

Overview
The MMBFJ201 is a JFET made by onsemi in a SOT-23-3L package with 3 pins. -55℃~+150℃ 1mA 300mV 350mW 40V N-Channel SOT-23-3L JFETs ROHS.
PCBKit's library has its KiCad symbol (EasyEDA_Cloud:MMBFJ202, from EasyEDA) and its footprint (Package_TO_SOT_SMD:SOT-23-3, from KiCad's library), ready for a KiCad board. 20,001 are in stock at JLCPCB (part C891687). 22 open-source boards in 18 repositories on GitHub use it.
Symbol
Footprint
From the datasheet
3- Junction, hottest
- 150 °C · Operating junction temperature, max · p. 2
- Gate-source, most
- 40 V · Gate-Source Voltage, absolute maximum rating · p. 2
- Junction to air (SOT-23 3L)
- 357 K/W · Junction-to-ambient thermal resistance, max; specified FR-4 PCB · p. 3
What it is and has
2- Device function
- N-Channel General-Purpose Amplifier · p. 2
- Package
- SOT-23 3L · p. 2
Specifications
12| Parameter | Conditions | As printed | Page |
|---|---|---|---|
| Drain-Gate Voltage VDG | TA = 25°C | max 40 V | 2 |
| Gate-Source Voltage VGS | TA = 25°C | max -40 V | 2 |
| Forward Gate Current IGF | TA = 25°C | max 50 mA | 2 |
| Operating and Storage Junction Temperature Range TJ, TSTG | min -55 · max 150 °C | 2 | |
| Total Device Dissipation PD | TA = 25°C; device mounted on FR-4 PCB 36mm × 18mm × 1.5mm; mounting pad for the collector lead minimum 6cm2 | max 350 mW | 3 |
| Derate Above 25°C PD | Device mounted on FR-4 PCB 36mm × 18mm × 1.5mm; mounting pad for the collector lead minimum 6cm2 | max 2.8 mW/°C | 3 |
| Thermal Resistance, Junction-to-Ambient RθJA | TA = 25°C; device mounted on FR-4 PCB 36mm × 18mm × 1.5mm; mounting pad for the collector lead minimum 6cm2 | max 357 °C/W | 3 |
| Gate-Source Breakdown Voltage V(BR)GSS | TA = 25°C; IG = -1.0 uA, VDS = 0 | min -40 V | 3 |
| Gate Reverse Current IGSS | TA = 25°C; VGS = -20 V, VDS = 0 | max -100 pA | 3 |
| Gate-Source Cut-Off Voltage VGS(off) | MMBFJ201; TA = 25°C; VDS = 20 V, ID = 10 nA | min -0.3 · max -1.5 V | 3 |
| Zero-Gate Voltage Drain Current(4) IDSS | MMBFJ201; TA = 25°C; VDS = 20 V, IGS = 0; pulse width ≤ 300 us, duty cycle ≤ 2.0% | min 0.2 · max 1 mA | 3 |
| Forward Transfer Admittance yFS | MMBFJ201; TA = 25°C; VDS = 20 V, f = 1.0 kHz | min 500 umhos | 3 |
Ordering codes, by the datasheet
1- MMBFJ201
- SOT-23 3L · Top mark 62P; Tape and Reel · p. 2
Parameters
10- Configuration
- Standalone
- Drain Current (Idss)
- 1mA
- FET Type
- N-Channel
- Gate-Source Breakdown Voltage (Vgss)
- 40V
- Gate-Source Cutoff Voltage (VGS(off))
- 300mV
- Junction Temperature(Max)
- 150℃
- Number
- 1 N-channel
- Operating Temperature
- -55℃~+150℃
- Pd - Power Dissipation
- 350mW
- Thermal Resistance(Junction to Ambient)
- 357℃/W
Order codes
1- MMBFJ201LCSC C891687
Pinout
3| Pin | Name | Type |
|---|---|---|
| 1 | D | Unspecified |
| 2 | S | Unspecified |
| 3 | G | Unspecified |
Open-source boards using it
All 22- 2 layers104 × 158 mm

- 4 layers104 × 158 mm

- 4 layers52.5 × 59.7 mm

ESPHome Indoor Multi Sensor
mikelawrence/esphome-indoor-multi-sensor-hardware
ESPHome Indoor Multi-Sensor hardware. This design supports Radar/PIR Presence, Temperature, Humidity, Pressure, Light, CO2, CO, VOC, NOX and PM sensors.
113 parts14CERN-OHL-P-2.0 - 2 layers39.5 × 80.5 mm

Cem3340-vco
carr-james/cem3340-vco
A clone of Kassutronics 3340. Entirely for the purpose of learning how to build a Eurorack module, start to finish.
58 parts7 - 2 layers99 × 99 mm

Ultimate soldering exercise
dvhx/smd-soldering-exercise-0805
Ultimate SMD soldering exercise full of 0805 resistor and caps, SOT-23 transistors and SOIC-8 opamps - 23 guitar pedals on one 10x10cm PCB.
464 parts6GPL-3.0 - 2 layers302 × 135 mm

- 2 layers76 × 28 mm

- 2 layers188.4 × 185 mm

Show this part on your page
<iframe src="https://pcbkit.io/embed/parts/onsemi/MMBFJ201" title="MMBFJ201 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/MMBFJ201.jpg" alt="MMBFJ201" width="1200" height="900">[](https://pcbkit.io/parts/onsemi/MMBFJ201)Questions
Is there a KiCad symbol and footprint for the MMBFJ201?
Yes. The symbol is EasyEDA_Cloud:MMBFJ202 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 MMBFJ201?
SOT-23-3L, with 3 pins. Its footprint is drawn on this page.
Where is the MMBFJ201 datasheet?
onsemi publishes it: the Datasheet link on this page opens it.
Where can I order the MMBFJ201?
JLCPCB lists it as part C891687, with 20,001 in stock; the sellers' links on this page open their listings.
What can replace the MMBFJ201?
Parts like it in the library: the MMBFJ112 by onsemi, the MMBFJ110 by onsemi, the IF1320ST3TR by InterFET and the IF140AST3 by InterFET. Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the MMBFJ201?
22 boards in 18 repositories on GitHub; the most starred are listed on this page, with their KiCad files.
Parts like it
8MMBFJ112
SOT-23-3L-55℃~+150℃ 1 N-channel 1V 350mW 35V 50Ω 5mA N-Channel SOT-23-3L JFETs ROHSonsemiJFETsMMBFJ110
SOT-23-31 N-channel 10mA 18Ω 25V 460mW 4V N-Channel SOT-23-3 JFETs ROHSonsemiJFETsIF1320ST3TR
SOT-23-3JFETsInterFETIF140AST3
SOT-23-3JFETsInterFETIF140ST3
SOT-23-3JFETsInterFETIF140ST3TR
SOT-23-3JFETsInterFETIF170AST3
SOT-23-3JFETsInterFETIF170AST3TR
SOT-23-3JFETsInterFET