

Overview
The FDC645N is a MOSFET made by onsemi in a TSOT-23-6 package with 6 pins. -55℃~+150℃ 1 N-channel 1.46nF 1.6W 21nC@4.5V 2V 30V 30mΩ@4.5V 5.5A 96pF N-Channel TSOT-23-6 MOSFETs ROHS.
PCBKit's library has its KiCad symbol (Pinmap_Generic:Q_NMOS_1D_2D_3G_4S_5D_6D, from PCBKit's generic symbols) and its footprint (Package_TO_SOT_SMD:TSOT-23-6, from KiCad's library), ready for a KiCad board. JLCPCB lists it (part C241775). 2 open-source boards in 2 repositories on GitHub use it.
Symbol
Footprint
Parameters
13- Current - Continuous Drain(Id)
- 5.5A
- Drain to Source Voltage
- 30V
- Gate Charge(Qg)
- 21nC@4.5V
- Gate Threshold Voltage (Vgs(th))
- 2V
- Input Capacitance(Ciss)
- 1.46nF
- Number
- 1 N-channel
- Operating Temperature
- -55℃~+150℃
- Output Capacitance(Coss)
- 227pF
- Pd - Power Dissipation
- 1.6W
- RDS(on)
- 30mΩ@4.5V
- Reverse Transfer Capacitance (Crss@Vds)
- 96pF
- Type
- N-Channel
- Vgs
- ±12V
Order codes
1- FDC645NLCSC C241775
Pinout
6| Pin | Name | Type |
|---|---|---|
| 1 | D | Passive |
| 2 | D | Passive |
| 3 | G | Input |
| 4 | S | Passive |
| 5 | D | Passive |
| 6 | D | Passive |
Open-source boards using it
All 2- 4 layers39 × 35.2 mm

- 4 layers120 × 40 mm

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<iframe src="https://pcbkit.io/embed/parts/onsemi/FDC645N" title="FDC645N 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/FDC645N.jpg" alt="FDC645N" width="1200" height="900">[](https://pcbkit.io/parts/onsemi/FDC645N)Questions
Is there a KiCad symbol and footprint for the FDC645N?
Yes. The symbol is Pinmap_Generic:Q_NMOS_1D_2D_3G_4S_5D_6D and the footprint Package_TO_SOT_SMD:TSOT-23-6, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the FDC645N?
TSOT-23-6, with 6 pins. Its footprint is drawn on this page.
Where is the FDC645N datasheet?
onsemi publishes it: the Datasheet link on this page opens it.
Where can I order the FDC645N?
JLCPCB lists it as part C241775, with 0 in stock; the sellers' links on this page open their listings.
What can replace the FDC645N?
Parts like it in the library: the AP3003 by ALLPOWER, the DMG6402LVT by Diodes Incorporated, the FDC655BN by TECH PUBLIC and the STT6N3LLH6 by TECH PUBLIC. Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the FDC645N?
2 boards in 2 repositories on GitHub; the most starred are listed on this page, with their KiCad files.
Parts like it
8AP3003
SOT-23-6-55℃~+150℃ 1 N-Channel + 1 P-Channel 1.5V 1.7W 30V 38mΩ@4.5V 4.8nC@4.5V 5.8A 52pF 66pF 700pF N-Channel + P-Channel SOT-23-6 MOSFETs ROHSALLPOWERMOSFETsDMG6402LVT
TSOT-23-6-55℃~+150℃ 1 N-channel 1.5V 1.75W 11.4nC@10V 22mΩ@10V 30V 45pF 498pF 52pF 6A TSOT-23-6 MOSFETs ROHSDiodes IncorporatedMOSFETsFDC655BN
SOT-23-6-55℃~+150℃ 1 N-channel 2.5V 2W 30V 32mΩ@4.5V 32pF 345pF 4.1nC@4.5V 55pF 6A SOT-23-6 MOSFETs ROHSTECH PUBLICMOSFETsSTT6N3LLH6
SOT-23-6-55℃~+150℃ 1 N-channel 2.5V 2W 30V 32mΩ@4.5V 32pF 345pF 4.1nC@4.5V 55pF 6A SOT-23-6 MOSFETs ROHSTECH PUBLICMOSFETsSIL08N03-TP
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SOT-23-6L-55℃~+150℃ 1 N-channel 1.6W 283pF 3.6nC@10V 30V 31pF 36mΩ@4.5V 6A SOT-23-6L MOSFETs ROHSSTMicroelectronicsMOSFETsNCE3406N
SOT-23-6-55℃~+150℃ 1 N-channel 20.5mΩ@10V 2W 30V 6A 77pF 820pF 9.5nC@4.5V 900mV 99pF N-Channel SOT-23-6 MOSFETs ROHSWuxi NCE Power SemiconductorMOSFETsTPM30V6NS6
SOT-23-6-55℃~+150℃ 1 N-channel 2.5V 2W 30V 32mΩ@4.5V 32pF 345pF 4.1nC@4.5V 55pF 6A SOT-23-6 MOSFETs ROHSTECH PUBLICMOSFETs