The 140U-D6D3-B30 circuit breaker is a product of Allen-Bradley and it is classified under the 140U MCB series of molded case circuit breakers. The 140U-D6D3-B30 circuit breaker is used in industrial control and panel applications for providing overcurrent protection. This molded case circuit breaker features a supply voltage of 480 Volts and it comes with a frequency rating of 60 Hertz. The Allen-Bradley 140U MCB circuit breaker does not require current limiting. The 140U-D6D3-B30 circuit breaker features 3-pole configuration and it comes with a rated current of 3 Amps. The circuit breaker features an interrupt rating of 100 kA and it comes with the D Frame type. It has a small footprint for conserving up to 50% more space than other circuit breakers.

The Allen-Bradley 140U-D6D3-B30 molded case circuit breaker also comes with a high interrupting rating and it has a 100% rating in terms of performance. The Allen-Bradley molded case circuit breakers feature the magnetic or thermal trip currents.  The magnetic or thermal trip currents may be fixed or adjustable, and they must be sized according to the NEC/CEC rules. Most commonly, the Allen-Bradley circuit breakers like this one can be used as either feeder breakers or as single circuit breakers where disconnection, short-circuit, and thermal protection is required. The 140U-D6D3-B30 circuit breaker comes with the auxiliary contacts that perform the function of the electrically signaling the circuit breaker’s operating status. The status of the 140U-D6D3-B30 molded case circuit breaker is monitored by observing the position of the auxiliary contacts. The position will be indicated as ON or OFF.