Electrical connector and assembly thereof

The invention provides an electrical connector and an assembly thereof. The electrical connector includes a primary body and a number of terminal groups. The primary body includes a periphery wall and a side wall disposed at opposite sides of the primary housing and extending along a longitudinal direction, a slot defined between the periphery wall and the side wall, and a number of passageways extending along a transverse direction for receiving the number of terminal groups. Each terminal group includes a predetermined terminal having a contact section exposed to the slot and a pair of soldering portions respectively extending from opposite sides of the contact section and inserted outwardly from the periphery wall and the side wall. Since the terminal groups are suspened within the passawgeways, the terminal groups have better elasticity. Since each terminal group is provided with three contact points for increasing reliability of electrical connection among terminal groups. Since at least one terminal group is provided with a pair of welding portions, the welding between the terminal groups and the main circuit board is much firmer and the risk of escaping of the electrical connector from the circuit is reduced.