The OptiStart K-F assortment also includes OptiStart K-FR contactor relays, designed for switching control circuits and other low-current loads in automation solutions. Relays are produced in a four-pole design, with various combinations of NO and NC contacts. For all lines and versions in the assortment, a wide range of accessories is available, the use of which makes it possible to obtain the required configuration and precisely meet the technical specifications. The new OptiStart K contactor series represents the most modern solutions for motor control. The assortment includes both classic solutions with AC, DC, or AC/DC control coils, and modern OptiStart K-AF contactors with an electronic control coil power supply system, which possess numerous advantages compared to traditional solutions and fully satisfy all requirements of the modern market.