The 140U-L6X3 Breaker Frame is a compact molded frame from Allen-Bradley/Rockwell Automation. It belongs to the bulletin 140U MCCB accessories product line. Its frame ratings are Size L, 3 poles, and 600 Amps. The maximum ambient temperature of the frame is 40 degrees Celsius. The 140U-L6X3 Breaker Frame has a simple structure that does not require heavy maintenance or inspections. It ensures the high electrical and mechanical life of the circuit breaker that it is framing. Its modular design employs installation flexibility with a wide variety of operators. The 140U-L6X3 Breaker Frame comes with a range of terminal accessories that accommodate easy, quick, and safe wiring. Its molded case has the strength to withstand heat and arcs. The frame acts as the body of the breaker with an insulated housing.

The physical design of the 140U-L6X3 Breaker Frame provides greater flexibility and efficiency to industrial panel boards to optimize electrical distribution systems. The frame size indicates the highest-rated current that the MCCB can hold. It also employs a molded case switch. The approximate dimensions of the frame are 10.33 x 5.48 x 5.43 inches. It has phase barriers as accessories to ensure the correct dielectric separation of the terminal. During installation, some cushioning or protective material can be used to reduce the effects of vibration. The safety features of the breaker ensure that the live parts are not exposed. Install the breaker in a dry, dust-free, non-corrosive environment where it will not be subjected to shocks or vibrations. During assembly and installation, make sure that the internal accessories are securely mounted in the circuit breaker.