What the 4.20mm Pitch and Locking Ramp Mean for Your Build
The 10127820-1822LF: At this pitch, the 600VAC/DC rating is achievable because the wider spacing reduces creepage risk compared to finer-pitch connectors. The locking ramp fastening type keeps the header mated to the receptacle under vibration — a practical requirement for wire-to-board power connections in equipment that sees movement or shock. With 18 positions loaded in a 2-row layout, the dual-row arrangement keeps the connector width manageable while delivering the circuit count needed for multi-wire power distribution.
Plating and Housing: What the Specs Tell a Harness Builder
For a connector that gets mated a few times over its service life, this plating grade is more than adequate.
RoHS compliance is confirmed, so it meets the European restriction on hazardous substances for electronic equipment.
How This Header Compares to the 16-Position Sibling
The closest functional alternative within the same base product number is the 10127820-1622LF, which shares the same 4.20mm pitch, 2-row layout, shrouding, locking ramp, tin plating, and UL94 V-0 rating — the only difference is 16 positions instead of 18. If your BOM calls for 18 circuits, this 18-position version is the correct fit. The 16-position sibling saves two positions but requires a board layout change and a different receptacle housing.