1.27 mm IDC Socket, 2.54 mm Row Spacing | LUONYX

This is a 1.27 mm pitch IDC socket for 0.635 mm flat ribbon cable. Contacts sit 1.27 mm apart along each row and the two rows are 2.54 mm apart. That matches the usual 2.54 mm board grid. The HFC family runs from 10 to 100 positions, all in the same three-piece housing.

Glass-filled PBT body, UL 94 V-0, with brass contacts plated gold over nickel. Most of these go into industrial PCs, PLC racks, servo drives and test fixtures, where a ribbon has to reach a board and the harness is put together by hand.

Key features

• Three separate mouldings make up one socket: the contact body, a middle cover that carries the ribbon, and a strain relief cover (SR) fitted once the cable is folded back.
• 1.27 mm contact pitch, 2.54 mm between rows. Takes UL2678 30 AWG ribbon on a 0.635 mm pitch and mates with a conventional 2.54 mm board layout.
• Twelve sizes from one series: 10, 14, 16, 20, 26, 30, 34, 40, 50, 60, 68 and 100 positions.
• 0.5 A per contact. 500 V AC for one minute, 500 MΩ min insulation resistance, 20 mΩ max contact resistance, -40 °C to +105 °C.

How to assemble a 1.27 mm IDC socket

Lay the ribbon flat on the middle cover with conductor 1 at the end marked with a triangle on the housing. Conductor 1 is normally the red-marked edge of the cable. Press the cover down until both latches click. Fold the ribbon back over the socket and fit the SR. That fold takes the strain, so a tug on the cable does not work the contacts loose.

No soldering is involved. One pass in a simple bench jig presses every pin at once, on a small batch or a full production run.

Applications

These show up mainly inside industrial PCs and single-board computers, PLC and I/O racks, servo drives and test fixtures. They suit boards laid out on a 2.54 mm grid, and the SR helps where a harness gets handled or pulled during service.

Bench power supplies and small-batch test rigs are another common one.

Outline dimensions, tolerances and the full drawing are available on request.

FAQ (questions fréquentes)

Which ribbon cable fits this socket?

UL2678, 30 AWG, 0.635 mm conductor pitch. If you are using another ribbon, send us the cable spec and we will check it against the drawing before quoting.

Are all twelve sizes from one series?

Yes. The HFC series covers 10, 14, 16, 20, 26, 30, 34, 40, 50, 60, 68 and 100 positions in the same three-piece housing.

Can you supply the terminated cable assembly?

Yes. We build IDC ribbon assemblies with this socket on one or both ends, to a drawing or a sample. The sockets come from an affiliated IDC socket manufacturer.