Electrical connector comprising a detection device for detecting potential overheating, which comprises an electrically conductive element and an electrically insulating element inserted between the electrically conductive element and a low-voltage line. The electrically conductive element exerts an elastic force on the insulating element. For example, the electrically conductive element is a spring. In the event of overheating, the insulating element deforms under the pressure of the electrically conductive element and enables an electrical connection between two low-voltage lines. The overheating is detected as a consequence of the electrical design of this connection between the low-voltage lines.