

Overview
The MMBT6427 is a darlington Transistor made by Diodes Incorporated in a SOT-23 package with 3 pins. -55℃~+150℃@(Tj) 1.5V@50mA,0.5mA 1.75V 12V 1uA 20000 2V 300mW 40V 500mA NPN SOT-23 Darlington Transistors ROHS.
PCBKit's library has its KiCad symbol (EasyEDA_Cloud:MMBTA14LT1G, from EasyEDA) and its footprint (Package_TO_SOT_SMD:SOT-23, from KiCad's library), ready for a KiCad board. 1,828 are in stock at JLCPCB (part C99273). 1 open-source board in 1 repository on GitHub use it.
Symbol
Footprint
Parameters
11- Collector - Emitter Voltage VCEO
- 40V
- Current - Collector Cutoff
- 1uA
- Current - Collector(Ic)
- 500mA
- DC Current Gain
- 20000
- Emitter-Base Voltage VEBO
- 12V
- Operating Temperature
- -55℃~+150℃@(Tj)
- Pd - Power Dissipation
- 300mW
- Type
- NPN
- Vbe On(VBE(on))
- 1.75V
- Vbe Saturation(VBE(sat))
- 2V
- Vce Saturation(VCE(sat))
- 1.5V@50mA,0.5mA
Order codes
1- MMBT6427-7-FLCSC C99273
Pinout
3| Pin | Name | Type |
|---|---|---|
| 1 | B | Unspecified |
| 2 | E | Unspecified |
| 3 | C | Unspecified |
Open-source boards using it
All 1- 2 layers152.4 × 88.9 mm

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Is there a KiCad symbol and footprint for the MMBT6427?
Yes. The symbol is EasyEDA_Cloud:MMBTA14LT1G 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.
What package is the MMBT6427?
SOT-23, with 3 pins. Its footprint is drawn on this page.
Where is the MMBT6427 datasheet?
Diodes Incorporated publishes it: the Datasheet link on this page opens it.
Where can I order the MMBT6427?
JLCPCB lists it as part C99273, with 1,828 in stock; the sellers' links on this page open their listings.
What can replace the MMBT6427?
Parts like it in the library: the BCV47 by Jiangsu Changjing Electronics Technology (CJ), the FMMT634TA by Diodes Incorporated, the MMBTA28 by Diodes Incorporated and the BCV27 by onsemi. Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the MMBT6427?
1 board in 1 repository on GitHub; the most starred are listed on this page, with their KiCad files.
Parts like it
8BCV47
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