The 140U-H6C3-C30-B circuit breaker is a fixed thermal/magnetic trip enabled circuit breaker manufactured by Allen-Bradley. It is a molded case circuit breaker with a current rating of 125 Amps. It comes in an H Frame and it supports different interrupt ratings. The trip current rating of the breaker is 30 Amps. It is equipped with a standard busbar mounting base. It is a Series A circuit breaker with a conformally-coated enclosure. The 140U-H6C3-C30-B circuit breaker has a metal frame and a molded insulating material. The insulating material is high-quality material and the breaker lasts for a longer period of time than other breakers. The breaker is equipped with contacts (open and closed) which are used for connecting the circuit with the system. It has a trip unit which automatically responds in case of a thermal overload, short circuit, and ground fault.

The 140U-H6C3-C30-B circuit breaker comes with a voltage rating of 480 Volts AC. It has three poles and it can work with both single-phase and three-phase power supplies. The current rating of the breaker is 30 Amps. The interrupt rating of the circuit breaker is 65 kA at 480 Volts AC. The circuit breaker is used to carry the main load current without excessive heating and it can also withstand the heat that is produced due to the interrupting of the circuit. The environment temperature should be maintained between -25 and 60 degrees Celsius for normal operation. The 140U-H6C3-C30-B circuit breaker should be protected from electrostatic discharges to avoid damage to different components. The circuit breaker functions normally at up to 2000 meters above sea level without losing its performance.