
Pwr
mfkiwl/KiwiSDR_PCB
KiCAD PCB files for KiwiSDR project including active antenna and bias tee

The MMBT4401 is a bipolar made by Diodes Incorporated in a SOT-23 package with 3 pins. -55℃~+150℃ 1 NPN 100nA 250MHz 350mW 400mV 40V 600mA 6V 80 NPN SOT-23 Bipolar (BJT) ROHS.
PCBKit's library has its KiCad symbol (Pinmap_Generic:Q_NPN_1B_2E_3C, from PCBKit's generic symbols) and its footprint (Package_TO_SOT_SMD:SOT-23, from KiCad's library), ready for a KiCad board. 35,418 are in stock at JLCPCB (part C151826). 10 open-source boards in 10 repositories on GitHub use it.
| Parameter | Conditions | As printed | Page |
|---|---|---|---|
| Collector-Base Voltage VCBO | TA = +25°C | max 60 V | 2 |
| Collector-Emitter Voltage VCEO | TA = +25°C | max 40 V | 2 |
| Emitter-Base Voltage VEBO | TA = +25°C | max 6 V | 2 |
| Collector Current IC | TA = +25°C | max 600 mA | 2 |
| Peak Collector Current ICM | TA = +25°C | max 1 A | 2 |
| Peak Base Current IBM | TA = +25°C | max 200 mA | 2 |
| Power Dissipation PD | TA = +25°C; Note 5 | max 310 mW | 2 |
| Power Dissipation PD | TA = +25°C; Note 6 | max 350 mW | 2 |
| Thermal Resistance, Junction to Ambient RθJA | TA = +25°C; Note 5 | max 403 C/W | 2 |
| Thermal Resistance, Junction to Ambient RθJA | TA = +25°C; Note 6 | max 357 C/W | 2 |
| Thermal Resistance, Junction to Leads RθJL | TA = +25°C; Note 7 | max 350 C/W | 2 |
| Thermal Resistance, Junction to Case RθJC | TA = +25°C; Note 5 | max 120 C/W | 2 |
| Operating and Storage Temperature Range TJ,TSTG | min -55 · max 150 C | 2 | |
| Electrostatic Discharge - Human Body Model ESD HBM | Note 8; JEDEC Class 3A | max 4000 V | 2 |
| Electrostatic Discharge - Machine Model ESD MM | Note 8; JEDEC Class C | max 400 V | 2 |
| Electrostatic Discharge – Charged Device Model ESD CDM | Note 8; JEDEC Class C3 | max 1000 V | 2 |
| Collector-Base Breakdown Voltage BVCBO | TA = +25°C; IC = 100uA | min 60 V | 4 |
| Collector-Emitter Breakdown Voltage (Note 9) BVCEO | TA = +25°C; IC = 10mA | min 40 V | 4 |
| Emitter-Base Breakdown Voltage BVEBO | TA = +25°C; IE = 100uA | min 6 V | 4 |
| Collector Cutoff Current ICEX | TA = +25°C; VCE = 35V, VEB(off) = 0.4V | max 100 nA | 4 |
| Base Cutoff Current IBL | TA = +25°C; VCE = 35V, VEB(off) = 0.4V | max 100 nA | 4 |
| DC Current Gain hFE | TA = +25°C; IC = 100uA, VCE = 1V; Note 9 | min 20 | 4 |
| DC Current Gain hFE | TA = +25°C; IC = 1mA, VCE = 1V; Note 9 | min 40 | 4 |
| DC Current Gain hFE | TA = +25°C; IC = 10mA, VCE = 1V; Note 9 | min 80 | 4 |
| DC Current Gain hFE | TA = +25°C; IC = 150mA, VCE = 1V; Note 9 | min 100 · max 300 | 4 |
| DC Current Gain hFE | TA = +25°C; IC = 500mA, VCE = 2V; Note 9 | min 40 | 4 |
| Collector-Emitter Saturation Voltage VCE(sat) | TA = +25°C; IC = 150mA, IB = 15mA; Note 9 | max 0.4 V | 4 |
| Collector-Emitter Saturation Voltage VCE(sat) | TA = +25°C; IC = 500mA, IB = 50mA; Note 9 | max 0.75 V | 4 |
| Base-Emitter Saturation Voltage VBE(sat) | TA = +25°C; IC = 150mA, IB = 15mA; Note 9 | min 0.75 · max 0.95 V | 4 |
| Base-Emitter Saturation Voltage VBE(sat) | TA = +25°C; IC = 500mA, IB = 50mA; Note 9 | max 1.2 V | 4 |
| Output Capacitance Ccb | TA = +25°C; VCB = 5V, f = 1MHz | max 6.5 pF | 4 |
| Input Capacitance Ceb | TA = +25°C; VEB = 0.5V, f = 1MHz | max 30 pF | 4 |
| Input Impedance hie | TA = +25°C; VCE = 10V, IC = 1mA, f = 1kHz | min 1 · max 15 kΩ | 4 |
| Voltage Feedback Ratio hre | TA = +25°C; VCE = 10V, IC = 1mA, f = 1kHz | min 0.1 · max 8 x 10-4 | 4 |
| Small Signal Current Gain hfe | TA = +25°C; VCE = 10V, IC = 1mA, f = 1kHz | min 40 · max 500 | 4 |
| Output Admittance hoe | TA = +25°C; VCE = 10V, IC = 1mA, f = 1kHz | min 1 · max 30 uS | 4 |
| Current Gain-Bandwidth Product fT | TA = +25°C; VCE = 10V, IC = 20mA, f = 100MHz | min 250 MHz | 4 |
| Delay Time td | TA = +25°C; VCC = 30V, IC = 150mA, VBE(off) = 2V, IB1 = 15mA | max 15 ns | 4 |
| Rise Time tr | TA = +25°C; VCC = 30V, IC = 150mA, VBE(off) = 2V, IB1 = 15mA | max 20 ns | 4 |
| Storage Time ts | TA = +25°C; VCC = 30V, IC = 150mA, IB1 = -IB2 = 15mA | max 225 ns | 4 |
| Fall Time tf | TA = +25°C; VCC = 30V, IC = 150mA, IB1 = -IB2 = 15mA | max 30 ns | 4 |
| Pin | Name | Type |
|---|---|---|
| 1 | B | Input |
| 2 | E | Passive |
| 3 | C | Passive |

mfkiwl/KiwiSDR_PCB
KiCAD PCB files for KiwiSDR project including active antenna and bias tee


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Untested, unverifed, AI created design.
<iframe src="https://pcbkit.io/embed/parts/diodes/MMBT4401" title="MMBT4401 in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/diodes/MMBT4401.jpg" alt="MMBT4401" width="1200" height="900">[](https://pcbkit.io/parts/diodes/MMBT4401)Yes. The symbol is Pinmap_Generic:Q_NPN_1B_2E_3C and the footprint Package_TO_SOT_SMD:SOT-23, both drawn on this page. PCBKit places them on a board for you when you design with it.
SOT-23, with 3 pins. Its footprint is drawn on this page.
Diodes Incorporated publishes it: the Datasheet link on this page opens it.
JLCPCB lists it as part C151826, with 35,418 in stock; the sellers' links on this page open their listings.
Parts like it in the library: the MMBT2907ALT1G by onsemi, the MMBT2222A by STMicroelectronics, the 2N5551S-RTK/P by KEC Semicon and the MMBT8050D by STMicroelectronics. Check their datasheets: a part that fits the footprint may still differ in its ratings.
10 boards in 10 repositories on GitHub; the most starred are listed on this page, with their KiCad files.