– For obsolete components, reused parts may be the only option. IEC 62309 provides a defensible qualification path, but residual life estimation remains probabilistic.
If a reused part fails any test equivalent to a new part’s acceptance criteria, it must be rejected or downgraded (e.g., to a lower performance grade or spare part use only). 5.1 Unknown Usage History – The greatest challenge. Without accurate field data, stress from overvoltage, ESD, or moisture cannot be fully simulated. The standard allows risk-based sampling but does not mandate life modeling.
| Test Type | Purpose | Application Example | |-----------|---------|----------------------| | Visual & X-ray inspection | Detect cracks, corrosion, rework | PCBs, connectors, capacitors | | Parametric electrical test | Verify gain, leakage, timing | ICs, transistors, relays | | Burn-in (48–168 hrs at elevated temperature) | Expose infant mortality failures | Power semiconductors | | Thermal shock | Detect delamination or solder joint weakness | Automotive control modules | | Vibration + operational test | Intermittent fault detection | Electromechanical parts (fans, switches) |
– Extensive testing may exceed the cost of new parts, especially for low-value components. The standard is most beneficial for high-reliability or high-cost parts (e.g., aerospace, medical, industrial drives).