Buss Small Dimension Fuse,PK100, 0.25 A, 250V AC, Not Rated, Nonindicating, Fast Acting, Body Style Cylindrical, Interrupt Rating 35 A at 250V AC, Fuse Size 20.00 mm L x 5.00 mm dia, Length 20 mm, Diameter 5 mm, Equivalent Brand and Series Bussmann S500, Equivalent Series 217, GDB, GSB, S500, Body Material Ceramic, Compatible Fuse Block Series 1A3399, H15, HHT, HTB, HTC-15M, Cap Diameter 5 1/5 in