Littelfuse 449 Series NANO2 Surface Mount Fuses Littelfuse 449 series of NANO² surface mount fuses feature an enhanced inrush withstand characteristic that helps solve the problem of nuisance 'opening' by accommodating inrush currents that normally cause a fast-acting fuse to open. The 449 series of NANO² surface mount fuses are suitable for a wide range of applications. Time-lag
Small size
Low temperature de-rating