

Overview
The BC549CTA is a bipolar made by onsemi in a TO-92-3L package with 3 pins. 1 NPN 100mA 15nA 250mV 300MHz 30V 420 500mW 5V NPN TO-92-3L Bipolar (BJT) ROHS.
PCBKit's library has its KiCad symbol (Transistor_BJT:BC549, from KiCad's library) and its footprint (Package_TO_SOT_THT:TO-92_Inline, from KiCad's library), ready for a KiCad board. 9,315 are in stock at JLCPCB (part C900803). 1 open-source board in 1 repository on GitHub use it.
Symbol
Footprint
Parameters
11- Collector - Emitter Voltage VCEO
- 30V
- Configuration
- Standalone
- Current - Collector Cutoff
- 15nA
- Current - Collector(Ic)
- 100mA
- DC Current Gain
- 420
- Emitter-Base Voltage(Vebo)
- 5V
- Number
- 1 NPN
- Pd - Power Dissipation
- 500mW
- Transition frequency(fT)
- 300MHz
- Vce Saturation(VCE(sat))
- 250mV
- type
- NPN
Order codes
1- BC549CTALCSC C900803
Pinout
3| Pin | Name | Type |
|---|---|---|
| 1 | C | Passive |
| 2 | B | Input |
| 3 | E | Passive |
Open-source boards using it
All 1- 2 layers43.8 × 57.5 mm

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<iframe src="https://pcbkit.io/embed/parts/onsemi/BC549CTA" title="BC549CTA in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/onsemi/BC549CTA.jpg" alt="BC549CTA" width="1200" height="900">[](https://pcbkit.io/parts/onsemi/BC549CTA)Questions
Is there a KiCad symbol and footprint for the BC549CTA?
Yes. The symbol is Transistor_BJT:BC549 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 BC549CTA?
TO-92-3L, with 3 pins. Its footprint is drawn on this page.
Where is the BC549CTA datasheet?
onsemi publishes it: the Datasheet link on this page opens it.
Where can I order the BC549CTA?
JLCPCB lists it as part C900803, with 9,315 in stock; the sellers' links on this page open their listings.
What can replace the BC549CTA?
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 BC549CTA?
1 board in 1 repository on GitHub; the most starred are listed on this page, with their KiCad files.
Parts like it
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