Normally you can find that info in the manufacturers catalog. For example heres a sheet from G-E's BuyLog:
Cartridge Fuse, Type TH Switches
—Designed for applications where safety, high performance
and continuity of service are required.
—UL Listed. Products in this section have been tested by UL and
shown to meet the construction and performance requirements
of UL Standard Number 98, Enclosed and Dead Front Switches.
—Meet Federal Specification WS-865C for heavy duty switches.
—Meet major automotive manufacturer’s and JIC electrical
—Meet NEMA Enclosed Safety Switch Standard KS1 for Type HD.
—Full cover interlocks.
—60°C and 75°C conductor ratings.
—Quick-make, quick-break mechanisms.
—Suitable for use as service entrance equipment when installed
in accordance with the National Electrical Code.
—UL Listed ratings for fusible switches when used with
—Class H (10,000 rms amps, sym IC). Standard on 30-600 amps.
—Class L (100,000 rms amps, sym IC). Only applicable when
used with 800 and 1200 amp Type TC Safety Switches (e.g.
—Class J (200,000 rms amps, sym IC). See page 2-28 for field
—Class R (200,000 rms amps, sym IC). Order appropriate
Class R fusing kit from page 2-28.
—Safety switch product numbers with suffix “SS” are grade
304 stainless steel. Product numbers with suffix “SS316”
are grade 316 stainless steel.
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