Thermobaric ammunition caliber 40x46mm-extended (TB-2) is used as a part of a 40x46mm under-barrel grenade to defeat enemy manpower on open areas, in fortified structures, buildings as well as armored and lightly armored vehicles.

TB-2 is a solid cylindrical charge with a hole for fuse installation. The charge is installed into the under-barrel grenade during its assembly. The outer surface of the charge is coated with electrically conductive varnish, and the upper end is covered with foil.

When a grenade fuse is triggered, the pressure of the resulting gases leads to the destruction of the charge, scattering particles in the surrounding area. The detonation wave passing through the formed cloud leads to its explosion. The main damaging factors are: the temperature of the explosion cloud, its size and excess pressure in the front of the shock wave.

Features:
TB-2 does not have a central explosive charge.