Bussmann NOS Series Bussmann NOS basic protection general purpose, non-current-limiting, one-time fuses. Protect lighting, heating, and other circuits not subject to temporary surges and where available short-circuit currents are relatively low. Other Names: NOS40, NOS 40 Amp, NOS-40, NOS 40A, NOS40A, NOS-40A, NOS 40 Product specifications Ampere 40 A Voltage rating 600 VAC Interrupt rating 50 kA Speed Medium / Normal Blow Class Class K5 and H Fuse Shape Cartridge Fuses Approvals CE, UL, CSA Substitute parts Littelfuse NLS, Mersen OTS Datasheet Bussmann NOS Datasheet Dimensions 1.06" Dia x 5.5" L (26.92x139.7mm) Item weight 3.68 oz Other names NOS40, NOS 40 Amp, NOS-40, NOS 40A, NOS40A, NOS-40A, NOS 40 WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.