Siemens 3RT7025-1AQ05 Contactor 18A, 7.5kW, AC-3, Size S0, Screw Terminal Original Brand New

Overview

The Siemens 3RT7025-1AQ05 is a high-performance SIRIUS series power contactor designed for reliable and efficient switching of electric motors and other resistive loads. With a rated operational current of 18A (AC-3) and a power rating of 7.5kW at 400V, this compact Size S0 contactor is engineered for demanding industrial applications. Its robust design, combined with a coil voltage of 380V AC at 50Hz, ensures consistent performance and longevity. The integrated 1 Normally Open (NO) and 1 Normally Closed (NC) auxiliary contacts provide versatile control and signaling options, making it a cornerstone for motor control circuits, HVAC systems, and automation panels.

Key Features & Benefit

• High Performance: Optimized for AC-3 switching duty, ideal for controlling motors up to 7.5kW.
• Integrated Auxiliary Contacts: The built-in 1 NO + 1 NC contacts simplify wiring and reduce the need for external components, saving space and cost.
• Compact Design: The Size S0 form factor allows for high-density installation in control cabinets, maximizing panel space.
• Reliable Operation: Designed for long service life and high switching frequencies, ensuring minimal downtime.
• Secure Connection: The robust screw terminals provide a strong, vibration-proof connection, critical for industrial environments.
• Versatile Application: Suitable for a wide range of applications including motor control, lighting, heating, and power distribution.
• Trusted Brand: Part of the Siemens SIRIUS series, a globally recognized leader in industrial control products known for quality and innovation.

Function

The Siemens 3RT7025-1AQ05 functions as an electrically operated switch. When the 380V AC (50Hz) coil is energized, it generates a magnetic field that pulls the main contacts into a closed position, allowing power to flow to the connected load. Simultaneously, the auxiliary contacts change state—the NO contact closes and the NC contact opens—to provide feedback or control signals to the rest of the circuit. De-energizing the coil causes a spring to open the main contacts, interrupting the power supply to the load.

Technical Specification

• Product Number: 3RT7025-1AQ05
• Rated Current (AC-3): 18A
• Rated Power (AC-3): 7.5kW at 400V
• Coil Voltage: 380V AC, 50Hz
• Auxiliary Contacts: 1 Normally Open (NO) + 1 Normally Closed (NC)
• Size: S0
• Terminal Type: Screw Terminal
• Series: Siemens SIRIUS 3RT
• Mounting: DIN rail
• Standards: IEC 60947

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