5 each: ATO 3A Fuses;ATO fuses are standard size and the most common type for automotive and marine applications, but can be used in other circuit protection applications;ATO fuses are often mounted in a fuse block, fuse holder or panel;Applications include: cars, marine, trucks, bus/RV, emergency vehicles, tractors, powersport, sump pumps, RC cars, Segways, mobility scooters, fleet vehicles, construction equipment;Features Littelfuse's standard color coding to indicate amp rating