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Types And Common Terms Related To Circular Connectors

Views: 1770 Author: Site Editor Publish Time: 2021-10-25 Origin: Site

Circular connections are multi-pin connectors that are primarily utilized for interacting with the outside world. 

They can be used to transfer data, transmit electrical signals, or power electrical devices. 

Circular connectors have been built to transport what is known as a mixed signal and is referred to as a power and control connector in some circumstances.

Multi-pin connections such as this are utilized for both power and signal transmission.

Contacting  a good manufacturer of the product is advisable whenever you are in need to for circular connectors to transmit power or data in your organization. 

Circular Plastic Connectors (CPC)  And  Circular Metal-Shell Connectors (CMC)  

They are both designed by an OEM where the plug and receptacle are commonly configured to mate exclusively with their own connectors. 

The shell size, type of thread or coupling and contact arrangement disallow the insertion of connectors made for other applications or manufactured by other OEMs.

 Circular Connectors


The phrase "circular connection" was first used to refer to a circular plastic connector (CPC).

These connectors, also known as circular metal-shell connectors (CMC), are utilized in industrial applications that require a strong and secure wire connection. 

Circular connectors are built to withstand harsh conditions while still providing a secure connection for industrial applications. 

Other types of connectors, such as DIN connectors, military connectors, and micro or nano connectors, are also referred to as circular connectors.


Military Connections (MIL-SPEC) 

They are specially designed to meet the rigorous and rugged military criteria.

Military connectors designs considers the requirement to sheild the connection from the elements which makes them very suitable for military and aeronautical applications.


DIN connections

These types of circular connectors are multi-pin, high-frequency electrical connectors that comply with standards set by the Deutsches Institut für Normung (DIN), a German national standardizing body.

To ensure that pins line up correctly, the ends of DIN connections are round, notched, and protected by a metal skirt.

Contact pitches for micro and nano connectors are 0.05" (micro) and 0.025" (nano), respectively.

They are either straight or right-angled and have one or more rows of plated contacts.


Sizing of Contacts, Inserts, and Shells

The number of contacts, shell size, and contact diameter all describe circular connectors. Each connector is sized appropriately for its intended use. 

DIN or military standards are used to build standard circular connectors. The connector can accommodate a variety of contact sizes and may come with various insert alternatives.

Some connections are available without contacts or inserts. These connectors serve as a protective casing that can be tailored to fit unique needs.



The insert is an insulating body inside the shell. It's utilized to keep the electrical connections straight. 

Each insert is made to accommodate specific contact kinds or sizes. They have a contact configuration that allows them to handle as many conductors as  possible, provided there are contact slots available.

It is not necessary to use every available contact slot when wiring the connections.

An insert that can accommodate more than six terminations can also be utilized with a six conductor cable that meets the cable diameter criteria. 

In some circumstances, merely using a portion of the available contact slots is preferable so that the plug and receptacle can be orientated by aligning the blind or missing contacts.



Electrical contacts are made up of soft, high-conductivity, oxidation-resistant materials that are used to form electrical connections.

Through this substance, an electrical current passes through the circular connectors.


Dimensions of the Shell

The size of the connector is generally referred to as the shell.  The shell size is a two-digit value that is sometimes followed by a letter code. The two-digit number indicates the number of 1/16th inch increments in the shell's diameter.

In general, larger shell sizes are utilized to hold greater power connections. Smaller shells, on the other hand, are designed to accommodate smaller sensor contacts.

 To allow for flexibility in contact size and arrangement, intermediate shell sizes are used. Each shell is adaptable to a variety of cable diameters.


Contact us for premium circular connectors

 In transmitting a large amount of electrical power or data signals, it is prerequisite to acquire strong, durable, highly conductive circular connectors for steady and tight connections.

 You can click here to reach out to us for your highly efficient circular connectors.


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