2N4401BU Datasheet & Equivalents
NPN
TO-92
General Purpose
onsemi
VCEO
40V
Ic Max
600mA
Pd Max
625mW
hFE Gain
80
Quick Reference
The 2N4401BU is a NPN bipolar junction transistor in a TO-92 package, manufactured by onsemi. It supports a breakdown voltage of 40V and continuous collector current of 600mA. It is widely used in switching and amplification circuits.
Technical Specifications
| Parameter | Value | Description |
|---|---|---|
| Manufacturer | onsemi | Original Manufacturer |
| Package | TO-92 | Physical mounting |
| Transistor Type | BJT | Bipolar Junction Transistor |
| Category | Single | Configuration |
| Collector-Emitter Voltage (VCEO) | 40V | Max breakdown voltage |
| Collector Current (Ic) | 600mA | Max current handling |
| Power Dissipation (Pd) | 625mW | Max thermal limit |
| DC Current Gain (hFE) | 80 | Base signal amplification ratio |
| Transition Frequency (fT) | 250MHz | Max operating frequency |
| Saturation Voltage (VCEsat) | - | Voltage drop when fully ON |
| Emitter-Base Voltage (Vebo) | - | Max emitter-base breakdown |
| Collector Cutoff Current | - | Leakage current when OFF |
| Operating Temp | -55℃~+150℃ | Safe junction temperature range |
Equivalent Transistors & Alternatives
| Part | Type | Package | VCEO | IC | hFE | Pd | Manufacturer / Datasheet |
|---|---|---|---|---|---|---|---|
| 2N4401TA | NPN | TO-92 | 40V | 600mA | 80 | 625mW | onsemi 📄 PDF |
| KSP2222ABU | NPN | TO-92 | 40V | 600mA | 75 | 625mW | onsemi 📄 PDF |
| 2N2222A | NPN | TO-92 | 40V | 600mA | 100 | 625mW | BLUE ROCKET 📄 PDF |
| 2N2222A | NPN | TO-92 | 40V | 600mA | 40 | 625mW | ST(Semtech) 📄 PDF |
| 2N4401TFR | NPN | TO-92 | 40V | 600mA | 20 | 625mW | onsemi 📄 PDF |
| MPS2222A | NPN | TO-92 | 40V | 600mA | 200 | 625mW | JSMSEMI 📄 PDF |
| 2N2222A-338 | NPN | TO-92 | 40V | 600mA | 300 | 625mW | ALJ 📄 PDF |
| 2N4401BU-HXY | NPN | TO-92 | 40V | 600mA | 300 | 625mW | HXY MOSFET 📄 PDF |
| KN4401-HXY | NPN | TO-92 | 40V | 600mA | 300 | 625mW | HXY MOSFET 📄 PDF |
| KSP2222ABU-HXY | NPN | TO-92 | 40V | 600mA | 300 | 625mW | HXY MOSFET 📄 PDF |
| KTC3202-Y-HXY | NPN | TO-92 | 40V | 600mA | 300 | 625mW | HXY MOSFET 📄 PDF |
| 2N2222A | NPN | TO-92 | 40V | 600mA | 300 | 625mW | HXY MOSFET 📄 PDF |
| PN2222ABU | NPN | TO-92 | 40V | 1A | 35 | 625mW | onsemi 📄 PDF |
| PN2222ATA | NPN | TO-92 | 40V | 1A | 35 | 625mW | onsemi 📄 PDF |
| PN2222ATF | NPN | TO-92 | 40V | 1A | 35 | 625mW | onsemi 📄 PDF |
| PN2222ATFR | NPN | TO-92 | 40V | 1A | 35 | 625mW | onsemi 📄 PDF |
| BC337 | NPN | TO-92 | 45V | 800mA | 100 | 625mW | BLUE ROCKET 📄 PDF |
| BC33725TA | NPN | TO-92 | 45V | 800mA | 100 | 625mW | onsemi 📄 PDF |
| BC337-25BK | NPN | TO-92 | 45V | 800mA | 160 | 625mW | DIOTEC 📄 PDF |
| ZTX450 | NPN | TO-92 | 45V | 1A | 100 | 1W | DIODES 📄 PDF |