A product of Allen-Bradley, the 140U-D6D2-C12 circuit breaker is a 140U MCB series circuit breaker designed and built to provide space-saving benefits. The 140U-D6D2-C12 circuit breaker and the other Allen-Bradley circuit breakers under the same series provide the users with up to 50% size reduction compared to the traditional molded case circuit breakers. The 140U-D6D2-C12 circuit breaker comes with dimensions of 45 x 102 x 85 millimeters. The 140U MCB series circuit breakers by Allen-Bradley feature a high interrupting rating of 65 kA, allowing for a higher overall panel short circuit rating. The Allen-Bradley molded case circuit breaker provides the users with up to 6 times the high interrupting rating in comparison to the conventional molded case circuit breakers.

The 140U-D6D2-C12 circuit breaker is a UL 489 compliant circuit breaker. This means that it is suitable for global applications. The Allen-Bradley circuit breakers are suitable for use in feeder and control circuits. For the feeder circuits, the 140U-D6D2-C12 circuit breaker works in small cabinets, distribution panels, branch circuits, transformers, and heaters. For the control circuits, the unit works with control transformers and power supplies. The 140U-D6D2-C12 circuit breaker comes with the Auxiliary Contact (AX) that indicates the electrical ON and OFF statuses of the breaker. This ensures easy monitoring of the circuit breaker. When the 140U-D6D2-C12 circuit breaker is tripped, the built-in alarm contact (AL) will show the status of the unit. This molded case circuit breaker features an ambient operating temperature range of -25 to 60 degrees Celsius. The ambient storage temperature range is -40 to 80 degrees Celsius, while the unit features resistance to shock and resistance to vibration.