28 June 2024Enclosures, Racks, Cabinets & Panel Products
1. Consider the environment
In other words, what demands are placed on the connector set? What is the connector’s lifestyle? Easy or difficult?
An example of an easy life is one where the connector system is cycled (mated and unmated) maybe ten times or less, and it spends the rest of its life in a climate-controlled room. A difficult life is one that will require multiple cycles, and is subject to shock and vibration, constant movement, high humidity, temperature swings, and/or corrosive chemicals and vapours. Selecting the right contact system is critical to the success of the connector set, especially if your connector is going to live a difficult life.
Connector suppliers like Samtec offer a variety of contact systems, from basic designs for those connectors blessed with the easy life to rugged contact systems for those connectors that have it rough.
2. Consider normal force
One factor that will help you select the right contact is its normal force. Normal force has been called the single best predictor of connector performance. If you are considering two connector systems, and it appears both will work, choose the one with a higher normal force. This is important in harsh environments, and it’s keenly important if the environment experiences extreme temperatures or high shock and vibration.
3. Consider insertion depth
If you have narrowed your choice to two connector systems, and if you’re happy with the contact design and normal force of each, then another factor to consider is the socket’s insertion depth. The greater the insertion depth, the more stable the board stacking system will be.
4. Consider pin configuration
If your design requires 20 pins, use a 2 X 10 connector, not 1 X 20. The longer the connector, the more problems you may experience with coplanarity, alignment, and soldering.
5. Consider the centreline (or ‘pitch’)
This is mostly a matter of mechanical stability. A fine-pitch connector, meaning one with a centerline of 1,27 mm or smaller, will probably not be sufficient if it’s expected to be the sole means of mechanical stability between large or heavy PCB assemblies. Speaking for Samtec, the company has a variety of rugged, microminiature connector systems that are sturdy and well-designed, but you’re still asking for a small component to support a lot of weight and torque.
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