BOJACK 5x20mm 4A 4amp 250V 0.2x0.78 Inch F4AL250V Fast-Blow Glass Fuses (Pack of 20)

BOJACK 20 Pcs High Quality Fast-blow Glass Fuse Fuse Dimension:5x20mm Fuse Current: 4A Fuse Voltage: 250V The role of the fuse：When a circuit malfunctions or is abnormal, the current is constantly rising, and the increased current may damage some important components or valuable components in the circuit, or it may burn the circuit or even cause a fire.The fuse will cut off the current when the current abnormally rises to a certain height and a certain time, thereby protecting the safe operation of the circuit.