We recommend you use a fuse from Mersen/Ferraz Shawmut for a fast replacement. With time delay fuse speed, 250A fuse amps, an interrupt rating of 200kA at 600VAC, 100kA at 300VDC, and a4by series, this fuse is a must-have. The voltage rating is 600vac/300vdc. It has a dual element. It is a nonindicating fuse. When it comes to product classification, this item can be grouped as L. The body is made of glass/melamine material. Functionally equal to Bussman KLU, Littelfuse KLLU, KLP, KLPC, you'll thoroughly enjoy its use. As far as size goes, it is 2" in diameter. Standards include: UL/CSA. This fuse also meets the following environmental guidelines: RoHS Compliant.