US Patent 11665857 Heat sink assembly for an electrical connector assembly

A receptacle assembly includes a heat sink assembly for a receptacle cage for dissipating heat from a pluggable module plugged into the receptacle cage. The heat sink assembly includes fin plates and spacer plates arranged in a plate stack independently movable for engaging and conforming to the pluggable module. Each spacer plate includes a thermal interface at a bottom of the spacer plate engaging the pluggable module. Each fin plate includes a thermal interface at a bottom of the fin plate engaging the pluggable module. The fin plates include branched fin plates and unbranched fin plates. Each of the unbranched fin plates are planar between the bottom and the distal end thereof. Each of the branched fin plates are non-planar and include at least one bend between the bottom and the distal end thereof.