CA1-B0-34-630-121-D is a C-Series hydraulic-magnetic circuit breaker designed for overcurrent protection in electrical systems. This single-pole unit features a 30-ampere current rating and is rated for maximum application voltage of 120/240 VAC, with UL 489 listing and CSA certification for reliable performance. The breaker employs a unique arc chute design enabling interrupting capacities up to 10,000 amps, combined with thermoset glass-filled polyester construction for enhanced mechanical and electrical strength. It incorporates wiping contacts with mechanical linkage and two-step actuation providing high positive contact pressure and extended contact life. The CA1-B0-34-630-121-D is ideal for applications requiring compact, high-performance overcurrent protection in industrial control panels, power distribution systems, and equipment requiring UL/CSA-certified protection.