Glass Fuse - TOOGOO(R) 10Pcs 250V 0.2A 200mA Quick Fast Blow Glass Fuses Tubes 5mm x 20mm Designed with 5 x 20mm glass tube, 0.2A breaking current. A type of low resistance resistor that acts as a sacrificial device to provide overcurrent protection, of either the load or source circuit. With overload and overcurrent protection. Widely used for electric equipment, home applicance, ans so on.