
Overview
The BU406 is a bipolar made by Jiangsu Changjing Electronics Technology (CJ) in a TO-220-3L package with 3 pins. -55℃~+150℃ 1 NPN 10MHz 1V 200V 2W 50 5uA 6V 7A NPN TO-220-3L Bipolar (BJT) ROHS.
PCBKit's library has its KiCad symbol (Pinmap_Generic:Q_NPN_1B_2C_3E, from PCBKit's generic symbols) and its footprint (Package_TO_SOT_THT:TO-220-3_Vertical, from KiCad's library), ready for a KiCad board. 554 are in stock at JLCPCB (part C81221).
Symbol
Footprint
Parameters
12- Collector - Emitter Voltage VCEO
- 200V
- Current - Collector Cutoff
- 5uA
- Current - Collector(Ic)
- 7A
- DC Current Gain
- 50
- DC Current Gain (hFE@Ic,Vce)
- 50@1A,5V
- Emitter-Base Voltage(Vebo)
- 6V
- Number
- 1 NPN
- Operating Temperature
- -55℃~+150℃
- Pd - Power Dissipation
- 2W
- Transition frequency(fT)
- 10MHz
- Vce Saturation(VCE(sat))
- 1V
- type
- NPN
Order codes
1- BU406LCSC C81221
Pinout
3| Pin | Name | Type |
|---|---|---|
| 1 | B | Input |
| 2 | C | Passive |
| 3 | E | Passive |
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<iframe src="https://pcbkit.io/embed/parts/cj/BU406" title="BU406 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/BU406.jpg" alt="BU406" width="1200" height="900">[](https://pcbkit.io/parts/cj/BU406)Questions
Is there a KiCad symbol and footprint for the BU406?
Yes. The symbol is Pinmap_Generic:Q_NPN_1B_2C_3E and the footprint Package_TO_SOT_THT:TO-220-3_Vertical, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the BU406?
TO-220-3L, with 3 pins. Its footprint is drawn on this page.
Where is the BU406 datasheet?
Jiangsu Changjing Electronics Technology (CJ) publishes it: the Datasheet link on this page opens it.
Where can I order the BU406?
JLCPCB lists it as part C81221, with 554 in stock; the sellers' links on this page open their listings.
What can replace the BU406?
Parts like it in the library: the TIP42C by STMicroelectronics, the TIP147 by Jiangsu Changjing Electronics Technology (CJ), the MJE13007 by onsemi and the MJE2955 by Jiangsu Changjing Electronics Technology (CJ). Check their datasheets: a part that fits the footprint may still differ in its ratings.
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