CA3-B0-34-615-121-D is a hydraulic-magnetic circuit breaker from Carling Technologies' C-Series product line. This circuit breaker is designed for applications requiring higher amperage and voltage handling capability in a smaller package, with the series offering configurations from 1-6 poles and 0.02-100 amps. The C-Series features a unique arc chute design enabling interrupting capacities up to 10,000 amps, along with thermoset glass filled polyester half shell construction for increased mechanical and electrical strength. The design incorporates wiping contacts with mechanical linkage and two-step actuation for high contact pressure and longer contact life. Common applications include industrial equipment, power distribution systems, and other scenarios requiring reliable overcurrent protection with optional mid-trip handle for visual indication of electrical overload.