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Back Shell Definition
BACK SHELL. The rear portion of a connector, which is normally a separate section from the connector head. Also called a Hood.
Connector Back Shell
D-Sub Connector Back Shell per MIL-C-24308/20
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A Back Shell is used to shield the wire connection points of the inter-connecting cable and the connector. Some Back-Shells include a cable clamp [shown above] to secure the cable to the back shell and connector. The length of the cable clamp varies with the connector and the number of wires the connector accepts, the more wires the larger the back shell. A grommet may be supplied which needs to be sized to the Outside Diameter [OD] of the cable. In some cases the back-shell may only consist of Threaded Strain Relief. Backshells may also be purchased as a 90° Backshell or 45 degrees Back shell, with EMI or Environmental protecting.
In some cases the cable shield is connected to the back shell, in other cases the cable drain wire connects to the back shell. However, there are cases when no wire is attached to the shell of the connector or the back shell so that no connection is passed from the cable to the attachment point.
See Definition of Faraday Shield.
Manufacturers of Connectors
Manufacturers of Cable Clamps
Manufacturers of Cable Strain Reliefs
MIL-C-24308/20; [MIL D-Sub Backshells]; Connectors, Electric, Rectangular, Miniature, Polarized Shell, Rack and Panel, Shield, Straight, Deep
MIL-C-85049/11; [MIL Cylindrical Backshells]; Connector Accessories, Electrical, Backshell, Environmental, Cable Sealing, Straight, Category 1A, (for Mil-C-5015 Crimp, MIL-C-26482 Series 2, MIL-C81703 Series 3, and MIL-C-83723 Series III Connectors. [M85049]
MIL-C-85049/12; [MIL Cylindrical Backshells]; Connector Accessories, Electrical, Strain Relief, Self-Locking and Non-Self-Locking, Straight, Category 4B (for Mil-C-5015 Crimp, MIL-C-26482 Series 2, MIL-C81703 Series 3, and MIL-C-83723 Series III Connectors.
