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The outer shell of any connector is one of the key components and serves several roles. The shell provides protection for the electrical contacts and insulator within. Mechanical protection against impact and damage is provided by employing robust materials.

If the connector is waterproof, it is the shell that forms the greatest part of this protection. It must be designed so that rubber gaskets and O-rings will seal any gaps that might allow the ingress of water.


Plastic or Metal Shells?


The shell also guards against unseen hazards. If the connector needs to be protected against electromagnetic and radio frequency interference (EMI/RFI), it must be manufactured from a conductive material that will provide shielding.

It is also important to understand the environment in which the connector is expected to function. Any equipment that is designed for use in outdoor or field conditions will be subjected to moisture, changes of temperature and long-term exposure to UV radiation from the sun.

The material from which the connector is made therefore must be chosen with care. Metal shells offer electrical shielding and high mechanical strength. However, depending on the material chosen, they can be heavy and may risk corrosion if exposed to the elements for long periods of time.

In contrast, plastic materials offer resistance against corrosion and lighter weight. However, they are unshielded, and can be at risk of damage caused by long-term exposure to sunlight. Therefore, careful consideration of the advantages of both are necessary.


The Buccaneer Series of Waterproof Connectors from Bulgin is designed to provide superior mechanical and environmental protection. Sealed to IP68 and IP69K, the Buccaneer series is manufactured from UV-stable Polyamide, with some products available in stainless steel, offering customers high performance connectors that are suitable for a wide range of applications.

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