The Allen-Bradley 140U-K6D3-D25 Circuit Breaker is a K-Frame molded case circuit breaker with a rated current of 250 Amps, a supply voltage of 480 Volts, an interrupting rating of 65 kA, and a 3-pole configuration. Overall, it has an Ampere Interrupting Capacity (AIC) rating of 65 kA at 480 Volts. The circuit breaker is factory assembled and contains both left side and right side mounting internal control modules. The left side internal control modules include the Undervoltage Release (UVT) and the Shunt Trip (SNT). The right side mounting internal modules include the Alarm contact (AL), the Auxiliary Contact (AX), and the Auxiliary/ Alarm Contact (AX/AL) combination. Every internal control module has its specified function in the circuit breaker. The Auxiliary Contact electrically shows when the breaker is on or off. The Alarm Contact electrically shows when the breaker is tripped. The combined Auxiliary/ Alarm Contact electrically shows the on and off status and the tripped status of the breaker. The Shunt Trip offers the circuit breaker remote tripping. The Undervoltage Release trips the breaker automatically during a voltage drop to a level between 35 to 70% of the present value.

The Allen-Bradley 140U-K6D3-D25 Molded Case Circuit Breaker provides Fixed Thermal/ Adjustable Magnetic (T/M) protection. It offers circuits with protection against ground faults, overloading, and short circuits. The 140U-K6D3-D25 Molded Case Circuit Breaker that is manufactured by Allen-Bradley/Rockwell Automation has dimensions of 140 x 108.5 x 205 millimeters and a storage temperature range from -40 to 80 degrees Celsius (-40 to 176 degrees Fahrenheit). It has a maximum ambient operating temperature rating of 40 degrees Celsius (104 degrees Fahrenheit) without derating.