COOPER BUSSMANN BBS-20 Fuse, 20A, Nonindicating, BBS, 48VAC. More details: Fuse, 20 Fuse Amps, Nonindicating, BBS Series, 48VAC Voltage Rating, Single Element, Body Material Fiberglass, Nonrejection, Body Style Cylindrical, Interrupt Rating 10kA at 48VAC, Length 1-3/8 In., Diameter 13/32 In., Functionally Equal To Ferraz Shawmut SBS, Standards CE, UL Guide JDYX/CSA Certification Class 1422-01