
TelemetryOnboard
Spaceflight-Rocketry-Giessen-e-V/Telemetry
Open-Source Rocket Telemetry System Based On Radiocrafts RC232 Radio Modules

The MMBT4401-TP is a bipolar made by Micro Commercial Components in a SOT-23 package with 3 pins. -55℃~+150℃ 1 NPN 100 100nA 250MHz 350mW 40V 600mA 6V 750mV 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. 6,011 are in stock at JLCPCB (part C78718). 1 open-source board in 1 repository on GitHub use it.
| Pin | Name | Type |
|---|---|---|
| 1 | B | Input |
| 2 | E | Passive |
| 3 | C | Passive |

Spaceflight-Rocketry-Giessen-e-V/Telemetry
Open-Source Rocket Telemetry System Based On Radiocrafts RC232 Radio Modules
<iframe src="https://pcbkit.io/embed/parts/mcc/MMBT4401-TP" title="MMBT4401-TP in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/mcc/MMBT4401-TP.jpg" alt="MMBT4401-TP" width="1200" height="900">[](https://pcbkit.io/parts/mcc/MMBT4401-TP)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.
Micro Commercial Components publishes it: the Datasheet link on this page opens it.
JLCPCB lists it as part C78718, with 6,011 in stock; the sellers' links on this page open their listings.
Parts like it in the library: the MMBT2907ALT1G by onsemi, the MMBT2222A by STMicroelectronics, the 2N5551S-RTK/P by KEC Semicon and the MMBT8050D by STMicroelectronics. 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.