Backshells

Backshells are protective housings or covers that attach to the rear of a connector. Their primary function is to shield the solder connections and wire terminations from physical damage, environmental contaminants, and electrical interference. Backshells can also provide strain relief, preventing excessive bending or pulling on the wires at the point of connection. This is crucial for maintaining the integrity and reliability of the electrical system.

Materials commonly used for backshells include metal alloys like aluminum or zinc, as well as various plastics and polymers. The choice of material often depends on the application's requirements for durability, weight, conductivity, and cost. Metal backshells generally offer superior electromagnetic interference (EMI) and radio frequency interference (RFI) shielding capabilities.

Backshells come in a wide variety of designs to accommodate different connector types, sizes, and cable diameters. Some feature integrated strain relief mechanisms, such as grommets or clamping glands, while others may require separate components for this purpose. Cable glands, clamps, and ferrels are often incorporated into or used with backshells to secure the cable and prevent the wires from being pulled out.

The installation of a backshell typically involves threading it onto the connector body before the wires are terminated. Once the wires are soldered or crimped, the backshell is then brought forward and secured, enclosing the terminations. This process ensures a robust and protected connection. Backshells are essential components in many industries, including aerospace, telecommunications, medical devices, and industrial automation, where reliable and durable electrical connections are paramount.