0.156" Pitch IDC Receptacle for 20 AWG — MTA-156, 6 Positions
The 0.156" (3.96mm) pitch matches the industry-standard MTA-156 header footprint — the same spacing used across the series for consistent wire-to-board layouts. It accepts 20 AWG wire only, with the insulation-piercing slot sized for that gauge; no separate crimp terminal is needed, so you can build a harness on site with a basic hand tool.
Termination and Wire Fit — IDC for 20 AWG Only
It's designed for 20 AWG wire, either discrete strands or ribbon cable. For field repair, you can re-terminate a fresh wire end with the same IDC tool; no crimp contacts to stock.
Mating and Retention — Locking Ramp, Free Hanging
The receptacle mounts free-hanging (in-line) — no panel cutout or board mount required. It mates with the corresponding MTA-156 header (male pins, 0.156" pitch). To release, press the ramp and pull — the connector comes apart without prying, which matters when you're working in a tight enclosure and don't want to snap the housing latch.
Position Count Comparison — 6 vs 9 vs 5 vs 8
Within the same MTA-156 IDC receptacle family, the 3-640600-6 (6 positions) sits alongside the 3-640600-9 (9 positions) and the 3-640602-5 (5 positions) and 3-640602-8 (8 positions). All share the 0.156" pitch, tin 80.0µin contacts, locking ramp, and IDC termination for 20 AWG (640600 variants) or 24 AWG (640602 variants). The 9-position version gives you three extra circuits in the same housing length increment; the 5- and 8-position versions use 24 AWG wire instead of 20 AWG, so verify your wire gauge before substituting.