Hermetic feedthroughs have been available commercially for some time and are frequently connected with applications in industries such as electronics, automotive, and even aerospace and defense. While they are becoming increasingly popular as a result of the resilience and electrical integrity they give to particular parts, you may still be curious about the characteristics of this critical vessel component.
Prior to delving into what hermetic feedthroughs are, it's critical to understand the fundamentals.
What is the definition of feedthrough?
A feedthrough connector is located between two circuit boards (or an enclosure). This type of connector can serve as an electrical conductor for certain types of environmental barriers or enclosures. Feedthrough can transfer low current or low voltage electrical signals (instrumentation feedthroughs) or high current or high voltage electrical signals (high voltage feedthroughs) (power feedthroughs).
What distinguishes feedthrough as hermetic?
Hermetic feedthrough is an electrical conductor that has a hermetic seal around it. This type of connector is entirely enclosed and designed to be completely airtight.
Feedthroughs are hermetically sealed to protect them from hostile surroundings and other sorts of extreme and harmful conditions that may surround them. Oxygen, moisture, and humidity are all kept out, as they would otherwise cause the sealed electric components to fail.
Additionally, the hermetic seals employed in hermetic feedthroughs might vary in composition and function. For instance, some are constructed using epoxy resins (epoxy hermetic seals), which are good at isolating specific gases and even some types of fluids.
On the other hand, some adopt hermetic glass-to-metal sealing technology (such as the ones used in vacuum tubes). They can endure more pressure and temperature (in comparison to epoxy hermetic seals, which operate within a narrower temperature range.
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