Siemens QF220U Miniature Circuit Breaker 2 Pole

The Siemens QF220U is a two-pole miniature circuit breaker with a 20 A rating designed for 120/240 V AC residential circuits, providing reliable protection for two hot conductors in a single device. As part of Siemens’ US2 family, this 2-pole device is built for plug‑in mounting in compatible Siemens panels and is commonly used in Type QP panel lineups to simplify replacement and ensure consistent protection across multiwire branch circuits. It carries a short‑circuit current rating up to 10 kA at 240 V and is UL-listed under UL 943, aligning with standard safety and performance expectations for branch‑circuit protection in homes and light commercial settings. With its 2‑pole design, both poles are disconnected simultaneously, helping safely isolate circuits during maintenance or fault conditions. Typical applications include protecting lighting and receptacle circuits fed from a shared neutral in single‑phase 120/240 V installations, as long as it is installed in an approved Siemens panelboard suitable for this model.