The 140U-J2D3-D22 Molded Case Circuit Breaker (MCCB) is a high-performance compact circuit breaker from Allen-Bradley/Rockwell Automation. It has a size J frame, 3 poles, and 250 Amps of rated frame current. The rated operational voltage of the circuit breaker is 400 to 480 Volts AC and the current rating is 225 Amps. It comes with 25 Kiloamps of interrupting rating and 11.4 pounds of approximate shipping weight. This circuit breaker is designed to open a circuit automatically on a predetermined overcurrent setting without injuring the circuit breaker itself. For that to function properly, it must be properly applied within its rating. The 140U-J2D3-D22 Molded Case Circuit Breaker has a high interrupting rating that is the maximum interrupting level of fault current that the circuit breaker can safely interrupt without damaging the breaker itself.

The 140U-J2D3-D22 Molded Case Circuit Breaker can be used for a wide range of voltages and frequencies with its adjustable trip settings. Its trip mechanism provides protection and isolation to the circuit. When selecting the MCCB, the application voltage, the current rating of the load to be protected, and the available short circuit current need to be taken into consideration. Large differences in the ambient temperature level can affect the operation of this magnetic thermal circuit breaker. During installation, make sure to mount the circuit breaker in a clean and dry environment. The housing of the contact structure is contained within a molded based that is finished with a molded lid. Its compact design and internal accessories that can be field-fitted make installations and configuration easy. The 140U-J2D3-D22 Molded Case Circuit Breaker is suitable to use in applications where the load to be expected to change.