The Siemens JJ63B350 is a three-pole molded case circuit breaker rated 350 A at 600 V with a 25 kA interrupting capacity at that voltage. It protects three-phase circuits from overload and short-circuit conditions in commercial and industrial power distribution equipment. The JJ frame design mounts in Siemens panelboards and switchboards that accept this series, providing a compact solution for main or branch circuit protection where 600 V class equipment is required.
