Product Description

🔹 Power Contactor with Mirror Contact Elements, Screw Terminals, AC Coil – 3RT2018-1AF028K

🔹 Product Description

The Siemens 3RT2018-1AF028K is a SIRIUS 3RT2 series 3-pole power contactor designed for reliable switching of three-phase motors up to 7.5 kW at 400 V AC. It features mirror contact elements, screw terminal connections, and a 110 V AC control coil (50/60 Hz, 120 V AC at 60 Hz), making it suitable for motor control centers (MCCs), automation systems, HVAC applications, and industrial power distribution systems.

This model belongs to the compact S00 frame size and is rated for AC-3 / AC-3e duty up to 16 A, making it suitable for medium-duty motor switching applications where higher current handling and reliable control are required.

According to Siemens SIRIUS technical specifications, the 3RT2018 series supports 16 A AC-3 rating and 7.5 kW motor switching at 400 V AC, with screw terminal construction ensuring secure wiring and long-term industrial reliability in control panels.

The integrated mirror contact elements provide mechanically linked feedback of the main contacts, which is essential for PLC interlocking, safety circuits, and machine monitoring systems, allowing controllers to verify the actual ON/OFF state of the contactor for safe operation and diagnostics.

With screw terminals, the device ensures vibration-resistant, secure wiring suitable for continuous industrial operation.

🔹 Key Features

• Siemens SIRIUS 3RT2 series power contactor
• Model: 3RT2018-1AF028K
• 3-pole motor switching contactor
• Rated AC-3 current: 16 A
• Motor rating: 7.5 kW @ 400 V AC
• Control coil: 110 V AC (50 Hz) / 120 V AC (60 Hz)
• Mirror contact elements for safety feedback
• Screw terminal connection system
• Compact S00 frame size
• 1 NO auxiliary contact (typical for AF02 family variants)
• High electrical endurance and reliable switching
• Suitable for industrial automation and MCC panels
• Compatible with Siemens SIRIUS modular accessories