Littelfuse 01220088H is a 122 Series cartridge fuse clip rated 30A at 250V, through hole mount with PC pin termination, designed for 1/4" diameter fuses.
The Littelfuse L60030M2SQ is a POWR-GARD Midget Fuse Block designed for 600V AC/DC and 30A applications. It features a Class CC rating and screw/quick connect termination.
This Littelfuse 01250003H is a cartridge fuse clip rated for 30A and 250V. It features a through hole mounting style with PC pin termination and is designed for use with 13/32" diameter fuses.