These C frame flat rocker circuit breakers are a larger size than the A Frame ones and have more robust 1/4" terminal studs to accept larger wires. They come in a more extensive range up to 100 Amps and are suitable for AC and DC circuits. They come in single, double and triple pole configurations.These C Frame breakers are ignition protected but the A Frame ones are not. These breakers are used in the Blue Sea Systems Surface Mount Systems panel enclosures and as AC Main breakers in some 360 Series panels, they are also used in the Battery Management Panels