Connector Pitch Explained: How to Measure It and Why It Matters
Pitch is the single most-quoted number on a connector datasheet, and also one of the easiest to measure incorrectly -- a small mistake here does not just cause a fit problem, it can mean the connector is physically incompatible with your PCB footprint from the start.
What Pitch Actually Measures
Pitch is the center-to-center distance between adjacent contacts, not the gap between them and not the overall connector width divided by the pin count. It is usually specified in millimeters (common values include 1.0, 1.25, 2.0, 2.54, and 4.2mm for wire-to-board series) and must match your PCB pad layout exactly, not just approximately.
Why Small Pitch Differences Cause Big Problems
A connector with 2.0mm pitch will not mate reliably with a footprint designed for 2.54mm pitch, even though the difference looks small on paper -- the contacts simply will not land on the pads correctly. Because many series share similar overall housing dimensions across different pitches, pitch is also one of the easiest specs to misread when comparing datasheets quickly.
Checking Pitch Before You Commit
Always confirm pitch against the connector's own datasheet dimension drawing, not just the summary table, and cross-check it against your PCB pad layout before finalizing either design. If you are replacing an existing connector, measure the actual physical part rather than relying on a part number lookup, since running changes sometimes shift specs within the same family name.
Pitch mismatches are entirely preventable with a five-minute check against the dimension drawing, yet they remain one of the most common reasons a "compatible-looking" connector turns out not to fit.
You May Also Need
Wire-to-Board Power Connectors
Standard-pitch wire-to-board power connector series spanning 2.54mm to 4.2mm pitches, widely used for power connections in consumer electronics and industrial equipment.
Micro Wire-to-Board Connectors
Ultra-fine-pitch (1.25mm and below) wire-to-board connectors for internal connections in space-constrained small electronic devices.
For detailed datasheets or cross-reference comparisons for this series, please contact our technical team.