V}$ coil. When energized, the coil closes the three main power contacts, connecting the $400\text{ V}$ supply to the load. The auxiliary contacts provide crucial signaling for the control circuit, indicating the contactor’s current status (open or closed).

Application

• Switching three-phase $\text{AC}$ motors up to $200\text{ kW}$
• Control of industrial machinery and automated systems
• Heating, ventilation, and air conditioning (HVAC) systems
• Pumping stations and compressor control
• High-capacity load switching in power distribution

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