The TE Connectivity 4-87977-8 is a 50-position, dual-row receptacle housing from the AMPMODU Mod IV series. It is a free-hanging (in-line) crimp housing that accepts female socket contacts — the contacts themselves are ordered separately.
Mating Header and Compatible Contacts
This receptacle mates with the AMPMODU Mod IV 0.100" x 0.100" dual-row pin headers. The matching crimp socket contacts are from the same series — the standard AMPMODU Mod IV female crimp contact (typically 0.025" square post). Because the contacts are not included with the housing, you will need to order the appropriate socket terminals and a hand or automatic crimp tool for the wire gauge in your harness.
