20-Position C-Grid III Receptacle Housing, 0.100" Pitch
The Molex 0901230120 is a 20-position, single-row receptacle housing from the C-Grid III 90123 series. A polarizing key on the housing prevents mis-mating with unkeyed headers in multi-connector harness assemblies.
Contacts Not Included — Plan the Full BOM
The listing note states Contacts Not Included. This housing accepts the standard C-Grid III crimp socket terminals (female contacts), which are ordered under a separate part number. The 20 positions mean 20 individual contacts plus the housing for a complete wire-to-board interconnect. Factor the terminal quantity into the BOM — the housing alone is an empty shell.
The free-hanging (in-line) mounting style suits wire harness assemblies where the connector floats rather than being board-mounted. The polarizing key ensures correct orientation during assembly.