If you are an electronic hobbyst, you are of course very familiar with this part. This part usually used on PCB, to make the circuit “portable”, easy connect and disconnect to another circuit modul safely without soldering the connector.
A screw terminal is a type of electrical connector where a wire is clamped down to metal by a screw.Screw terminals are commonly used to connect a chassis ground, such as on a record player or surge protector. Most public address systems in buildings also use them for speakers, and sometimes for other outputs and inputs.
One advantage of screw terminals are that no connectors are used, thus no compatibility problems with mismatched sizes or shapes. Additionally, the connections are very secure, both physically and electrically, because they firmly contact a large section of wire. This is also a disadvantage however, because it can take a few minutes to secure or undo a set of connections that could otherwise be simply plugged or unplugged. Another disadvantage is that their use with wire too thin is liable to partly cut through the wire.
Screw connectors sometimes come loose over time if not done up tightly enough at fitting time.
