Connectors are crucial components that connect active devices and transmit current or signals. Their structures consist of contacts (which can be divided into male and female ones, mostly made of copper alloys and usually plated with metals on the surface), insulators (commonly made of plastics and used to fix and insulate the contacts), and housings (which can be made of metals or plastics and play a role in protection and mechanical connection). According to the nature of use, they can be classified into power connectors and signal connectors. In terms of appearance, there are many types such as circular and rectangular ones. In terms of performance, electrical performance includes rated current, voltage, and contact resistance; mechanical performance involves insertion and extraction forces and mechanical life; environmental performance encompasses temperature resistance, moisture resistance, and corrosion resistance. They are widely used in numerous electronic devices and various fields, and have different requirements to ensure reliable operation. 

FPC connectors are used to connect flexible printed circuit boards with other electronic devices. They consist of insulating bases, contact terminals and housings. Electrical connections are achieved based on the elastic deformation of the contact terminals. They have characteristics such as high flexibility, miniaturization with high density and good electrical performance, and have parameters like contact resistance. They are applied in fields such as consumer electronics, automotive electronics and medical electronics. 

Pin headers are direct insertion components with multiple pin-shaped pins. Female headers correspond to pin headers and are used to receive them. Electrical connections are achieved through the elastic contact between the pins and the metal springs when the pin headers are inserted into the female headers. They have characteristics such as high reliability, easy installation and disassembly, and a variety of specifications, and have parameters such as pitch, rated current and mating life. They are applied in fields such as the interiors of electronic devices, experimental circuit development boards, and industrial control and automation equipment. 

In addition to regular connectors, there are a variety of special connectors. For example: USB connectors (Type-A, Type-C, etc.)

Network port connector, SIM card holder, SD card holder, RF RF coaxial connector