SMC connectors

Requirements for SMC connectors

Conventional SMC (Surface Mount Compatible) connectors have to withstand temperatures of up to 225°C in the reflow oven for 10 to 15 seconds. Industry is moving towards lead free soldering with temperatures in the range of 235°C up to 260°C. Peak values might be above this level. Therefore, the moulding must be made from a dimensionally stable plastic which expands at the same rate as the pcb material when subjected to heat.

For the reflow soldering homogeneous heat distribution and unimpeded access for convection heat is important to reach all the solder joints. This is particularly necessary when dealing with the higher reflow temperatures of lead free soldering.

The HARTING design of the har-bus HM+ connector meets this requirement. It guarantees good heat distribution to all soldered joints. Even contact row “a”, which is most hidden by the nature of design, is heating up during the known soldering process.

With this new concept, hard metric 2 mm har-bus HM+ connectors can now be fully integrated into the economic reflow soldering process.

HARTING connector mounted in a tape ready for placement using an odd from assembly station.

 

HARTING SMC technology

HARTING offers its customers a complete system concept for integrating SMC technology into existing production lines. In addition to har-bus® HM+ connectors we manufacture a wide range of SMC connectors, e.g. 3- and 5-row connectors, in compliance with DIN 41612, D-Sub connectors in compliance with DIN 41651 and connectors from the har-mik® series with contact spacing of 1.27 milimetres. In addition, HARTING supports the market with packaging and processing concepts, which have been developed in collaboration with renowned manufacturers of SMC soldering and assembly plants.

har-bus® HM+ connectors are ideally suited for fully automated assembly.
The benefits are:

 

har-bus® HM+ connector: