Schneider Electric QOB1201021 Circuit Breaker

The Schneider Electric QOB1201021 is a single-pole miniature circuit breaker (MCB) rated for 20 A and designed for 120/240 V AC panelboard installation to protect branch circuits from overloads and short circuits. It uses a thermal-magnetic trip mechanism and provides typical 10 kA interrupting capacity at 120/240 V AC, with UL 489 and CSA certification for residential, commercial, and light industrial panelboards. This Square D device is intended for branch-circuit over-current protection in lighting circuits, receptacle feeds, HVAC units, and small equipment loads, fitting in distribution boards and load centers where reliable fault interruption is essential. Common replacements include the Square D QO120EPD 20 A, Schneider Electric QOB12020, and Eaton BR120 20 A.