News And Events

A Beginner's Guide to Circular Connector Terminology and Specifications

Views: 733 Author: Site Editor Publish Time: 2023-07-06 Origin: Site

Circular connectors are essential components used in various industries for reliable electrical connections. This beginner's guide aims to familiarize you with the terminology and specifications associated with circular connectors. Whether you're a student, hobbyist, or professional, understanding these concepts will help you make informed decisions when selecting and working with circular connectors.

What Are Circular Connectors?

Circular connectors are electrical connectors designed with a round interface that enables the mating and unmating of two or more electrical conductors. They provide a secure and durable connection while protecting against environmental factors such as moisture, dust, and vibrations.

Circular Connectors1.png

Key Terminology


A contact refers to the conducting element within a connector that establishes an electrical connection between two mating connectors.


The shell is the outer housing of a circular connector. It provides mechanical support, protects the internal components, and ensures proper alignment during mating.

Coupling Mechanism: The coupling mechanism determines how the connector is mated and secured. Common coupling mechanisms include threaded, bayonet, push-pull, and snap-lock.


Polarization involves designing the connector with features that ensure correct alignment during mating. This prevents damage and ensures proper electrical connections.

Insertion/Extraction Force:

These refer to the amount of force required to insert and extract the connector. Low insertion/extraction forces are desirable for ease of use.

Circular Connectors2.png



Circular connectors come in various sizes, typically denoted by a numerical code. Common sizes include M8, M12, M23, and MIL-DTL-38999.

Voltage Rating:

The voltage rating specifies the maximum voltage that a connector can safely handle without experiencing electrical breakdown.

Current Rating: 

The current rating indicates the maximum current that a connector can carry without overheating or causing damage.

IP Rating:

The Ingress Protection (IP) rating determines the connector's resistance to dust and moisture. It is represented by two digits, with higher numbers indicating greater protection.

Operating Temperature:

This specification indicates the temperature range in which the connector can safely operate without performance degradation.


Circular connectors play a vital role in establishing secure electrical connections across various industries. By understanding the terminology and specifications associated with these connectors, you are better equipped to select the right connector for your application. Whether you're working on a DIY project or dealing with complex industrial systems, this beginner's guide serves as a foundation for your circular connector knowledge.

Remember to consider factors such as contact type, shell design, coupling mechanism, polarization, and specifications like size, voltage rating, current rating, IP rating, and operating temperature when choosing circular connectors. With this knowledge, you can ensure reliable and efficient electrical connections that meet your specific requirements.


Contact Us



Company Name

By continuing to use the site you agree to our privacy policy Terms and Conditions.

Recruit global agents and distributors Join us

I agree