Passive Component
Passive Component : A component whose functioning does not depend on an external input such as actuation, mechanical movement or supply of power. A passive component has no moving part, and, for example, only experiences a change in pressure, in temperature, or in fluid flow in performing its functions. In addition, certain components that function with very high reliability based on irreversible action or change may be assigned to this category. Examples of passive components are heat exchangers, pipes, vessels, electrical cables and structures. It is emphasized that this definition is necessarily general in nature, as is the corresponding definition of active component. Certain components, such as rupture discs, check valves, safety valves, injectors and some solid state electronic devices, have characteristics which require special consideration before designation as an active or passive component. Any component that is not a passive component is an active component
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