The TE Connectivity 3-643819-5 is a 5-position MTA-156 receptacle with a 0.156" (3.96mm) pitch, designed for IDC termination to discrete or ribbon cable. It accepts 22 AWG wire and terminates via insulation displacement, so no crimp tool is needed for the wire — just a simple IDC press.
The 0.156" pitch is the spacing between contact centers — it determines the board footprint and the ribbon cable pitch. At 5 positions, this receptacle matches a 5-circuit BOM line exactly.
How It Compares: MTA-156 vs MTA-100
The MTA-156 series uses a 0.156" (3.96mm) pitch, while the MTA-100 series uses a 0.100" (2.54mm) pitch. The wider pitch of the MTA-156 allows for higher current capacity per contact and easier routing for larger wire gauges like 22 AWG. For a 5-position connector, the MTA-156 occupies more board space than an equivalent MTA-100 part, but the trade-off is a more robust connection for power or signal lines where voltage drop matters.