Abstract: An electrical connector system with a discriminating latching feature comprising a first electrical connector having female contacts and a first latching member, a second electrical connector having male contacts and a second latching member, a third electrical connector having female contacts and a third latching member, and a fourth electrical connector having male contacts and a fourth latching member. The second and fourth connectors may be plugged into either of the first and third connectors so that respective male and female contact make electrical contact with one another. The latching members are cooperable with one another to latch together the first and second connectors to one another when plugged together, to latch the first and fourth connectors to one another when plugged together, to latch the second and third connectors to one another when plugged together, but not to latch the third and fourth connectors to one another when plugged together.