Spring LoadedSpring-loaded rectangular connectors are a type of electrical connector that uses a spring mechanism to make and maintain the electrical connection. These connectors consist of a plug and a socket, which are held together by a spring that exerts a force on the contacts inside the connector. The spring-loaded design allows the connector to make a reliable electrical connection, even if the plug and socket are not perfectly aligned, or if there is some movement or vibration in the system. Spring-loaded rectangular connectors are commonly used in applications where a secure, reliable connection is required, such as in military and aerospace systems, or in industrial and automotive applications. They may be used, for example, to connect two PCBs, or to connect a PCB to a cable or other device.