2 layers56 × 65 mm
SeaTalk1
dotnet/iot
This repo includes .NET Core implementations for various IoT boards, chips, displays and PCBs.
24 parts2.4kMIT
Overview
The BC557 is a bipolar made by DDF in a TO-92 package with 3 pins. 1 PNP 100mA 100nA 150MHz 45V 500mW 6V 800 90mV、250mV PNP TO-92 Bipolar (BJT) ROHS.
PCBKit's library has its KiCad symbol (Transistor_BJT:BC557, from KiCad's library) and its footprint (Package_TO_SOT_THT:TO-92_Inline, from KiCad's library), ready for a KiCad board. 1,543 are in stock at JLCPCB (part C50229578). 172 open-source boards in 144 repositories on GitHub use it.
Symbol
Footprint
Parameters
10- Collector - Emitter Voltage VCEO
- 45V
- Current - Collector Cutoff
- 100nA
- Current - Collector(Ic)
- 100mA
- DC Current Gain
- 800
- Emitter-Base Voltage(Vebo)
- 6V
- Number
- 1 PNP
- Pd - Power Dissipation
- 500mW
- Transition frequency(fT)
- 150MHz
- Vce Saturation(VCE(sat))
- 90mV
- type
- PNP
Order codes
1- BC557LCSC C50229578
Pinout
3| Pin | Name | Type |
|---|---|---|
| 1 | C | Passive |
| 2 | B | Input |
| 3 | E | Passive |
Open-source boards using it
All 172- 2 layers178 × 145 mm
Ultra DB X51 v1
ExploreEmbedded/8051_DevelopmentBoard
Design files and sample code for 8051 development Ultra Boards
145 parts70 - 2 layers148.8 × 132.2 mm
Usbflashprog
robsonsmartins/usbflashprog
A memory device programmer (Flash/EPROM/E2PROM) board and software, connected to PC by USB port.
125 parts36 - 2 layers47 × 25 mm
Monotron cv adapter
matthewcieplak/monotron-cv-adapter
A eurorack control voltage to Korg Monotron CV adapter board.
8 parts35 - 2 layers83.8 × 72.4 mm
- 2 layers13 × 0.5 mm
- 2 layers167.8 × 200.6 mm
Random Jazz Generator
telec16/modular-synth
Little side project, don't expect much updates.
132 parts16 - 2 layers60 × 55 mm
Show this part on your page
<iframe src="https://pcbkit.io/embed/parts/ddf/BC557" title="BC557 in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/ddf/BC557.jpg" alt="BC557" width="1200" height="900">[](https://pcbkit.io/parts/ddf/BC557)Questions
Is there a KiCad symbol and footprint for the BC557?
Yes. The symbol is Transistor_BJT:BC557 and the footprint Package_TO_SOT_THT:TO-92_Inline, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the BC557?
TO-92, with 3 pins. Its footprint is drawn on this page.
Where is the BC557 datasheet?
DDF publishes it: the Datasheet link on this page opens it.
Where can I order the BC557?
JLCPCB lists it as part C50229578, with 1,543 in stock; the sellers' links on this page open their listings.
What can replace the BC557?
Parts like it in the library: the 2N3904 by JSMSEMI, the 2N3904BU by onsemi, the PN2222ABU by onsemi and the BC547B by LGE. Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the BC557?
172 boards in 144 repositories on GitHub; the most starred are listed on this page, with their KiCad files.
Parts like it
8
2N3904
TO-92-55℃~+150℃ 1 NPN 200mA 300 300MHz 300mV 40V 50nA 625mW 6V NPN TO-92 Bipolar (BJT) ROHSJSMSEMIBipolar (BJT)2N3904BU
TO-92-55℃~+150℃ 1 NPN 100 200mA 200mV 300MHz 40V 50nA 625mW 6V NPN TO-92 Bipolar (BJT) ROHSonsemiBipolar (BJT)PN2222ABU
TO-92-3L-55℃~+150℃ 1 NPN 10uA 1A 300MHz 300mV 35 40V 625mW 6V NPN TO-92-3L Bipolar (BJT) ROHSonsemiBipolar (BJT)BC547B
TO-921 NPN 100mA 100nA 150MHz 200 300mV 45V 625mW 6V NPN TO-92 Bipolar (BJT) ROHSLGEBipolar (BJT)MPSA92
TO-921 PNP 1.5W 250nA 300V 40 500mA 500mV 50MHz 5V PNP TO-92 Bipolar (BJT) ROHSFoshan Blue Rocket ElecBipolar (BJT)2N3906
TO-921 PNP 100 100nA 200mA 250MHz 400mV 40V 5V 625mW PNP TO-92 Bipolar (BJT) ROHSJSMSEMIBipolar (BJT)2N3904-338
TO-92-55℃~+150℃ 1 NPN 1.5W 100nA 200mA 300MHz 300mV 400 40V 6V NPN TO-92 Bipolar (BJT) ROHSALJBipolar (BJT)S8050D331
TO-92-55℃~+150℃ 1 NPN 100nA 150MHz 25V 400 500mA 5V 600mV 625mW NPN TO-92 Bipolar (BJT) ROHSALJBipolar (BJT)