QO single pole circuit breaker for QO load centers. Plug-on type, 1 space required. 120/240V AC only. UL listed. No. QO115: 15A No. QO120: 20A No. QO130: 30A No. QO115C: 15A, carded No. QO120C: 20A, carded No. QO130C: 30A, carded