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

CSA, UL

Surface Mount Technology

Surface mount fuses offer considerable space (and time) saving features for low voltage applications. The FF types are ideal for protection of high value silicon IC's e.g. alarm systems, audio/visual equipment, computer boards, portable telephones, power supplies, medical apparatus etc.