Product Description: The Siemens B320HH00S01 is a Molded Case Circuit Breaker from the BL Series family. It features a 3-pole design with a 240V, 20A rating and a 65kA@240V AIC rating. This breaker uses a bolt-on connection and includes thermal magnetic protection. It is compatible with Siemens P1 panelboards and comes with a 120V shunt trip.