
Tube Driver
median-dispersion/GMT-Geiger-Counter
Geiger-Müller tube based Geiger counter.

The STN2580 is a bipolar made by STMicroelectronics in a SOT-223 package with 4 pins. -65℃~+150℃ 1 NPN 1.6W 10uA 1A 1V 400V 60 9V NPN SOT-223 Bipolar (BJT) ROHS.
PCBKit's library has its KiCad symbol (Pinmap_Generic:Q_NPN_1B_2C_3E_4C, from PCBKit's generic symbols) and its footprint (Package_TO_SOT_SMD:SOT-223, from KiCad's library), ready for a KiCad board. JLCPCB lists it (part C2875894). 2 open-source boards in 2 repositories on GitHub use it.
| Pin | Name | Type |
|---|---|---|
| 1 | B | Input |
| 2 | C | Passive |
| 3 | E | Passive |
| 4 | C | Passive |

median-dispersion/GMT-Geiger-Counter
Geiger-Müller tube based Geiger counter.

sanketh0103/5V_SMPS-with-Timer
240V - 5V SMPS 1A Power supply, it has a relay that can be used to control mains powered devices. This PCB can also act as a timed switch.
<iframe src="https://pcbkit.io/embed/parts/st/STN2580" title="STN2580 in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/st/STN2580.jpg" alt="STN2580" width="1200" height="900">[](https://pcbkit.io/parts/st/STN2580)Yes. The symbol is Pinmap_Generic:Q_NPN_1B_2C_3E_4C and the footprint Package_TO_SOT_SMD:SOT-223, both drawn on this page. PCBKit places them on a board for you when you design with it.
SOT-223, with 4 pins. Its footprint is drawn on this page.
STMicroelectronics publishes it: the Datasheet link on this page opens it.
JLCPCB lists it as part C2875894, with 0 in stock; the sellers' links on this page open their listings.
Parts like it in the library: the PBSS4350Z by Nexperia, the 2STN1550 by STMicroelectronics, the NSS60600MZ4 by onsemi and the FZT857TA by Diodes Incorporated. Check their datasheets: a part that fits the footprint may still differ in its ratings.
2 boards in 2 repositories on GitHub; the most starred are listed on this page, with their KiCad files.