The 140U-M6S3-D80 switch is an M-frame molded case switch (isolator). The 140U-M6S3-D80 switch is a Bulletin 140U device that has three poles with an 8000 Amps magnetic trip setting and 800 Amps of rated continuous current. The maximum switching frequency is 60 operations/hour. The power dissipation of the 140U-M6S3-D80 switch is 270 Watts. The recommended temperature range for operation is 16 to 140 degrees Fahrenheit. The mechanical specifications include 19.9 kilograms of weight and switch dimensions of 406 x 210 x 103 millimeters. The Bulletin 140U series of products also includes circuit breakers with either electronic or magnetic trip modules. The ultimate breaking capacity specifications for the 140U-M6S3-D80 switch at 50 Hertz are as follows: 100 kiloamps at 240 Volts AC, 70 kiloamps at 415 Volts AC, 70 kiloamps at 500 Volts AC, and 25 kiloamps at 690 Volts AC. The specifications for the interrupting capacity at 60 Hertz are as follows: 35 kiloamps at 600 Volts AC, 65 kiloamps at 480 Volts AC, and 100 kiloamps at 480 Volts AC.

Accessories for the Allen-Bradley 140U-M6S3-D80 switch can be ordered as factory-installed features and they can also be ordered separately and installed in the field. Features of the Bulletin 140U devices like this switch include high interrupting ratings and flex cable operating mechanisms. The 140U-M6S3-D80 switch is approved by the CE, CSA, and UL standards, and the 140U-M6S3-D80 switch also complies with multiple other standards, including the UL 489, IEC, and CSA 22.2 standards. The power to the electrical system that uses the 140U-M6S3-D80 switch as a component should be disconnected before anyone is allowed to perform service or maintenance on the switch or other parts of the system.