Abstract: An electrical connector, electrical connector assembly, electrical device and electrical interconnection system configured for use in electronic devices with direct connect orthogonal architectures. The electrical connector comprises: an insulating housing; at least one electrically conductive terminal, with at least a part of each of the at least one electrically conductive terminal being accommodated in the insulating housing; and a mounting flange, the mounting flange having a mounting hole for mounting the electrical connector to component PCB. A threaded connecting member may pass through the mounting hole and be connected to a first PCB. A portion of the mating interface part of the connector may extend below the mounting interface of the connector so as to abut an edge of the PCB. The electrical connector can simultaneously provide compactness and robustness.