|For an overview of various models of power armor in the Fallout series of games, see T-51b power armor.|
|The following is based on Fallout Shelter or Fallout Shelter Online and some details might contradict canon.|
The T-51a power armor was developed in the laboratories of the West Tek research facility. At the end of the Anchorage Reclamation in January 2077, the armor had become standard issue for American soldiers in the Army's Mechanized Cavalry Regiments with significant modifications over the earlier model: the T-45d power armor. This armor is a variation of the T-51b power armor. It provides wearers with +3 Strength and +1 Perception.
|T-51a power armor||+3 Strength, +1 Perception||500||legendary|
|T-51d power armor||+3 Strength, +2 Perception||500||legendary|
|T-51f power armor||+4 Strength, +3 Perception||500||legendary|
T-51a power armor (1)