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D-sub, D-shaped connectors include a variety of different contact types, from shielded shields to soldered twisted pairs and more. There are many types of contacts that can be used with D-subs, each with different characteristics that should be considered for different applications. Depending on the type of application, different contact types will be better suited.

Pins and Sockets

Pins and Sockets are the most common type of D-sub contact and are available in both shielded and unshielded varieties. The contacts are designed to plug directly into a mating socket of the same size, but different depths may be required for different applications. The contacts come in several different styles, from pins that are soldered onto a PCB, to insulated sockets that plug directly into a PCB. The contacts can also be crimped or soldered to a wire.

Shielded Contacts

Shielded contacts are ideal for applications involving a high degree of electrical interference. The contacts provide an extra layer of protection from EMI, and they also help to reduce crosstalk between different contacts. These contacts can be either soldered directly to a PCB, or crimped to a wire. The shielded contacts should be installed before other components and wires, as they have to be electrically connected to the enclosure for the shields to work correctly.

Soldered Twisted Pairs

Soldered twisted pairs are typically used in applications that require a high degree of reliability. The contacts provide greater mechanical stability then standard contacts, making them ideal for applications with a large number of contacts in a tight space. The contacts can be soldered directly to a PCB or crimped to a wire. The contacts should be installed in the proper orientation to ensure that the twist is maintained for maximum performance.

Edge Connectors

Edge connectors are a type of contact that is designed to provide a secure connection between two PCBs. The contacts are soldered to the edge of a PCB, providing a strong mechanical connection between the two boards. The contacts can be easily customised to meet the requirements of different applications. The contacts are usually rated for up to 3 amps, making them suitable for low voltage applications.

Terminal Blocks

Terminal Blocks allow for the connection of multiple wires to a single contact. The contacts are designed to provide a secure connection and are available in several different configurations. The contacts can be either soldered directly to a PCB, or crimped to a wire. The contacts offer a wide range of current ratings, making them suitable for both high and low voltage applications.

Working Principle

The working principle of D-sub connectors is the same regardless of the type of contact. When two mating D-sub connectors are connected, the pins create an electrical contact between the two connectors. The contact or contacts then pass electrical current from one connector to the other. The current passes through the contact and out of the connector, providing power to the device connected to the connector.

Conclusion

D-sub, D-shaped connectors provide a variety of contact types that are suited to different applications. From shielded contacts for EMI protection, to soldered twisted pairs for signal integrity, the contacts offer a wide range of options. The working principle of D-sub connectors is the same regardless of the contact type, and the contacts can be customised to fit the requirements of different applications.

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