This 1 pole bolt-in disconnect fuse base is rated 30A 600V max and will accept 15A through 30A Bussmann TM brand type TCF Class CF plug-in limiter fuses 200KAIC. FUSE NOT INCLUDED and are sold separately. To select the appropriate plug-in fuse see the Class CF section found under the FUSES & ACCESSORIES main tab on this website. 1 fuse is required