Materials | Surfaces

Metallic materials
PTR HARTMANN PCB Terminal Blocks and PCB Multi-Connectors are made using only high quality metals. The use of various copper alloys, as well as bronze, stainless steel and specially surface-treated steel elements guarantees reliable contacts and minimizes corrosion.

Surface coatings
Surface coatings on various metallic materials prevent corrosion and wear, and optimize conductivity. The surface coatings used by PTR HARTMANN comply with the EU's RoHS and WEEE directives.

Tinning
All of our copper electrical contacts are tinned as a matter of course. The tin surface of solder contacts creates an excellent bond with standard solder material. A protective nickel barrier layer is applied prior to tinning to avoid any solderability loss by diffusion of the base material in the tin coating.

Gold plating
Gold's excellent electrical properties make it an ideal surface coating for multi connector systems that are used for low current and low voltage applications. Our gold plating thicknesses are 0.6-0.8 µm. Thinner or thicker gold plating is available by special order.

Plastic
PTR HARTMANN uses only insulating materials of tried and proven quality for insulation of live components – because terminal blocks and multi-connectors are required to meet very high standards when in service. For this reason, PTR HARTMANN uses for its insulating enclosures only PA6.6 and PPA polyamides, and PBT or LCP materials listed by the Underwriters Laboratories (UL). All insulating plastics conform inter alia to the maximum Classification V-0 fire-safety requirements of the UL 94 standard. In some cases, the materials used – and those for use in pin strips and reflow-soldered products, in particular – are glass-fibre-reinforced, in order to boost their mechanical strength and thermal stability.