26-01-3114 規格の詳細解説：ピッチ、マウントおよびピンアサインについて
The 26-01-3114 is a precision-engineered dual-row, right-angle through-hole PCB header. Recognized by its 4.2 mm (0.165 in) pitch, this component is a staple in industrial power and signal distribution. Mismatches in mounting or pin mapping are leading causes of board re-spins; this technical breakdown ensures your layout is accurate from the first iteration.
| Parameter | Specification | Impact on Design |
|---|---|---|
| In-Row Pitch | 4.2 mm (0.165") | Determines grid and pad spacing |
| Mounting Style | Right-Angle T/H | Dictates edge clearance and keepouts |
| Row Configuration | Dual-Row Offset | Affects trace routing complexity |
| Tail Length | Short Profile | Requires precise drill/plating tolerances |
1 — Mechanical Specs: Pitch and Dimensions
The 4.2 mm pitch refers to the center-to-center distance between adjacent pins in a single row. For the 26-01-3114, designers must account for both the in-row pitch and the row-to-row spacing, which are independent datums in most professional datasheets. A placement tolerance of ±0.1 mm is standard for automated assembly.
2 — Mounting & PCB Footprint Guide
Reliable through-hole joints depend on the relationship between the pin tail and the plated through-hole (PTH). For the 26-01-3114, use a drill size that provides a nominal +0.20 mm clearance. Annular rings should be sized to accommodate the current load while maintaining a minimum of 0.25 mm width to prevent breakout during thermal cycling.
3 — Pinout & Electrical Considerations
Dual-row right-angle headers follow a specific numbering sequence. It is critical to pair the top-down PCB view with the schematic symbol. Document the orientation of the "Pin 1" indicator on the silkscreen. Electrical limits, such as the current rating per circuit and contact plating (typically Tin or Gold flash), must be cross-referenced with your trace width calculations to avoid overheating.
4 — Assembly & Troubleshooting
| Issue | Cause | Fix |
|---|---|---|
| Mating Failure | Wrong row spacing | Correct land pattern offset |
| Weak Solder Joint | Short tail insertion | Adjust wave profile / Hole size |
| Housing Tilt | Missing locator pegs | Verify peg-to-hole alignment |
How should designers verify the 26-01-3114 pitch and row spacing?
Cross-reference the datasheet mechanical drawing with a 4.2 mm in-row pitch and implement in CAD with ±0.1 mm placement tolerance before running DRC against mechanical keepouts.
What drill and pad sizes are recommended for right-angle tails?
Use a drill equal to the nominal tail diameter plus 0.15–0.25 mm. Ensure annular rings are at least 0.25 mm. Use thermal reliefs for wave soldering to prevent cold joints.
Which BOM fields prevent incorrect substitutions for headers?
Specify the exact part number, 4.2 mm pitch, right-angle mounting, tail length, and plating material. Mention "with pegs" if mechanical alignment features are required.
What are common assembly failures for 26-01-3114?
Failures include misaligned pads preventing insertion, insufficient fillets on short tails, and interference with adjacent tall components due to the right-angle body overhang.
