Radial Leaded DIP Overload Temperature Fusing Protect Square Fuses 145deg C 250V 2A
Please see photo for more detail and size
The case is Plastic insulating :
The contact point is a low melting point ally:
The whole unit is sealed by a special resin:
Body Size: Max 6.1mm X 6.26mm X 2.54mm all size are the MAXIMUM.