Connector assembly

A connector assembly having a longitudinal direction and a width direction that is perpendicular to the longitudinal direction, the connector assembly comprising:

• a first connector comprising a plurality of first contacts, a first housing holding the plurality of first contacts, and a first auxiliary fitting attached to the first housing, the first connector being mountable on a first circuit board;
• and
• a second connector comprising a plurality of second contacts, a second housing holding the plurality of second contacts, and a second auxiliary fitting attached to the second housing, the second connector being mountable on a second circuit board, wherein
• the first connector is mated with the second connector to bring each first contact into electrical contact with each second contact,
• the first auxiliary fitting includes a first side-surface facing portion facing a side surface of the first housing in the width direction,
• the first side-surface facing portion includes:
• a first electrical connecting portion configured to come into contact with the second auxiliary fitting and to form an electrical connection with the second auxiliary fitting;
• and
• a first mating lock portion that cooperates with the second auxiliary fitting to prevent a mating state between the first connector and the second connector from being released,
• the first electrical connecting portion and the first mating lock portion are, in a direction parallel to a first connector mounting surface of the first circuit board, adjacent to each other with a gap opened toward the first connector mounting surface of the first circuit board interposed therebetween, and
• the first mating lock portion is provided with a soldering portion solderable to the first connector mounting surface of the first circuit board.