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Rectangular Connectors - Headers, Receptacles, Female Sockets - have a wide application field and varied working principle.

A rectangular connector can be a male connector, typically with pins that fit into female sockets. Rectangular headers can be used to bridge separate electronic components to form a single functional unit. Receptacles are also rectangular, and usually have a series of holes or slots to provide access to a circuit or terminal. They are commonly found on printed circuit boards or in equipment panels where multiple wires need to be quickly and easily interconnected. Female sockets are another form of rectangular connector, and typically consist of an insulated housing with one or more contacts which can be inserted into a mating male connector.

The application field of rectangular connectors is varied. They can be used in the automotive and transportation industries for data and communication, as well as in medical and industrial applications. Rectangular connectors may also be used in communication devices, computer and consumer electronics, and aerospace and avionics systems. In addition, they can be used in harsh environment applications such as military and defense, marine, and oil & gas applications.

The working principle of rectangular connectors is to provide reliable electrical, data, and mechanical connection between two components. They feature contacts that are made of insulation displacement or insulation materials, such as brass, phosphor bronze, and stainless steel. Connectors also have contact retention features to ensure that the contacts are held firmly in place when connected. Other features include polarization, dustproofing, shock protection, vibration resistance, and EMI/RFI shielding.

Rectangular connectors offer an easy and cost-effective way to interconnect components in a wide range of applications. By using a variety of contacts, they provide an electrical connection between two or more devices while maintaining a secure mechanical hold. As compared to traditional cable harnessing, they are shorter and lighter in weight and often reduce total system cost due to their cost efficiency.

In summary, rectangular connectors are a versatile and reliable connection solution which has a wide application field and varied working principle.