
Light controller 2.0
crisfajardo/Bike-Light-Controller
A prototype to create a smart bike from a conventional one.

The BD440 is a bipolar made by Jiangsu Changjing Electronics Technology (CJ) in a TO-126 package with 3 pins. -55℃~+150℃ 1 PNP 1.25W 100uA 3MHz 475 4A 5V 60V 800mV PNP TO-126 Bipolar (BJT) ROHS.
PCBKit's library has its KiCad symbol (Transistor_BJT:BD440, from KiCad's library) and its footprint (Package_TO_SOT_THT:TO-126-3_Vertical, from KiCad's library), ready for a KiCad board. JLCPCB lists it (part C2992035). 1 open-source board in 1 repository on GitHub use it.
| Pin | Name | Type |
|---|---|---|
| 1 | E | Passive |
| 2 | C | Passive |
| 3 | B | Input |

crisfajardo/Bike-Light-Controller
A prototype to create a smart bike from a conventional one.
<iframe src="https://pcbkit.io/embed/parts/cj/BD440" title="BD440 in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/cj/BD440.jpg" alt="BD440" width="1200" height="900">[](https://pcbkit.io/parts/cj/BD440)Yes. The symbol is Transistor_BJT:BD440 and the footprint Package_TO_SOT_THT:TO-126-3_Vertical, both drawn on this page. PCBKit places them on a board for you when you design with it.
TO-126, with 3 pins. Its footprint is drawn on this page.
Jiangsu Changjing Electronics Technology (CJ) publishes it: the Datasheet link on this page opens it.
JLCPCB lists it as part C2992035, with 0 in stock; the sellers' links on this page open their listings.
Parts like it in the library: the BD434 by LGE, the BD441 by onsemi, the BD438 by STMicroelectronics and the BD437 by YFW. 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.