2N3904BU Datasheet & Equivalents
NPN
TO-92
General Purpose
onsemi
VCEO
40V
Ic Max
200mA
Pd Max
625mW
hFE Gain
100
Quick Reference
The 2N3904BU 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 200mA. 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) | 200mA | Max current handling |
| Power Dissipation (Pd) | 625mW | Max thermal limit |
| DC Current Gain (hFE) | 100 | Base signal amplification ratio |
| Transition Frequency (fT) | 300MHz | Max operating frequency |
| Saturation Voltage (VCEsat) | 200mV | Voltage drop when fully ON |
| Emitter-Base Voltage (Vebo) | 6V | Max emitter-base breakdown |
| Collector Cutoff Current | 50nA | Leakage current when OFF |
| Operating Temp | -55℃~+150℃ | Safe junction temperature range |
Equivalent Transistors & Alternatives
| Part | Type | Package | VCEO | IC | hFE | Pd | Manufacturer / Datasheet |
|---|---|---|---|---|---|---|---|
| 2N3904TFR | NPN | TO-92 | 40V | 200mA | 100 | 625mW | onsemi 📄 PDF |
| 2N3904TA | NPN | TO-92 | 40V | 200mA | 40 | 625mW | onsemi 📄 PDF |
| 2N3904X | NPN | TO-92 | 40V | 200mA | 300 | 625mW | JingYang 📄 PDF |
| 2N3904 | NPN | TO-92 | 40V | 200mA | 300 | 625mW | JSMSEMI 📄 PDF |
| MPSA05RA | NPN | TO-92 | 60V | 500mA | 100 | 625mW | onsemi 📄 PDF |
| MPSA06 | NPN | TO-92 | 80V | 500mA | 100 | 625mW | onsemi 📄 PDF |
| MPSA06-TA(RANGE:100-400) | NPN | TO-92 | 80V | 500mA | 400 | 625mW | JSCJ 📄 PDF |