Circuit breakers are electric switches that protect an electrical circuit or electrical distribution systems from damage caused by overload, abnormal voltage fluctuation or short circuit. These devices are used to detect malfunction and interruption in current flow. The Brazilian market for circuit breakers by voltage level is segmented into low voltage, medium voltage and high voltage. By arch quenching media, the circuit breakers market is bifurcated into air, vacuum, SF6, and others (CO2, DCB, and oil). Circuit breakers are used in construction, automotive, industrial, oil and gas, power generation industries and others (healthcare, mining and food & beverages). Manufacturers of circuit breakers are significantly investing in research and development activities for innovation in latest technologies.