Connector, connector assembly and device

A connector disclosed by the present invention can be installed on a first surface of a circuit board, comprises a bottom shell facing the circuit board, a top shell located above the bottom shell and a separation part located between the bottom shell and the top shell, and also comprises a radiator arranged on the bottom shell. An opening penetrating the circuit board of the radiator is protruded out from a second surface relative to the first surface of the circuit board. According to the present invention, the radiator is arranged on the bottom shell directly without needing to be fixed by a clamp, thereby reducing the cost. Moreover, a heat radiation effect is improved without the blocking of the clamp. In addition, the present invention discloses a radiating path independent of the top shell, and the radiating path is established between the bottom shell of the connector and a device shell, thereby providing an additional and effective radiating path for the connector, and improving the heat radiation effect of the connector.