Qualification

The robustness and reliability of solid press-fit technology is often proved in different qualification programs, tests and in the field.

The tests were done by independent test laboratories carried out by our customers or internally in our test laboratory. The following table shows an extract from the successful completion of tests and qualifying conditions confirming the robustness and reliability of press-fit technology.

  1. Tests in accordance with applicable standards
    • International Standards for Road Vehicles
      • ISO 16750: Environmental conditions and testing for electrical and electronic equipment
    • Mechanical Tests in accordance with
      • IEC 60068-2-6 Vibration (sinusoidal)
      • IEC 60068-2-27 Shock and -29 Multiple Shock
      • IEC 60068-2-32 Free Fall
      • IEC 60068-2-64 Vibration, broadband random and guidance
      • IEC 60068-2-80 Vibration- Mixed Mode
    • Climate Tests in accordance with
      • IEC 60068-2-1 Cold and -2 Dry Heat
      • IEC 60068-2-11 Salt Mist and -52 Salt Mist,
      • IEC 60068-2-14 Change of Temperature
      • IEC 60068-2-30 Damp Heat, cyclic and -78 steady state
      • IEC 60068-2-38 Composite Temperature/ Humidity cyclic test
      • IEC 60068-2-60 Flowing mixed gas corrosion test
    • Standards for Connectors for electronic equipment
      • IEC 60512-2-2 Contact Resistance
      • IEC 60512-2-5 Current Carrying Capacity
      • IEC 60512-16-4 Tensile Strength
      • ISO 8092-2 Connections for on-board electrical wiring harnesses
      • LV 214 Automotive Connectors
    • Degrees of protection provided through enclosures (IP-Code) in accordance with IEC 60529
    • Press-Fit Connections in accordance with IEC 60352-5
  2. Internal Tests
    • Press Fit Zone
      • Drill hole diameter
      • Copper thickness in the drill hole (comparison of plated through hole and drill hole)
      • Holding forces as a function of the copper thickness in the PTH
      • Correlation between the holding forces and current carrying capacity
      • Holding forces before and after the vibration
      • Permissible torque
      • Surface of the PTH
      • Cold welding
      • Diffusion Cu/Sn
    • Simulations
      • Current carrying capacity of the press-fit zone
      • Torque loading of the power elements
    • Manufacturing
      • Press-in before and after the coating of the PCB
      • Influence of the sealing
      • RoHS Compliance
    • Assembly Tests
      • Insertion and pulling forces of the relay and fuse sockets
      • Long term stability
      • Arc load test
      • Press-fit vs. Solder technology
  3. External Tests (by customers)
    Some of our products are customized solutions developed for various applications and operating conditions. In the development and prototype phase, the customers perform a lot of different tests and qualification programs, often in the real environment to prove the reliability and functionality of the solutions before they go into series production. ?