This is my first time working with FFC/FPC. I'm looking for a FFC/FPC connector to match this Micro SD card extender, just like shown on the PCB.

According to the dimensions diagram the pitch seems to be 1 mm and FPC thickness is 0.33 mm. But according to the schematic the connector's seems to be 0.5 mm pitch.

I have also asked the manufacturer of this extender what connector they use and they've sent me the datasheet (mechanical drawing). Unfortunately the drawing is mostly in Chinese. I have uploaded the datasheet here.

As shown in the connector's datasheet, the pitch is 0.5 mm, and it's meant for a FFC thickness of 0.3 mm (and not 0.33 mm).

All of this got me confused as how to choose a matching connector. Is the FFC thickness critical ? Why do they use a 0.3 mm connector with an FFC 0.33 mm thick ?

I've been looking for the connector on digikey, it seems that I need a 0.3 - 0.33 mm FFC thickness connector, contacts on the bottom, 10 positions, 0.5 mm pitch, preferably with a "flip lock" mechanism. One of the parameters on digikey is the "Cable End Type" which can be either "Tabbed, Tapered" or "Straight, Tapered" - What does this parameter mean ? And which one do I need ?

Link to digikey filtered search.


1 Answer 1


The information you've been given is definitely inconsistent.

That said, 0.5mm pitch seems the most likely candidate as it: a) matches the stated pitch in the schematic b) dimension D in the data sheet for the 10 way connector is 5.5mm which is what it says for the loom width in the manufacturer's diagram

The tolerance on the FPC width is +/- 0.05mm so any receptacle between 0.3mmm and 0.33mm should be fine

Your loom appears to be straight (no rounded corners)

Something like this should do: http://www.digikey.com/product-detail/en/molex-llc/0528921095/WM9203CT-ND/1089660

You should really get some samples before going too far into design/manufacturing.

  • \$\begingroup\$ Could you please elaborate about "Your loom appears to be straight (no rounded corners)" ? \$\endgroup\$
    – Mike
    Jul 31, 2016 at 6:29
  • 1
    \$\begingroup\$ A 'tapered' loom has round corners on the connector edge, a 'straight' loom has 90 degree corners. If you look at page 2 of the data sheet for the connector I linked to, you can see it will actually take both style looms. \$\endgroup\$
    – Tom Pope
    Aug 4, 2016 at 8:53

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