Probably some fail-safe, some reliable. I think that this is why 'safety' involves risk-assessment, not just meeting standards.

John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK

On 2018-03-08 21:41, Richard Nute wrote:

In my early days in product safety, safety was prohibited from relying on conduction in a vacuum, gas, or semiconductor.

Today… we rely on semiconductor current limiters and similar devices, e.g., GFCI control circuits.

Are such limiters and control circuits fail-safe devices?

Or, are they “reliable” devices and circuits where their lifetime is expected (proven) to be greater than the host equipment?

Rich

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