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)

Features:

• 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.