Siemens B220 2P 20A Molded Case Circuit Breaker

The Siemens B220 is a 2-pole molded‑case circuit breaker in the BL frame for 120/240 V AC service, rated 20 A with a 10 kA interrupt rating at 240 V. This bolt‑on device is designed for panelboard installations and provides thermal‑magnetic protection with a common trip to ensure both poles disconnect together on a fault. It accepts copper conductors in the 14–10 AWG range and occupies roughly 3 in L × 3 in W × 2 in H, with a 60 Hz operating frequency and an ambient rating up to 40°C. As part of Siemens’ BL lineup, the B220 delivers reliable, code‑compliant branch‑circuit protection for residential or light commercial panels in standard 120/240 V circuits and 2‑pole configurations.