The T-51b Powered Infantry Armor is designed with the latest passive defense features for both civilian and military disturbances. The back-mounted TX-28 MicroFusion Pack generates 60,000 Watts to power the HiFlo hydraulic systems built into the frame of the suit. Made of the latest poly-laminate composite, the T-51b shell is lightweight and capable of absorbing over 2500 Joules of kinetic impact. The 10 micron silver ablative coating can reflect laser and radiation emissions without damage to the composite subsurface.

Power Armor Specs downloaded from Zax in The Glow
PIPBOY.msg
http://www.mediafire.com/file/e1r7ls1m3mmhuxj/PIPBOY.MSG
Full file https://pastebin.com/qHBhVdns

https://fallout.gamepedia.com/Power_armor_specs