A heavy current mini connector. The connector has a power terminal assembly and a holder. The power terminal assembly includes a set of resilient contacting tabs. The power terminal assembly and a busbar conductive plate are inserted into each other. The power terminal assembly is conductively connected with a PCB and covered on its outer side with the holder made from steel. The set of resilient contacting tabs is located at the front portion of the power terminal assembly and in contact with the busbar conductive plate. The clamping plates, fastened to the base and provided in the front of the holder, are clamped to the two sides of the power terminal assembly. The base is located on the rear of the holder and is clamped onto the outside of the rear part of the power terminal assembly. The ventilation apertures are situated on the middle of the base.