The 140U-J6L3-C50 circuit breaker is an Allen-Bradley molded case circuit breaker. It belongs to the Bulletin 140U series of products and it has a rated operational current of 50 Amps. The breaking capacity or interrupting rating for the 140U- J6L3-C50 circuit breaker is 70 kiloamps at 400 Volts AC and it is 65 kiloamps at 480 Volts AC. The circuit breaker comes with an integrated electronics trip unit of the LS (long time or short time) variant. The 140U-J6L3-C50 circuit breaker is available in a J-Frame enclosure. The maximum current rating of these J-Frame circuit breakers is 250 Amps. The number of poles on the 140U-J6L3-C50 circuit breaker is three. The ultimate breaking capacity rating at 220 or 240 Volts AC is 100 kiloamps while the service breaking capacity is also 100 kiloamps. The ultimate breaking capacity rating at 380 or 415 Volts AC is 70 kiloamps while the service breaking capacity is also 70 kiloamps.

At 500 Volts AC, the ultimate breaking capacity rating is 42 kiloamps while the service breaking capacity is 20 kiloamps. At 690 Volts AC, the ultimate breaking capacity rating is 7 kiloamps while the service breaking capacity is 3 kiloamps. The working ambient temperature range for the 140U-J6L3-C50 circuit breaker is from 16 to 140 degrees Fahrenheit. The approximate weight of the unit is 5.2 kilograms and it measures approximately 7 x 4.13 x 4.05 inches. The standards with which the 140U-J6L3-C50 circuit breaker complies include the IEC 60847-2, CCC, and UL 489 standards. Applications for the 140U-J6L3-C50 circuit breaker include use for both main and branch circuit protection inside enclosures, switchboards, and panelboards. The 140U-J6L3-C50 circuit breaker can provide both overload and short-circuit protection.