You know you have chosen the right electronic fuse when you choose a fuse from Mersen/Ferraz Shawmut. With time delay fuse speed, 1-6/10A fuse amps, an interrupt rating of 200kA at 250VAC, 100kA at 250VDC, and a2d-r series, this fuse is a must-have. When it comes to product classification, this item can be grouped as RK1. The body is made of polyester material. The voltage rating is 250vac/dc. Functionally equal to Bussmann LPN-RK-SPI, Littelfuse LLNRK-ID, you'll thoroughly enjoy its use. As far as size goes, it is 9/16" in diameter. It has a dual element. It is a nonindicating fuse. Standards include: UL 248-12 File E2137, DC UL 248, CSA C22.2 No. 248.12. This fuse also meets the following environmental guidelines: RoHS Compliant.