
Hot plate controller
rohamid/Hot-plate-controller-master
STM32 based hot plate PCB soldering controller

The MJD122T4 is a darlington Transistor made by STMicroelectronics in a TO-252-2(DPAK) package with 3 pins. 1000 100V 10uA 2.8V 20W 4.5V 4V 5V 8A NPN TO-252-2(DPAK) Darlington Transistors ROHS.
PCBKit's library has its KiCad symbol (EasyEDA_Pro:MJD122T4, from EasyEDA Pro) and its footprint (Package_TO_SOT_SMD:TO-252-2, from KiCad's library), ready for a KiCad board. 3,070 are in stock at JLCPCB (part C138774). 1 open-source board in 1 repository on GitHub use it.
| Pin | Name | Type |
|---|---|---|
| 1 | B | Unspecified |
| 2 | C | Unspecified |
| 3 | E | Unspecified |

rohamid/Hot-plate-controller-master
STM32 based hot plate PCB soldering controller
<iframe src="https://pcbkit.io/embed/parts/st/MJD122T4" title="MJD122T4 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/MJD122T4.jpg" alt="MJD122T4" width="1200" height="900">[](https://pcbkit.io/parts/st/MJD122T4)Yes. The symbol is EasyEDA_Pro:MJD122T4 and the footprint Package_TO_SOT_SMD:TO-252-2, both drawn on this page. PCBKit places them on a board for you when you design with it.
TO-252-2(DPAK), with 3 pins. Its footprint is drawn on this page.
STMicroelectronics publishes it: the Datasheet link on this page opens it.
JLCPCB lists it as part C138774, with 3,070 in stock; the sellers' links on this page open their listings.
Parts like it in the library: the MJD127T4 by STMicroelectronics, the KSH127TF by onsemi and the MJD122TF by onsemi. 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.