The CF1-G3-U-40-1 C Series breakers incorporate the benefits of hydraulic-magnetic technology in a familiar molded case design. The C Series is popular in outdoor locations, in either high temperature or low temperature environments where nuisance tripping might have been a problem in the past. The C Series is built for a wide range of applications, and is one of the most versatile designs. From heating and air conditioning to modern railcars, the C Series breaker is built for the most demanding industrial applications.