Sizing the Fit: Pitch, Positions, and Locking
The 1-640387-1: The friction lock is the key retention feature — it holds the header mated to the matching MTA-156 receptacle under vibration without a separate latch or screw, common in appliance and industrial harness assemblies. The 11-position count is exact for the BOM line; the header is fully loaded across all positions.
The glass-filled thermoplastic insulation provides dimensional stability across the temperature range.
Current Rating and Wire Gauge Dependency
For a given application, the actual ampacity is set by the crimped wire, not the header alone. The 600VAC voltage rating confirms this header can handle line-voltage power distribution, not just low-voltage DC signals.