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an expansion issue, and the solution was to flatten the connector leads so they could be wire-bonded, creat- ing a stand-off that decoupled the connector’s thermal expansion from the board itself. While it may not have been an elegant solution, it performed perfectly when exposed to extreme temperatures. Another design consideration that all engineers must make is derating, which is unavoidable. As the tempera - ture increases, the maximum power that a connector can dissipate drops, meaning that the allowable current also drops. A connector that comfortably handles 3 A at room temperature might be dangerously over its limit when run at 200 °C. This can be solved with the use of more conductors to share power delivery, or by using larger contacts to ensure reliability under sustained thermal load. The material selection of a connector is equally critical. Metals with stable crystalline structures are generally preferred to avoid creep and deformation, and while some polymers can work (Vespel, for example, has a ceiling near 300 °C), they are generally avoided. When going beyond the 300 °C range, ceramics become the ideal material.
quickly, making options such as gold plating a necessity to preserve long-term contact reliability. Skipping this step might save money up front, but it usually means accelerated failure in service.
Nano miniature Flex Pin contact designed for reliable electrical engagement in compact interconnect systems. Precision contact geometry and high-quality plating help maintain consistent electrical performance and low contact resistance even under challenging environmental conditions. Extreme heat is an active, destructive force that un- dermines connectors through material degradation, thermal expansion, oxidation, and reduced power handling. Ignoring these effects is less a gamble and more a guarantee of premature failure. Reliable performance in such conditions demands delib - erate choices, where high-temperature alloys and stable polymers provide structural integrity, and protective platings like gold slow the growth of oxidation. Ther - mal expansion must also be anticipated and managed, whether through material pairing, minimized footprints, or design features that decouple stress from the PCB. At high temperatures, derating becomes mandatory, larger or additional contacts may be required, and PCB layouts must be planned with expansion and heat dis- sipation in mind. None of these measures is optional if long-term reliability is the goal. Ultimately, success in extreme heat comes from designing not for the “typical” case but for the worst-case. Connectors must be engi- neered with the expectation that the environment will push them to their limits, and the confidence that they will endure regardless. Visit Omnetics to learn more.
Metal-shell circular connectors provide structural integrity and environmental protection in demanding operating conditions. Robust connector housings and stable structural materials help maintain mechanical alignment and electrical reliability when systems are exposed to elevated temperatures and thermal cycling. Surface treatments, often overlooked in connector selection, can’t be overlooked. At high temperatures, oxidation accelerates and conductive paths degrade
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