IPC Definitions - January 01, 2012
H01R 12/51 - Definition
This group covers:
Fixed connection of which one party is a rigid printed circuit board.
Fixed connection for members (e.g. connectors) to rigid printed circuit board by other structures than terminals (e.g. housing) that are not covered by H01R 12/52-H01R 12/58.
Special rules of classification
Those characterized by the terminals are classified in H01R 12/55-H01R 12/58.