Sus chords are neither major or minor!
There are 4 types of basic chords: Major, Minor, Suspended, and Augmented.
Major chords have a major third between the bottom two notes and a minor third between the top two.
Minor chords are the opposite: minor third on the bottom, major third on the top.
Suspended chords have *only* minor thirds both on top and the bottom.
Augmented chords have *only* major thirds both on top and the bottom.