Littelfuse 407 Series is a 100% Lead-free, RoHS compliant and Halogen-free fuse designed specifically to provide overcurrent protection to circuits that operate under high working ambient temperatures up to 150º C and high in-rush currents. The general design ensures excellent temperature stability and performance reliability. This high I2t time lag fuse is designed to have ultra-high in-rush current withstand capability to avoid nuisance fuse open.