4 layers110 × 70 mm

The JR500 is a trimmers, Variable Capacitor made by Knowles with 2 pins.
PCBKit's library has its KiCad symbol (Device:C, from KiCad's library), ready for a KiCad board. JLCPCB lists it (part C20342595). 1 open-source board in 1 repository on GitHub use it.
The library has no footprint for this part yet.
| Pin | Name | Type |
|---|---|---|
| 1 | — | Passive |
| 2 | — | Passive |

Yes. The symbol is Device:C, both drawn on this page. PCBKit places them on a board for you when you design with it.
Knowles publishes it: the Datasheet link on this page opens it.
JLCPCB lists it as part C20342595, with 0 in stock; the sellers' links on this page open their listings.
1 board in 1 repository on GitHub; the most starred are listed on this page, with their KiCad files.