

Overview
The SI2309 is a MOSFET made by BORN in a SOT-23-3L package with 3 pins. -50℃~+150℃ 1 P-Channel 1.5V 15pF 200mΩ@4.5V 22pF 2A 310pF 5.4nC@30V 60V 800mW P-Channel ±20V SOT-23-3L MOSFETs ROHS.
PCBKit's library has its KiCad symbol (Pinmap_Generic:Q_PMOS_1G_2S_3D, from PCBKit's generic symbols) and its footprint (Package_TO_SOT_SMD:SOT-23-3, from KiCad's library), ready for a KiCad board. 30,550 are in stock at JLCPCB (part C431496). 2 open-source boards in 2 repositories on GitHub use it.
Symbol
Footprint
Parameters
15- Current - Continuous Drain(Id)
- 2A
- Drain Source On Resistance (RDS(on)@Vgs,Id)
- 300mΩ@4.5V,1A
- Drain to Source Voltage
- 60V
- Gate Charge(Qg)
- 5.4nC@30V
- Gate Threshold Voltage (Vgs(th))
- 1.5V
- Gate Threshold Voltage (Vgs(th)@Id)
- 2.5V@250μA
- Input Capacitance(Ciss)
- 310pF
- Number
- 1 P-Channel
- Operating Temperature
- -50℃~+150℃
- Output Capacitance(Coss)
- 22pF
- Pd - Power Dissipation
- 800mW
- RDS(on)
- 200mΩ@4.5V
- Reverse Transfer Capacitance (Crss@Vds)
- 15pF
- Type
- P-Channel
- Vgs
- ±20V
Order codes
1- SI2309LCSC C431496
Pinout
3| Pin | Name | Type |
|---|---|---|
| 1 | G | Input |
| 2 | S | Passive |
| 3 | D | Passive |
Open-source boards using it
All 2- 2 layers100 × 49.9 mm

- 2 layers109 × 59 mm

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<iframe src="https://pcbkit.io/embed/parts/born/SI2309" title="SI2309 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/SI2309.jpg" alt="SI2309" width="1200" height="900">[](https://pcbkit.io/parts/born/SI2309)Questions
Is there a KiCad symbol and footprint for the SI2309?
Yes. The symbol is Pinmap_Generic:Q_PMOS_1G_2S_3D and the footprint Package_TO_SOT_SMD:SOT-23-3, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the SI2309?
SOT-23-3L, with 3 pins. Its footprint is drawn on this page.
Where is the SI2309 datasheet?
BORN publishes it: the Datasheet link on this page opens it.
Where can I order the SI2309?
JLCPCB lists it as part C431496, with 30,550 in stock; the sellers' links on this page open their listings.
What can replace the SI2309?
Parts like it in the library: the ST3422A by STANSON Tech., the AP5N10S by ALLPOWER, the AP2310 by ALLPOWER and the AO3422-HXY by HXY MOSFET. Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the SI2309?
2 boards in 2 repositories on GitHub; the most starred are listed on this page, with their KiCad files.
Parts like it
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