2 layers73.1 × 65.2 mm
Module dual powerstage tiled
Squantor/DiySolderingStation
Do it yourself soldering station
252 parts7MIT
Overview
The BC858B is a bipolar made by BORN in a SOT-23 package with 3 pins. -55℃~+150℃ 1 PNP 100MHz 100mA 100nA 200 200mW 30V 500mV 5V PNP Standalone SOT-23 Bipolar (BJT) ROHS.
PCBKit's library has its KiCad symbol (Transistor_BJT:BC858, from KiCad's library) and its footprint (Package_TO_SOT_SMD:SOT-23, from KiCad's library), ready for a KiCad board. 9,374 are in stock at JLCPCB (part C7461206). 4 open-source boards in 2 repositories on GitHub use it.
Symbol
Footprint
Parameters
12- Collector - Emitter Voltage VCEO
- 30V
- Configuration
- Standalone
- Current - Collector Cutoff
- 100nA
- Current - Collector(Ic)
- 100mA
- DC Current Gain
- 200
- Emitter-Base Voltage(Vebo)
- 5V
- Number
- 1 PNP
- Operating Temperature
- -55℃~+150℃
- Pd - Power Dissipation
- 200mW
- Transition frequency(fT)
- 100MHz
- Vce Saturation(VCE(sat))
- 500mV
- type
- PNP
Order codes
1- BC858BLCSC C7461206
Pinout
3| Pin | Name | Type |
|---|---|---|
| 1 | B | Input |
| 2 | E | Passive |
| 3 | C | Passive |
Open-source boards using it
All 4- 4 layers234.5 × 81 mm
ZoneTherm
Max-Brants/ZoneTherm
A normal OpenTherm setup is one thermostat talking to one boiler. ZoneTherm sits in the middle of seven of those conversations at once:
239 parts - 2 layers36.3 × 21.4 mm
- 2 layers109.2 × 78.7 mm
Show this part on your page
<iframe src="https://pcbkit.io/embed/parts/born/BC858B" title="BC858B in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/born/BC858B.jpg" alt="BC858B" width="1200" height="900">[](https://pcbkit.io/parts/born/BC858B)Questions
Is there a KiCad symbol and footprint for the BC858B?
Yes. The symbol is Transistor_BJT:BC858 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 BC858B?
SOT-23, with 3 pins. Its footprint is drawn on this page.
Where is the BC858B datasheet?
BORN publishes it: the Datasheet link on this page opens it.
Where can I order the BC858B?
JLCPCB lists it as part C7461206, with 9,374 in stock; the sellers' links on this page open their listings.
What can replace the BC858B?
Parts like it in the library: the MMBT3904 by hongjiacheng, the S8050 by hongjiacheng, the SS8050 by hongjiacheng and the MMBT5551 by hongjiacheng. Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the BC858B?
4 boards in 2 repositories on GitHub; the most starred are listed on this page, with their KiCad files.
Parts like it
8
MMBT3904
SOT-23-55℃~+150℃ 1 NPN 100 100nA 200mA 200mW 300MHz 300mV 40V 6V NPN SOT-23 Bipolar (BJT) ROHShongjiachengBipolar (BJT)S8050
SOT-23-55℃~+150℃ 1 NPN 100MHz 100nA 120 25V 300mW 500mA 5V 600mV NPN SOT-23 Bipolar (BJT) ROHShongjiachengBipolar (BJT)SS8050
SOT-23-55℃~+150℃ 1 NPN 1.5A 100MHz 100nA 120 25V 300mW 500mV 5V NPN SOT-23 Bipolar (BJT) ROHShongjiachengBipolar (BJT)MMBT5551
SOT-23-55℃~+150℃ 1 NPN 100 100MHz 150mV 160V 300mW 50nA 600mA 6V NPN SOT-23 Bipolar (BJT) ROHShongjiachengBipolar (BJT)MMBT5401
SOT-23-55℃~+150℃ 1 PNP 100 100MHz 100nA 160V 200mV 300mW 5V 600mA PNP SOT-23 Bipolar (BJT) ROHShongjiachengBipolar (BJT)MMBT3904
SOT-23-55℃~+150℃ 1 NPN 100 100nA 200mA 200mW 300MHz 300mV 40V 6V NPN SOT-23 Bipolar (BJT) ROHSJiangsu Changjing Electronics Technology (CJ)Bipolar (BJT)MMBT5551
SOT-23-55℃~+150℃ 1 NPN 160V 200 200mV 300MHz 300mW 50nA 600mA 6V NPN SOT-23 Bipolar (BJT) ROHSJiangsu Changjing Electronics Technology (CJ)Bipolar (BJT)S8050 J3Y
SOT-23-55℃~+150℃ 1 NPN 100nA 150MHz 200 25V 300mW 500mA 5V 600mV NPN SOT-23 Bipolar (BJT) ROHSJiangsu Changjing Electronics Technology (CJ)Bipolar (BJT)