The 140U-Q6S3-D60-A switch is a molded case switch or isolator. It is manufactured by Allen-Bradley and it is a device that belongs to the Bulletin 140U product line which also include circuit breakers. Specifications for the 140U-Q6S3-D60-A switch include 3 poles, 60 to 69 kiloamps of breaking capacity, one auxiliary contact, 600 Amps of rated current, and compatibility with the Q frame size. The magnetic trip threshold for the 140U-Q6S3-D60-A switch is 6000 Amps. The specifications for the breaking capacity at 60 Hertz frequency are 35 kiloamps at 600 Volts AC, 65 kiloamps at 480 Volts AC, and 100 kiloamps at 240 Volts AC. The specifications for the ultimate breaking capacity at 50 Hertz frequency are 13 kiloamps at 690 Volts AC, 38 kiloamps at 500 Volts AC, 70 kiloamps at 380 to 415 Volts AC, and 100 kiloamps at 220 to 240 Volts AC.

The specifications for the service breaking capacity at 50 Hertz frequency are 25 kiloamps at 690 Volts AC, 50 kiloamps a 500 Volts AC, 70 kiloamps at 380 to 415 Volts AC, and 100 kiloamps at 220 to 240 Volts AC. The terminal box lugs for the 140U-Q6S3-D60-A switch need to be ordered separately from Allen-Bradley. The 140U-Q6S3-D60-A switch is approved by the KEMA–KEUR, CE, CSA 22.2, and UL 489 standards. The Allen-Bradley molded case switches which belong to the Bulletin 140U family support current ratings from 125 to 1200 Amps. Several accessories are available for the 140U-Q6S3-D60-A switch which can be installed at the factory and which can also be installed in the field. All installation and service-related activities on the 140U-Q6S3-D60-A switch should be performed by trained and experienced technicians.