The power armor is protected by its own energy shield, a combination between a electro-magnetic field and a forcefield, which is capable of deflecting or negating all manners of physical or energy attacks. While powerful the shield can be temporarily deactivated with multiple attacks of some power, or one powerful attack. It takes around eleven seconds for the shields to return to their full strength. The shields can withstand up to a 1.1 kiloton explosion, equivalent to 6.35968 terrajoules. The power armor is as such very well protected from most mecha based or conventional ground based power armor. The shield is on as a default, a conformal shield which stays an inch away from the surface from the armor and is invisible until impacted upon. The shield plays an important role in flight where it extends to make the armor perfectly aero-dynamic and thus greatly reducing the amount of energy needed to accelerate.
See Damage Rating (Version 3) for an explanation of the damage system.