CBB capacitors include a wide range of types, but not only start capacitors, or running capacitors. Starting capacitors refer to AC electrolytic capacitors or polypropylene and polyester capacitors used to start single-phase asynchronous motors. What does the running capacitor do? In fact, in simple terms, this is to ensure that the capacitor can work properly. For the start capacitor, it can be simply understood as a starting role, in the case of normal operation after the start, the start capacitor will stop working, and the running capacitor to maintain the normal operation of the device.
CBB is the running capacitor, CD is the starting capacitor, generally marked outside the capacitor.