Micro-D EMI backshells connect cable shields to Micro-D connectors, providing strain relief and mechanical protection. These backshells are made out of aluminum alloy. Electroless nickel is the most widely used finish. These backshells are compatible with industry-standard metal shell M83513 type connectors.
EMI Versus Non-EMI Backshells
Select EMI backshells if your cable has a braided copper shield. The cable shield is secured to the backshell with a BAND-IT® strap, supplied with the backshell or purchased separately.
Select a strain relief backshell if your connector has individual wires or if your wire bundle does not have a metal shield.
EMI backshells do not normally require additional strain relief. Micro-D wires are typically potted, and the shield braid is a sufficient strain relief. An optional ty-wrap leg is available if necessary. Add "S" to the end of the part number.
Standard Band Versus Micro Band
Most Micro-D EMI backshells feature low profile band platforms designed for narrow (.125" width) micro band. Some have a taller band platform which also accepts standard bands (.250" width). Please refer to the "Backshell Selection Guide" on the preceding page to identify which backshells are compatible with both the standard band and the micro band.
One Piece Backshell Versus Split Backshell
Use one piece backshells if in stock availability is important. Split backshells allow installation after the other end of the cable has been terminated. Some split backshells fit over the connector, eliminating the highly magnetic clip. Split versions also can accommodate screw locks.
Jackscrews and Screwlocks
Jackscrews are fixed in position and must be turned in order to mate the connectors together. Screwlocks float and allow the connectors to be coupled before the screwlocks are engaged. Screwlocks allow faster mating, while jackscrews offer less risk of contact damage.
Elliptical Versus Circular Cable Entry
Choose elliptical backshells if the wire bundle diameter is too big to fit in a circular cable entry. Large Micro-D connectors (51 pins and up) usually exceed the limits of the round entries. Refer to the cable entry and wire bundle tables in this section to find out if an elliptical entry is necessary.
The actual size illustrations to the right show the difference between round and elliptical cable entries. The round entry circular mil area = π(½D)2 = .11 In.2. The formula for the area of an ellipse is π(Length)(Width) ÷ 4 = .36 In.2
- Product Selection Guide
- Micro-D Backshell Selection Guide | Glenair Qwik Connections
- General Information and Reference Data