érintkezellenállás

érintkezellenállás is a Hungarian term that translates to contact resistance. It refers to the electrical resistance that occurs at the interface between two electrical conductors when they are brought into contact. This resistance arises from imperfections on the surfaces of the conductors, such as oxides, dirt, or microscopic irregularities, which prevent complete and uniform contact.

The magnitude of contact resistance depends on several factors. These include the material properties of the conductors, the pressure applied between them, the surface finish, and the presence of any contaminants. Higher contact pressure generally leads to lower contact resistance, as it helps to deform the surfaces and increase the contact area. Similarly, cleaner and smoother surfaces tend to exhibit lower resistance.

Contact resistance is a crucial parameter in many electrical and electronic applications. In connectors, switches, and relays, high contact resistance can lead to power loss in the form of heat, reduced signal integrity, and potential failure of the device. For instance, in power transmission systems, even small amounts of contact resistance at joints can result in significant energy dissipation over long distances. In sensitive electronic circuits, contact resistance can introduce unwanted noise and alter signal levels. Therefore, minimizing contact resistance is often a design consideration, achieved through appropriate material selection, surface treatments, and ensuring sufficient contact pressure.