
Sc64v2
Polprzewodnikowy/SummerCart64
SummerCart64 - a fully open source N64 flashcart

The B3FS-1050 is a tactile Switche made by Omron with 4 pins. -25℃~+70℃ 1N 24V 50mA 6.3mm 6mm 7.3mm Gull Wing No Round Button SPST-NO Surface Mount,Vertical - Tactile Switches ROHS.
PCBKit's library has its footprint (EasyEDA_Cloud:KEY-SMD_4P-L6.0-W6.3-P4.50-LS8.0, from EasyEDA), ready for a KiCad board. 10 are in stock at JLCPCB (part C5594007). 3 open-source boards in 3 repositories on GitHub use it.
The library has no symbol for this part yet.
<iframe src="https://pcbkit.io/embed/parts/omron/B3FS-1050" title="B3FS-1050 in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/omron/B3FS-1050.jpg" alt="B3FS-1050" width="1200" height="900">[](https://pcbkit.io/parts/omron/B3FS-1050)Yes. the footprint EasyEDA_Cloud:KEY-SMD_4P-L6.0-W6.3-P4.50-LS8.0, both drawn on this page. PCBKit places them on a board for you when you design with it.
Omron publishes it: the Datasheet link on this page opens it.
JLCPCB lists it as part C5594007, with 10 in stock; the sellers' links on this page open their listings.
Parts like it in the library: the B3FS-1000P by Omron, the B3FS-1052P by Omron, the B3FS-1010P by Omron and the B3FS-1002 by Omron. Check their datasheets: a part that fits the footprint may still differ in its ratings.
3 boards in 3 repositories on GitHub; the most starred are listed on this page, with their KiCad files.