The TE Connectivity 2057855-1 is a QSFP+ cage with an integrated heat sink, designed as the board-mount receptacle for a QSFP+ pluggable transceiver module. The cage provides the mechanical retention and EMI containment for the module, while the heat sink draws thermal energy off the top of the transceiver can. This is the port-side interconnect in a 40 GbE or 4x10 GbE data path — the cage sits at the board edge, the transceiver plugs in from the panel face, and the host board routes the high-speed differential pairs to the cage's press-fit tails.
Press-Fit Termination and Right-Angle Mounting
Termination is press-fit — the compliant pin tails are pressed into plated through-holes on the host PCB, no solder required.
EMI Shielding and Thermal Management
The cage is EMI shielded — the stamped metal shell grounds to the chassis through the panel opening, containing radiated emissions from the transceiver.