The 0.156" (3.96mm) pitch is the standard spacing for the MTA-156 family, matching the mating pin header's footprint. The closed end and polarizing key prevent reverse insertion and ensure correct orientation during assembly — a common source of rework in harness builds if omitted.
Termination and Wiring — IDC for Speed, 22 AWG Only
The IDC termination punches through the insulation in one stroke, eliminating individual crimp operations. This works with 22 AWG wire only — the slot geometry is sized for that gauge. The wire type can be discrete or ribbon cable, but the insulation diameter must be compatible with the IDC slot.