As the saying goes, "the sky will not fall out, but the good thing not something for nothing", surface mount is the same. You can not expect the surface mount connected with mechanical durability can be compared to the connecting through-hole reflow. This surface mount connector and your designs are not fair. You know, with very little contact with the surface of PCB surface mount connectors are standard through-hole only return half of the PCB connector pad area.
In some cases, a very reliable, surface mount connectors with through-hole in fact, return to compete with the connector. For example, the surface mount D-Sub connector will not fall off from the circuit board, because they are not part of the design of ultra-thin and slender type. However, we have actual knowledge of a surface mount D-Sub connectors that can withstand the stress was limited. In some cases, surface mount connectors to be the overall size of the connector with the same through-hole assembly reflow to ensure a reliable connection. For harsh environments for large daily stress relief pad, the shape and structure size to be similar to the connector through-hole reflow. Despite the fact does not provide savings of PCB, surface mount version provides dual-card density, simplified assembly, and may reduce manufacturing costs. In the I / O applications, consider using the surface mount connector. If the design of the circuit board space is limited, there are many surface mount connectors to choose from.
If you are considering using surface mount connector is not connected to ensure reliable PCB attachment, it is recommended that you may well opt out of the connector. Surface mount technology must have a strong mechanical attachment to withstand repeated and rough handling patch cycle. As a design engineer to respect the connector of your choice, does not mean that person will be so general assembly. Remember, unless the surface mount connector problems in the design, otherwise they will not fall off from the circuit board. Also, you need to carefully and thoroughly assess the connector is designed into the system may face the situation after all. For example, the surface mount connector can not stand and I / O mezzanine card, cable or heavy daily patch? Unplug the connector can withstand before and after the shaking may face action?
Double check that you are considering using surface mount connectors. Are there additional connector or solder pads to ensure a reliable connection anchor? Sure you are satisfied with the connector used by companies of any additional measures. Can you feel the real durability of the connector? It has provided a manual test board? Suppliers can provide the data X and Y dimensions shear test report?