Suspended triads on guitar
Root position suspended triads
The suspended triad has three intervals: the root or 1, 4, and 5. Each triad is identified by the root note (red diamond).
The first inversion brings the root to the top. Therefore, the order of notes is 4, 5, R (low to high).
The second inversion brings the fourth to the top. Therefore, the order of notes is 5, R, 4 (low to high).