C Frame circuit breakers are characterized by the rectangular raised area at the base of the toggle and fit in a rectangular shaped cutout. They are larger than the A Frame Breakers and have much more substantial studs for attaching wires to, meaning they can easily accept wires up to 6 awg or larger. They come in larger amperages up to 100 Amps. These breakers are an industry standard size and Blue Sea Systems breakers, which are manufactured by Carling, are interchangeable with other similar brands. The Blue Sea range all have white toggles with one exception. These breakers are suitable for AC or DC and have higher DC voltage ratings than their A frame equivalents. C Frame circuit breakers come in single, double and triple pole configurations.