
LogicBoard 3GE
tullulah/VectrexPCBRepro
OpenHardware project to reproduce the original PCB of the Vectrex (3GE Revision)

The FMMT491TC is a bipolar made by Diodes Incorporated in a SOT-23 package with 3 pins. -55℃~+150℃ 1 NPN 100nA 150MHz 160mV 1A 500mW 60V 7V 80 NPN SOT-23 Bipolar (BJT) ROHS.
PCBKit's library has its KiCad symbol (Pinmap_Generic:Q_NPN_1B_2E_3C, from PCBKit's generic symbols) and its footprint (Package_TO_SOT_SMD:SOT-23, from KiCad's library), ready for a KiCad board. 538 are in stock at JLCPCB (part C508218). 1 open-source board in 1 repository on GitHub use it.
| Pin | Name | Type |
|---|---|---|
| 1 | B | Input |
| 2 | E | Passive |
| 3 | C | Passive |

tullulah/VectrexPCBRepro
OpenHardware project to reproduce the original PCB of the Vectrex (3GE Revision)
<iframe src="https://pcbkit.io/embed/parts/diodes/FMMT491TC" title="FMMT491TC in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/diodes/FMMT491TC.jpg" alt="FMMT491TC" width="1200" height="900">[](https://pcbkit.io/parts/diodes/FMMT491TC)Yes. The symbol is Pinmap_Generic:Q_NPN_1B_2E_3C and the footprint Package_TO_SOT_SMD:SOT-23, both drawn on this page. PCBKit places them on a board for you when you design with it.
SOT-23, with 3 pins. Its footprint is drawn on this page.
Diodes Incorporated publishes it: the Datasheet link on this page opens it.
JLCPCB lists it as part C508218, with 538 in stock; the sellers' links on this page open their listings.
Parts like it in the library: the 8550M-D by Foshan Blue Rocket Elec, the SS8550 by MSKSEMI, the PBSS4160T by Nexperia and the S8550 2TY-TD(0.35) by TDSEMIC. Check their datasheets: a part that fits the footprint may still differ in its ratings.
1 board in 1 repository on GitHub; the most starred are listed on this page, with their KiCad files.