440 Series 1206 High I2t Fuse Littelfuse 440 Series 1206 High I2t Fuse is a 100% RoHS Compliant, lead-free, and halogen-free fuse series designed specifically to provide over-current protection to circuits that operate under high working ambient temperatures of up to 150°C and high inrush currents capable of avoiding nuisance fuse openings. This high I2t fuse series ensures excellent temperature stability and performance reliability. Littelfuse 440 Series 1206 High I2t Fuse applications include LCD displays, servers, notebook computers, printers, scanners, data modems, and hard disk drives.