PF controllers fulfill a key function in PFC systems. They measure the actual power factor and connect or disconnect capacitor stages to achieve a specific desired cos ᵠ value. The series of EPCOS PF controllers offers highly intelligent control behavior. Thanks to its plain language menu-driven operation, it is very user-friendly. The multifunctional display of the PF controllers greatly simplifies installation, handling and maintenance. The different versions of the EPCOS PF controllers provide solutions to various applications.