87977-3 is a single-row receptacle housing assembly part of the AMPMODU Interconnection System Mod IV series, featuring a 10-position configuration with 0.100 inch [2.54 mm] centerline spacing and dual-entry, end-stackable design. The housing is constructed from glass-filled thermoplastic material rated 94V-0, with black coloring and low-profile geometry optimized for compact board layouts. Key dimensions include an overall length of 0.500 inches [12.70 mm] (dimension A) and 0.200 inches [5.08 mm] (dimension B), with a tine spacing of 0.200 inches [5.08 mm]. The receptacle features dual cantilever contact beams with built-in anti-overstress protection and accommodates 0.025 inch square or round posts with a contact current rating of 3 amperes and maximum termination resistance of 12 milliohms for beryllium copper contacts. This assembly is RoHS compliant and widely used in wire-to-board interconnection applications requiring reliable, stackable connections in space-constrained environments.