guitar chord
C♯sus2
The third replaced by the second. Nothing in it decides between major and minor.
Written the other way round it is D♭sus2 — the same twelve keys on a piano, a different piece of notation.
Every fingering that fits a hand
x46644
moderate · barre
x4112x
hard
x4114x
hard
x4664x
moderate · barre
9666xx
hard
What is true of it
C♯sus2 is C♯, D♯ and G♯ — 1, 2 and 5 counted from C♯.
These are also the notes of G♯sus4/C♯ and A♭sus4/C♯. Which name is right depends on what is underneath and what came before — the notes alone do not decide.
The easiest of the 5 fingerings below is x46644: 3 fingers, one of them barring the 4th fret, held at the 4th fret.
None of them uses an open string, so this chord moves up the neck unchanged — the same shape 1 fret higher is the chord a semitone above.
2 of the 5 need a barre.
1 string stays silent.
Where its notes are on the neck
The brass dots are C♯, the root. Everything else is a chord tone with its degree printed in it.
With a different note underneath
C♯sus2/D♯
x6664x
C♯sus2/G♯
446644
An inversion is the same chord with a different note lowest. The name changes to a slash name because the bass is what a listener hears as the foundation.