CCMR

`Space savings - No other fuse class approved
  for branch-circuit protection has a 600 volt rating and 300,000
  A.I.R. in a package this small.
`Extremely current-limiting - Reduces damage caused
  by heating and magnetic effects of short-circuit currents -stops
  damaging short- circuit currents faster than any mechanical protective device.
`Excellent time delay - Eliminates needless downtime
  caused by power surges or equipment demands . . .
  permits selection of fuse sizes closer to actual load conditions - provides better protection.
`300kA Interrupting Rating - Littelfuse self-certified to
  300,000 amperes as standard. Meets future trend towards
  higher available short circuit currents.