Mersen OT Series Series Ferraz Shawmut is Mersen. Mersen OT One-Time general purpose fuses provide low cost protection for feeder and branch-circuits serving lighting, heating, and other non-motor loads. OT fuses will safely interrupt available short-circuit currents up to 50,000 amperes in all ratings. Other Names: OT75, OT 75 Amp, OT-75, OT 75A, OT75A, OT-75A, OT 75 Product specifications Ampere 75 A Voltage rating 250 Vac, 250 Vdc Interrupt rating 50 kA Speed Fast-Acting Class Class K5 Shape Cartridge Blade Fuses Approvals UL, CSA, RoHS Substitute parts Bussmann NON Datasheet Mersen OT Datasheet Dimensions 1.06" Dia x 5.88" L (26.92x149.35mm) Item weight 4.16 oz Other names OT75, OT 75 Amp, OT-75, OT 75A, OT75A, OT-75A, OT 75 WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.