PC, which stands for physical contact, is your most basic contact or surface polish on a fiber connector. Each is a different solution to the same problem: how do you get two glass surfaces to make perfect optical contact while keeping reflected light under control? Here is the technical. There are three main types of fiber connector polishes used in today's fiber optic applications. The connector end face or ferrule, is the housing for the exposed end of the fiber. When you wholesale or customize a fiber optic pigtail or fiber patch cables from suppliers in China, You may get reply quickly with questions like ” what fiber connectors do you need?”, ” what about the polishing type for the sc fiber connectors?” Frankly speaking, Polishing types in the inside. To put it simply, PC, UPC, and APC refer to the polish styles of the ferrules inside the fiber optic connectors, just as the following figure shows. When. When selecting fiber optic cables or connectors, you may notice product descriptions labeled with terms like "PC Polish," "UPC Polish," or "APC Polish. " What do these designations mean? What are the key differences between these connector types? This article provides a detailed explanation of these. Fiber optic connectors play a vital role in modern telecommunications and data transmission systems. They are essential for connecting optical fibers to various devices, enabling the transfer of data at high speeds with minimal loss.