Reliability of the electronics industry with metallographic analyses, and environmental and fire tests

    13 March 2026

    Fiabilidad sistemas PCBA TECNALIA

    “TECNALIA enhances the reliability of the electronics industry with the metallographic, environmental and fire testing of PCBA systems”

    TECNALIA ensures the reliability of PCBA systems in critical environments

    The growing complexity of electronic systems has led the sector to demand more accurate, predictive solutions, a challenge to which TECNALIA has responded with evaluation technologies that make it possible to anticipate faults, validate processes and ensure the reliability of PCBAs in critical environments. Its ability to combine metallographic analyses, accelerated environmental testing and fire performance testing has put the organisation at the forefront of advanced verification of electronic components.

    TECNALIA reveals invisible defects in metallographic microsections

    The most notable techniques include metallographic microsections, which are essential for revealing invisible defects in welded joints, such as cracks, pores or changes in intermetallic layers.

    • This level of detail makes it possible to optimise welding processes and ensure compliance with demanding standards in areas such as the automotive, aeronautics, aerospace and defence sectors.
    • This is in addition to being able to analyse the formation of whiskers, which is key to preventing spontaneous short circuits by means of visual inspection, SEM and EDX, and evaluating surface finishes and conditions of ageing.

    Detecting vulnerabilities before the industrialisation of PCBA systems

    The accelerated environmental tests provided by TECNALIA reproduce extreme operating conditions–thermal shock, combined temperature and humidity cycles and free fall, making it possible to detect vulnerabilities before industrialisation. This predictive approach reduces costs associated with faults in the field and improves the robustness of designs, which is particularly valued in applications where reliability is critical.

    TECNALIA carries out fire tests on PCBA systems

    Fire tests have become a mainstay for sectors such as the railway industry, where the EN 45545-2 standard requires the combustion performance of on-board PCBAs to be validated.

    • TECNALIA carries out requirement R24, based on the EN ISO 4589 standard, which determines the limiting oxygen index (LOI) required for each risk level.
    • TECNALIA is helping the electronics industry move towards products that are safer, more robust and ready for today's operational challenges.