The 140U-JTD3-D10 circuit breaker is a molded case circuit breaker that has been designed and distributed by Allen-Bradley/Rockwell Automation. This breaker belongs to the J frame product line of the 140U circuit breaker series, it comes with a current rating that goes from 50 to 250 Amps and it comes with feeders and disconnects. This specific circuit breaker model comes with three poles that are in charge of stopping the current flow into different devices once a fault condition has been detected. The Allen-Bradley/Rockwell Automation 140U-JTD3-D10 molded case circuit breaker operates with an AC voltage rating of 690 Volts AC at a frequency of 50 Hertz. The detection type for this breaker is the fixed thermal and adjustable magnetic detection. The breaker includes auxiliary and alarm contacts.

The Allen-Bradley/Rockwell Automation 140U-JTD3-D10 molded case circuit breaker has an approximate weight of 5.2 kilograms and a height, width, and depth of 7, 13, and 4,05 millimeters, respectively. It is a compact breaker that occupies less space than other circuitprotection devices. It can be located as a single breaker or in a series with other identical breakers to provide the highest level of protection to a machine. The breaker can operate at its full capacity at a maximum ambient air temperature of 40 degrees Celsius and this operating capacity decreases to 80% with a maximum ambient temperature of up to 70 degrees Celsius. There is a list of accessories that can enhance the efficiency of the breaker. The Allen-Bradley/Rockwell Automation 140U-JTD3-D10 molded case circuit breaker needs to be connected by using wiring that can operate efficiently at temperatures higher than 70 degrees Celsius to ensure safety during operations.