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Unified Daughterboard (UDB) C3/C4/C5


USB-C daughterboard with ESD protection for use with keyboard PCBs

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Unified Daughterboard C3/C4/C5

USB-C daughterboard with ESD protection as used by many keyboard PCBs including Bakeneko60/65, J-02, Atlas and many others.

Designed by ai03 and contributors (GitHub project)


  • USB-C socket
  • ESD protection
  • Gold-plated (ENIG) finish, black solder mask
  • UDB C5 JSH (and the previous version UDB C3) use a 4-pin cable with JST-SH connectors on both ends (3 lengths available)
  • UDB C4 uses a new Molex PicoEZmate connector (not compatible with the JST cable)

Warning: The connector on the UDB C4 is quite fragile – take care when unclipping the cable and try to support the connector to avoid pulling it off the PCB.

Weight 0.01 kg

C3, C4, C5 JSH


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