Littelfuse 4A FF Surface Mount Fuse, 125V ac/dc

Littelfuse 154 series OMNI-BLOK fuse and holder combinations offer a convenient solution for efficient installation and easy replacement of miniature Littelfuse NANO² surface mount fuses. The 154 series fuse and holder combination can be installed on a PC board in a single, quick, efficient step and further fuse replacement can be accomplished without exposing the PC board to the detrimental effects of solder heat. Littelfuse 154 series OMNI-BLOK's are suitable for a wide variety of applications.

Easy fuse replacement
Miniature size
Very Fast-Acting and Time-Lag options available
Holder sized to fit a range of NANO² fuses
Low fuse temperature de-rating
Heat-resistant fuseholder
260°C reflow capable fuseholder

CSA, UL

UL; CSA

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.