MMST2222A Datasheet & Equivalents
NPN
SOT-323
General Purpose
MSKSEMI
VCEO
40V
Ic Max
600mA
Pd Max
200mW
hFE Gain
300
Quick Reference
The MMST2222A is a NPN bipolar junction transistor in a SOT-323 package, manufactured by MSKSEMI. 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 | MSKSEMI | Original Manufacturer |
| Package | SOT-323 | 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) | 200mW | Max thermal limit |
| DC Current Gain (hFE) | 300 | Base signal amplification ratio |
| Transition Frequency (fT) | 1.2MHz | 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 |
|---|---|---|---|---|---|---|---|
| MMST2222AQ | NPN | SOT-323 | 40V | 600mA | 300 | 200mW | YANGJIE 📄 PDF |
| MMST4401 | NPN | SOT-323 | 40V | 600mA | 300 | 200mW | MSKSEMI 📄 PDF |
| MMST2222A-7-F | NPN | SOT-323 | 40V | 600mA | 100 | 200mW | DIODES 📄 PDF |
| MMST2222A-TP | NPN | SOT-323 | 40V | 600mA | 100 | 200mW | MCC 📄 PDF |
| MMST4401-7-F | NPN | SOT-323 | 40V | 600mA | 80 | 200mW | DIODES 📄 PDF |
| PMST4401 | NPN | SOT-323 | 40V | 600mA | 80 | 200mW | Nexperia 📄 PDF |
| 115 | NPN | SOT-323 | 40V | 600mA | 80 | 200mW | Nexperia 📄 PDF |
| PMST4401 | NPN | SOT-323 | 40V | 600mA | 35 | 150mW | onsemi 📄 PDF |
| 135 | NPN | SOT-323 | 40V | 600mA | 20 | 150mW | onsemi 📄 PDF |
| MMBT2222AWT1G | NPN | SOT-323 | 60V | 750mA | 200 | 415mW | Nexperia 📄 PDF |
| MMBT4401WT1G | NPN | SOT-323 | 60V | 1A | 100 | 400mW | DIODES 📄 PDF |
| PBSS4160U | NPN | SOT-323 | 60V | 1A | 100 | 250mW | JSCJ 📄 PDF |