Siemens BDQ220 2 Pole Molded Case Circuit Breaker

Siemens BQD220 two-pole molded-case circuit breaker delivers reliable overcurrent protection for 277/480 VAC mains and 125/250 VDC control circuits, rated at 20 A with a 14 kA interrupt capacity. This thermal-magnetic MCCB from the BQD family is designed for bolt-on mounting (low-tab variants available) in panelboards and enclosures, providing protection for two conductors. Intended for 60 Hz systems in commercial and light-industrial environments, the BQD220 is commonly used to protect feeders to motors, transformers, and control gear, or as a replacement in Siemens panels where a 20 A MCCB is required. The device combines overload protection with high-speed short-circuit interruption and is built to withstand frequent switching and fault events in daily operation, with a rugged molded-case construction and compatibility with low-profile termination options. In typical distribution schemes, it handles 277/480 VAC service with DC control voltages, ensuring consistent performance across a range of industrial applications and allowing integration with Siemens' BQD lineup for easy expansion or retrofit.