The Voltage Rating shall be the maximum direct current (dc) or alternating current (ac) root mean square (rms) voltage for which a fuse is designed.  The voltage rating is identified by a numerical value followed by the letter "V".

The Current Rating ist the amount of current a fuse will carry indefinitely without interruption.  The current rating in amperes and fractions of an ampere is identified by a numerical value followed by the letter "A".
Fuses rated below 1 A use fractions to represent the current rating in the part number (ex.:  "1/8A" or "3/4A").  In general, fuses rated above 1 A which are not integers use decimals for the current rating in the part number (ex.:  "1.5A" or "2.5A").  However, MIL-PRF-23419/4 (FM04) still uses the fractional representation for parts rated above 1 A (ex.:  "1-1/2A").  See the parts listings herein for specific part number formats.