A low - voltage circuit breaker is one which is suited for circuits rated at 600 volts or lower . One of the most commonly used low-voltage air circuit breakers is the molded case circuit breaker. Specifications: Brand: Chint Protection: Thermo-Magnetic Voltage Rating: 690V Rated Current: 25-50A Ambient Temperature: -5-+40 ℃ Package Includes: 1 x  Chint NM8-125S/125/3 Low Voltage Circuit Breaker