bedra electronics
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Wire solutions for the electronics industry Square and round wire

Quality is a question of precision Founded more than 120 years ago, the Berkenhoff GmbH produces innovative high-tech precision wires for electronic components, special applications, spark erosion, welding and brazing technology bedra is the only manufacturer of precision wire to offer the complete production process from one source: casting, rolling, drawing, annealing and electroplating. More than 30 million kilometres of precision wire in more than 100 alloys are produced annually in two German factories and sold under the umbrella brand bedra through representatives and sales companies...

Use of the purest metals ALLOY DIVERSITY Controlled melting process Alloy diversity bedra is a specialist supplier to the processing industry for high quality wire solutions in the electronics and electrical engineering sectors and covers all process steps from melting to surface refinement. More than 100 alloys, such as tin-bronze, brass and nickel-silver, as well as other special alloys, are produced in its own foundry from the element copper. 1. Own foundry technology 2. Highly conductive and thermosetting alloys With this alloy diversity, it is possible to cover an extensive range of...

Exact layer winding WIRE GEOMETRIES Precise knurling Wire geometries bedra electronics wires are used worldwide in passive, electromechanical and interconnect components. The miniaturisation of the components makes increasingly high demands of materials and processing technologies. Knowledge of materials and processing is the technological edge of bedra that makes possible new solutions in the final product for our customers. 1. Variety of wire geometries 2. Compliance with the narrowest tolerances bedra is a specialist in the manufacture of square, rectangular, octagonal profile, flat and...

Modern, high performance electrolytes SURFACE REFINEMENT Consistent coatings Highly pure tin anodes Surface refinement Various galvanic equipment is available for the production of a consistent surface quality for a variety of wire geometries and coating variants. The high quality level of the coatings is ensured through internal inspections in our own laboratory. The spectrum extends from simple pure tin coatings through variants with nickel or copper barrier layers to multilayer technology. The use of highly pure tin electrolytes ensures the fulfilment of requirements for high brazing...

MATERIALS / GEOMETRIES Materials Standardisation Surface finishes Physical properties of the materials Sn100 Matt Sn100 Bright Sn100 Reflow Sn100 Multiple layer Ag None • • • • • Ni • • • • Cu • • • • bedra type Tin-bronze alloys EN designation EN abbreviation CDA UNS No. Bz0.6 Density kg/dm3 Thermal conductivity W/m • K Coefficient of thermal expansion 10-6/K S•m/mm2 IACS % 8.9 185 17.8 ~25 ~42 8.9 90 18.2 12 Diffusion barrier layer Electrical conductivity ~20 CuSn4 CW 450 K Bl5 CuSn5 CW 451 K C51000 8.8 75 18.5 9.5-10.5 ~16-18 B65 CuSn6 CW 452 K C51900 8.8 75 18.5 8.0-8.5 ~14 Bl80 CuSn8...