PLCC Socket for 20-Pin Packages — 0.050" Pitch, Closed Frame
The 3-822516-3: This is a PLCC socket from TE Connectivity, designed to accept a 20-pin PLCC package in a 4x5 grid. The 0.050" (1.27mm) pitch matches the standard JEDEC PLCC footprint, so the board layout follows the usual pad pattern for this package type. The closed-frame design surrounds the contact area, providing mechanical protection during handling and insertion. Tin at this thickness is adequate for a moderate number of insertion cycles — think prototype work or production programming sockets — but not for high-cycle or corrosive environments where gold would be specified.
For buyers needing this exact order code, the only path is through independent surplus or aftermarket channels. The lot condition and date code vary, so each quote is specific to the available inventory.
This socket mates with any 20-pin PLCC package that follows the JEDEC MO-047 or MO-052 outline. The 0.050" (1.27mm) pitch between pins is standard, and the 4x5 grid means the package has four pins on each of two sides and five on the other two — verify your PLCC's pinout matches this arrangement before committing. Termination is surface-mount solder. The closed frame does not have alignment posts or board locks, so the socket relies on the solder pads alone for shear strength — ensure the PCB footprint includes adequate solder fillets.