Board Fit and Circuit Count
The 4-102977-0-19: The 2.54mm row spacing matches common prototyping grids and ribbon-cable IDC receptacles.
The base product number is 102977; the -19 suffix indicates a specific plating and post-length variant. No direct pin-compatible replacement is listed, so confirm the 0.318" (8.08mm) mating length and 0.125" (3.18mm) post length match your board stack-up before substituting.
