The fuse of general household appliances can use about 3 amps, and the fusing current of the fuse is usually 1.5-2.0 times the rated current.
The working principle of AC contactor is to use electromagnetic force combined with spring force to make and break contacts. AC contactor has two working states, namely, power-off state (release state) and power-on state (action state). When the attracting coil is energized, the static iron core generates electromagnetic attraction, the armature is attracted, and the connecting rod connected with the armature drives the contact to act.