1731110072

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D-Sub mini connectors are widely used for personal computers, industrial instrumentation, communications, medical equipment, and many other applications. The physical size of a D-Sub connector is approximately one-third of the typical circular connectors. It is composed of a plastic dielectric insulation body, pins and sockets, and a metal shell. The metal shell, also known as Backshell, is used to provide mechanical strength, strain relief, environmental protection, and support for cable termination.

Backshells are designed to allow a variety of options to customize the electrical and environmental characteristics of the connector. These customizations include protection against EMI, improved contact reliability, and environmental sealing. Backshells provide integral strain relief for the mating cable, and protect all parts of the connector from environmental contamination.

When it is necessary to protect the mating pins and sockets, a metal hood, also known as mating shell, is used. A metal hood or shell is used when increased electrical contact reliability is desired and protection from environmental contamination is required. The hood is a two-piece metal shell comprised of a body and a mating clamp that securely connects the hood to the connector when the cable is mated to the connector.

The main purpose and working principle of D-Sub, D-shaped connectors and Backshells, Hoods is to provide the mechanical stability and reliability of a mechanical connection. To ensure the highest level of performance, the contact points should be evenly distributed inside the connector. This ensures that the specific needs of the application can be met by providing uniform electrical contact forces on the pins and sockets. The conductor strands should be properly terminated to match the current flow required for the specific application.

D-Sub connectors are designed with a dielectric insulation body that can hold its configured shape and remain durable under various temperatures and environmental conditions. The contacts are usually made of gold, plated steel, or beryllium-copper. The use of a gold contact ensures good electrical contact and prevents oxidation caused by atmosphere or other influences. The contact pins and sockets are designed to fit together precisely preventing any inadvertent disconnection.

Metal shells provide shielding to protect against electrical interference or electromagnetic fields. The shielding provides resistance to electromagnetic fields generated by external sources. The shielding also reduces noise and crosstalk by limiting the number of possible points on the connector that can pick up electromagnetic interference. Additionally, most shells are rated for ingress protection, which can prevent dust, moisture, and other environmental contaminants from entering the interior of the connector.

Metal hoods consist of two metal pieces –a body and a mating clamp. They are designed to securely connect the hood to the connector when the cable is mated to the connector. The body and the mating clamp provide additional mechanical strength, strain relief, and EMI protection. The mating clamp engages with the connector body to provide a secure electrical connection, which prevents any unintentional disconnection.

In summary, the 1731110072 application field and working principle of D-Sub, D-shaped connectors and Backshells, Hoods provide electrical and mechanical reliability, EMI shielding, strain relief, and environmental protection for electronic and industrial connections. The contacts are designed to achieve high electrical performance, while the metal shell and hood provide protection against EMI, dust, and moisture. Together, these components provide strong, reliable, and protected connections.

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