The Allen-Bradley 140U-KTD3-D40 molded case circuit breaker is part of the 140U MCB product line. The unit has a K Frame with 400 Amps of current rating and it features a trip unit with fixed thermal and adjustable magnetic protection. This three-pole circuit breaker has a current range of 4000 Amps. Some of the features of the K Frame circuit breakers are field-installed internal control modules, molded case switches, rotary operators, and flex cable operators. The 140U-KTD3-D40 molded case circuit breaker also comes with high interrupting ratings in compact dimensions and field-installed or factory-installed accessories. It is globally approved and listed for universal applications around the world. The 140U-KTD3-D40 circuit breaker also comes with an interrupting rating of 35 kiloamps at 600 Volts, 65 kiloamps at 380 to 415 Volts, 13 kiloamps at 690 Volts, and 65 kiloamps at 480 Volts. This circuit breaker also has flex cable operating devices as well as rotary variable-depth operating mechanisms.

The Allen-Bradley 140U-KTD3-D40 molded case circuit breaker is listed and rated for compliance with the UL 489, CE, KEMA-KEUR CSA, and IEC standards. This circuit breaker has a fixed thermal trip adjustment rating of 300 Amps and a magnetic trip adjustment range of 1500 to 3000 Amps. The 140U-KTD3-D40 circuit breaker also has a thermal-magnetic current range of 15 to 800 Amps and a molded case switch current range of 125 to 1200 Amps. It has an electric current range of 70 to 1200 Amps with options including a long time or a short time setting, long time or short time or high instantaneous setting, long time or short time or ground fault setting, and a long time or short time or high instantaneous or ground fault setting.