The 8428-21B1-RK-TP is a 28-way surface mount Chip Carrier Socket with tin-plated copper contacts, compatible with automated loading equipment. This 8400 series socket is glass filled polyphenylene sulfide (PPS) insulated, accepts chip carriers conforming to JEDEC outline MO-047 for square and MO-052 for rectangular, open top design allows unrestricted air flow. High temperature insulator compatible with IR reflow and wave soldering.