The most effecitve measure against small-arms plasma fire, often implemented as a form of smoke grenade. Plasma chaff renders incoming light charges harmless through two means - heat dissipation and forced ionic bonding. Most chaff rounds release two compounds upon activation (though expensive versions achieve both effects with a single substance): the first is a substance of high thermal conductivity that saps the intense heat of plasma charges as they enter the chaff. The second is an ionised gas, the particles of which the plasma ions bond with to return to a non-electromagnetically-charged state.

The smoke grenade is the most common form of plasma chaff because it can be activated while attached to a person, or lobbed to offer protection to a crucial asset. As an abbreviation of plasma chaff, and thanks to the onomotopoeia of the grenade's initial activation, these items have come be effectionally known as 'paff' grenades.

Because of the scale of plasma rounds directed against larger targets such as buildings or large vehicles, plasma chaff is an ineffective defence mechanism against such attacks.