Modular contactor ST40-31 modular contactor 3NO+1NC contacts I=40A coil voltage U=230V AC 3 modules

Modular contactor – reliable circuit switching

This modular contactor from F&F is a component designed for safe and efficient control of electrical circuits. It finds application in both home and industrial installations where frequent switching of the load is required. Mounting on a 35mm rail simplifies integration with existing electrical infrastructure, and the compact design (3 modules) saves space in the distribution board.

Functionality and technical parameters

The ST40-31 contactor is characterized by a 3NO+1NC contact configuration (three normally open and one normally closed), providing flexibility in connecting different types of loads. The rated current of 40A allows operation of devices with significant power, and the coil voltage of 230V AC is a standard in most electrical installations. Made of high-quality materials, it guarantees long-lasting and trouble-free operation. The IP20 protection class provides basic protection against touching and ingress of solid objects.

• Purpose: controlling lighting, electric heaters, motors and other electrical devices.
• Installation: quick and easy mounting on a standard 35mm rail.
• Contact configuration: 3NO + 1NC – enables various applications depending on the installation needs.
• Application: ideal for home, workshop and industrial facilities.
• Safety: compliance with IEC 61095 standard ensures a high level of safety.
• Durability: designed for intensive use, providing reliable operation for a long time.
• Weight: 241g – compact size and light weight facilitate installation and transport.
• Terminals: screw, permissible wire cross-sections up to 10mm² - ensure a secure connection of wires of different thicknesses.

Construction and practical application

Modular contactors from F&F are appreciated by installers for their solid construction and ease of installation. The design allows for quick connection of wires using screw terminals, which reduces installation time. This makes the product ideal for both professionals and people performing electrical work themselves. Characteristic C allows it to react more slowly to short current surges, therefore it tolerates starting devices with a motor well. It protects the circuit against overload and short circuit - like most circuit breakers in this class.