Voltage: 250 v
Current: 5 A
Typical cold resistance (Ω): 0.021
Dimensions: 5 x 20 mm (each)

It is a fast-acting 5*20mm 250V 5A Glass Tube Fuse .

Features:
Fast-acting, low breaking capacity
Optional axial leads available
5 x 20mm physical size
Glass tube, silver-plated (63mA-315mA) and nickel-plated (500mA-15A) brass endcap construction
Designed to UL/CSA 248-14
Package Includes:
1 x 5*20mm 250V 5A Glass Tube Fuse