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Selecting a commercial-grade part for equipment mounted outdoors is unwise because

  • A.the specification does not extend below freezing
  • B.the package is not sealed against moisture ingress
  • C.the flash endurance falls sharply at low temperature
  • D.the part will not be available for as many years

Answer: A

Nothing is guaranteed below zero degrees, and while many parts work colder, nothing obliges any particular unit to. Sealing is a matter for the enclosure, and endurance and longevity are separate concerns from the temperature grade.

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