Overview
The MJD122 is a darlington Transistor made by luJing in a TO-252 package with 3 pins. TO-252 Darlington Transistors ROHS.
PCBKit's library has its KiCad symbol (Transistors:NPN B1 E2 C3, from CERN's library) and its footprint (ICs And Semiconductors SMD:TO228P991X239-3N-R546X521, from CERN's library), ready for a KiCad board. 2,410 are in stock at JLCPCB (part C54426191).
Symbol
Footprint
Parameters
10- Collector - Emitter Voltage VCEO
- 100V
- Current - Collector Cutoff
- 200uA
- Current - Collector(Ic)
- 4A
- DC Current Gain
- 200
- Emitter-Base Voltage VEBO
- 5V
- Pd - Power Dissipation
- 1.25W
- Transition frequency(fT)
- 25MHz
- Type
- NPN
- Vbe On(VBE(on))
- 2.5V
- Vce Saturation(VCE(sat))
- 2V
Order codes
1- MJD122LCSC C54426191
Pinout
3| Pin | Name | Type |
|---|---|---|
| 1 | B | Passive |
| 2 | E | Passive |
| 3 | C | Passive |
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<iframe src="https://pcbkit.io/embed/parts/lujing/MJD122" title="MJD122 in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/lujing/MJD122.jpg" alt="MJD122" width="1200" height="900">[](https://pcbkit.io/parts/lujing/MJD122)Questions
Is there a KiCad symbol and footprint for the MJD122?
Yes. The symbol is Transistors:NPN B1 E2 C3 and the footprint ICs And Semiconductors SMD:TO228P991X239-3N-R546X521, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the MJD122?
TO-252, with 3 pins. Its footprint is drawn on this page.
Where is the MJD122 datasheet?
luJing publishes it: the Datasheet link on this page opens it.
Where can I order the MJD122?
JLCPCB lists it as part C54426191, with 2,410 in stock; the sellers' links on this page open their listings.
What can replace the MJD122?
Parts like it in the library: the MJD122 by DDF, the MJD122 by HUXN and the MJD127 by DDF. Check their datasheets: a part that fits the footprint may still differ in its ratings.
