According to the Hubbell catalog, specifications for their GFCI Industrial grade receptacle is:
Trip Level 4 to 6 ma
Trip Time 0.025 sec. Nominal
Max. Interrupting Cap. 2000A.
Op. Temp. -30Deg. F to 150Deg F
Max. Humidity 95%
More than you asked for, but important info to know, if needed.
If you buy a GFCI from the local hardware store, then check the box for specifications. If not on the box or the dealer doesn't have a cut sheet, then don't buy it.
