CA3-B0-26-450-321-E is a C-Series hydraulic-magnetic circuit breaker featuring a flat rocker actuator with standard rocker bezel and white color finish. This single-pole breaker is rated for 20 amps at 120/240 VAC with UL 489 listing and CSA certification, providing reliable protection in compact applications. 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 features wiping contacts with mechanical linkage and two-step actuation that deliver high positive contact pressure and extended contact life. The unit is equipped with threaded insert mounting (6-32 x 0.195 inches) and is ideal for applications requiring higher amperage handling in space-constrained environments such as industrial control panels and power distribution systems.