Click here for Wookieepedia's article on the Canon version of this subject.  This article covers the Legends version of this subject. 

OnALegendsArticleGoToCanon

Ablative plating was an enhancement that increased the protection capabilities of armor against many types of damage, particularly from electrical sources. However, the added safegaurd impaired the movement of the wearer to some degree. The Mark I, II, III, & IV versions in turn allowed for a considerable increase in protection without further diminishing movement.

Behind the scenes

In KotOR II, this upgrade can only be used on medium and heavy armor.

Appearances

Sources