This socket appears on the Silicon Labs BRD4180A board and it might be nice to reuse the module on our projects after programming it. The socket appears to have 50-mil spacing between pins. What is it? There are no apparent markings on the plastic itself.


20-pin SMT socket

From datasheet (probably 3d render):

20-pin SMT socket male

  • 1
    \$\begingroup\$ TE 1-534978-5 or similar. The magic words are side coded. \$\endgroup\$
    – Janka
    Commented Jan 22, 2021 at 2:27

1 Answer 1


The key to this lies in the documentation for the BRD4001 'Wireless Starter Kit' which your BRD4180A plugs into - available from SiLabs here.

There you'll find the BOM spreadsheet, which tells you that the daughterboard connectors, P200 & P201, are Samtec Tiger Eye™ TFC-120-02-L-D-A-K-TR - these are the connectors you'll need to use on your own boards to be able to re-use the BRD4180A on them.
enter image description here
The mating connectors on your BRD4180A are probably SFC-120-something.... enter image description here

The WSTK documentation package link is posted in a SiLabs Knowledge-Base article here.

  • \$\begingroup\$ Thanks, what page linked to the schematic package? I looked but perhaps I overlooked it. For anyone else who might stumble upon this, here is the radio board schematic zip: silabs.com/documents/public/schematic-files/… \$\endgroup\$
    – KJ7LNW
    Commented Jan 22, 2021 at 19:59
  • \$\begingroup\$ @KJ7LNW I've edited the link into my answer \$\endgroup\$
    – brhans
    Commented Jan 22, 2021 at 20:02

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