Siemens 3RT7025-1AF05 Contactor AC-3 18A/7.5kW, 110V AC Coil, Screw Terminal, Size S0 Original Brand New

Overview

The Siemens 3RT7025-1AF05 is a high-performance AC-3 contactor designed for reliable and efficient switching of three-phase motors and other electrical loads in industrial environments. Part of the trusted Siemens SIRIUS modular system, this contactor is engineered for durability and ease of use. With a compact Size S0 frame, it is perfect for space-saving installations in control panels and machinery. The robust screw terminals ensure a secure and long-lasting electrical connection, making it an excellent choice for a wide range of applications.

Key Features & Specification

• Product Number: 3RT7025-1AF05
• Rated Operational Current (Ie): 18 A at AC-3, 400V
• Rated Operational Power (Pe): 7.5 kW at AC-3, 400V
• Auxiliary Contacts: 1 Normally Open (NO) + 1 Normally Closed (NC)
• Coil Voltage: 110 V AC, 50 Hz
• Connection Type: Screw terminals for main and auxiliary circuits
• Frame Size: S0
• Standard: IEC 60947-4-1
• Mounting: DIN rail or screw fixing
• Operating Temperature: -25 to +60 °C

Benefit

• High Reliability: Built to Siemens’ exacting quality standards, ensuring long-term performance and minimizing downtime.
• Efficient Motor Control: Perfectly suited for switching AC motors, providing safe and reliable operation.
• Space-Saving Design: The compact Size S0 form factor allows for higher density installations in control cabinets.
• Easy Installation: Features clear markings and robust screw terminals for quick and secure wiring.
• Versatile Application: Ideal for a wide range of industrial applications, including pumps, fans, conveyors, and machine tools.
• Integrated Auxiliary Contacts: The built-in 1NO+1NC auxiliary contacts simplify control circuit design and wiring.

Function

The Siemens 3RT7025-1AF05 contactor acts as an electrically controlled switch used for switching power circuits. When the 110V AC control voltage is applied to the coil, it creates a magnetic field that closes the main contacts, allowing electrical current to flow to the connected load (e.g., a motor). The auxiliary contacts, which are mechanically linked to the main contacts, change state simultaneously and can be used for signaling, interlocking, or other control functions within a larger system. The “AC-3” rating signifies its suitability for squirrel-cage motors, which are frequently started and stopped.

Application

• Motor control for pumps, compressors, and fans
• Conveyor systems
• Heating and lighting circuits
• HVAC systems
• General industrial machinery
• Building automation and control panels

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