A fuse from Mersen/Ferraz Shawmut is the most essential fuse for both commercial and industrial needs. With very fast acting fuse speed, 40A fuse amps, an interrupt rating of 200kA at 600VAC, 100kA at 300VDC, and a6t series, this fuse is a must-have. Functionally equal to Bussmann JJS, Littelfuse JLLS, you'll thoroughly enjoy its use. It has a single element. It is a nonindicating fuse. When it comes to product classification, this item can be grouped as T. The voltage rating is 600vac/300vdc. The body is made of glass/melamine material. As far as size goes, it is 13/16\ in diameter. Standards include: UL/CSA. This fuse also meets the following environmental guidelines: RoHS Compliant."