| 摘要 |
An electrical connector assembly comprises a receptacle connector (100) and a plug connector (200) mating with the receptacle connector. The receptacle connector (100) has a receptacle housing (10) and a plurality of receptacle contacts (12) received in the receptacle housing, and the receptacle housing comprises a base portion (102) and an expansion portion (104) extending outwards from the base portion. The plug connector comprises a plug housing (20) and a plurality of plug contacts (21) retained in the plug housing. Each of the receptacle contacts and the plug contacts define a mating portion (121, 211), a retention portion (123, 213) retained with associated housing and a tail portion (124, 214) extending beyond the associated housing. The receptacle contacts and the plug contacts are divided into two groups respectively, each group of contacts comprises two pairs of differential signal contacts (12a, 12b, 12d, 12e, 21a, 21b, 21d, 21e) transmitting signal and a grounding contact (12c, 21c) arranged between the two pairs of differential signal contacts, and one of the two pairs of the differential signal contacts (12d, 12e, 21d, 21e) are located on an outer side of the group of contacts.
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