20-Pin Unshrouded Breakaway Header on 2.54 mm Pitch
The 9-146252-0-10: The gold layer is specified for repeated mating — at 15.0 µin it supports several hundred cycles before exposing the base copper, which matters for test points or modular assemblies where the connector sees periodic reconnection.
Style is listed as Board to Board or Cable — the same pinout works for stacking two PCBs or for terminating a ribbon cable via an IDC socket. Confirm the receptacle part number against your harness assembly.
For applications requiring fewer mating cycles, that part is a cost-down option; for higher cycle life, the 9-146252-0-10 with 15.0 µin gold is the safer choice.
