The 140G-K6F3-D30 circuit breaker is a 140G series molded case circuit breaker manufactured by Eaton Culter-Hammer. It operates on 600 Volts AC and it has a K frame type, with a current rating of 400 Amps. This circuit breaker also features an interrupting rating of 65 kA, 3 poles, adjust thermal and adjust magnetic trip unit protection, and an adjustable thermal trip option. Like all the 140G series molded case circuit breakers, the 140G-K6F3-D30 circuit breaker features a current range of 10 to 3000 Amps, space-saving size, thermal and magnetic protection ratings of 15 to 800 Amps, and electronic protection of 10 to 3000 Amps. The 140G molded case circuit breakers are suitable for the line protection of the control panels.

The 140G-K6F3-D30 circuit breaker is globally accepted and it meets the UL, CCC, and CSA standards as well as IEC performance interrupting and breaking capacity standards. It has many options for mounting and many field-installed and factory-installed accessories. This circuit breaker provides high interrupting and breaking capabilities and it is commonly used either as a single circuit breaker or as a feeder breaker where the functions of short-circuit, disconnection, and thermal protection are needed. Some of the factors that must be considered during the selection of molded case circuit breakers such as the 140G-K6F3-D30 circuit breaker are the application voltage rating, short-circuit current, and the wiring or the load current rating that requires protection. Also, it is essential to follow all of the local code requirements because all these elements might affect the functionality of the selected molded case circuit breaker that is selected.