"I have had problems with multi-port SMT connector assemblies with a competitive product." We address this issue of multi-port SMT connectors below.


From Xmultiple Management

Xmultiple does not recommend the use of multi-port SMT connectors. Please call us so we can discuss the assembly issues involved with this type of connector. Xmultiple does have SMT connectors with and without magnetics in our product lines however users must understand the problems in assembly before using this type of connector. The fact that any connector is bulky and large make them more difficullt to assembly in a surface mount process. In most cases the connectors must be reworked by hand after the SMT placement process is performed.

In regard to assembly of surface mount connectors, SMT types of connectors have locating pins to assist assembly. However, SMT connectors do not have other hardware elements to secure them to the printed circuit board. The only attaching elements of SMT connectors are the shielding pin, the alignment post and the contact pins which are attached to the printed circuit board with paste which has heat applied to bond the connector to the printed circuit board. The SMT connectors strength is based upon the configuration of the leads and the proximity of the connector housing to the printed circuit board. The forces to be applied to the connectors must be determined in the design phases of the product so the proper connector scheme can be used to provide a reliable product.

Since surface mount connectors are not torqued down then this connector will not have the strength for many product requirements. Therefore, thru-hole connectors are in most cases the best solution for a product design. Please refer to the standard document IPC-A-610 section for Surface Mount Connectors.

Picture below is a SMT paste assembly machine.


This SMT assembly paste machine holds the connectors and components which are to be placed onto the printed circuit board, and also acts as the soldering medium.

Onne the paste is applied to the printed circuit board, the boards then pass through "pick-and-place" machines, also called "chip shooters."

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