The CA1-B0-34-450-121-D is a C-Series hydraulic-magnetic circuit breaker designed for overcurrent protection. This single-pole breaker features a series trip (current) circuit with a 5.0A rating and a medium time delay characteristic suitable for both DC and 50/60Hz systems. It is configured with a handle actuator, 10-32 stud terminals for secure connections, and is designed for panel mounting using a 6-32 threaded insert. The device is constructed without an auxiliary switch, simplifying its integration, and its robust design with VDE, UL, and CSA approvals makes it ideal for applications in telecommunications, marine, and renewable energy systems.