Overview
The MMBT2222A is a small signal NPN bipolar junction transistor (BJT) available in the SOT-23 package. It is the surface-mount equivalent of the popular 2N2222A transistor. This transistor is widely used in electronic circuits due to its high current gain, fast switching speed, and compact form factor, making it ideal for applications where space is a constraint.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Collector-Emitter Voltage (Vce) | 40 | V |
| Collector-Base Voltage (Vcb) | 75 | V |
| Emitter-Base Voltage (Veb) | 6 | V |
| Continuous Collector Current (Ic) | 600 | mA |
| DC Current Gain (hFE) | 100 to 300 | |
| Total Power Dissipation | 350 | mW |
| Transition Frequency (fT) | 270 | MHz |
| Operating Temperature (TJ) | 150 | °C |
| Package Type | SOT-23 |
Key Features
- Bi-Polar small signal NPN Transistor
- High current gain and fast switching speed
- Low saturation voltage (VCE(sat) < 300mV @ 150mA)
- Complementary PNP type: MMBT2907A
- Ideal for low power amplification and switching
- Totally lead-free and fully RoHS compliant
- Halogen- and antimony-free, making it a “green” device
- Rise and fall time of 25ns and 60ns respectively
Applications
- Driver modules like relay drivers, LED drivers, etc.
- Switching loads up to 600mA
- Motor speed control
- Inverter and rectifier circuits
- Darlington pair designs
- Audio amplifiers and other low power amplification circuits
- Digital logic circuits requiring fast switching
Q & A
- What is the MMBT2222A transistor?
The MMBT2222A is a small signal NPN bipolar junction transistor available in the SOT-23 package, known for its high current gain and fast switching speed.
- What are the key specifications of the MMBT2222A transistor?
Key specifications include a collector-emitter voltage of 40V, collector-base voltage of 75V, emitter-base voltage of 6V, and a continuous collector current of 600mA.
- What is the package type of the MMBT2222A transistor?
The MMBT2222A is packaged in a SOT-23 plastic package.
- What are the typical applications of the MMBT2222A transistor?
Typical applications include driver modules, switching loads, motor speed control, inverter and rectifier circuits, and Darlington pair designs.
- How does the MMBT2222A differ from the 2N2222A transistor?
The MMBT2222A and 2N2222A share similar specifications but differ in packaging; the MMBT2222A is in a SOT-23 package, while the 2N2222A is in a TO-18 metal can package.
- What is the maximum power dissipation of the MMBT2222A transistor?
The maximum power dissipation is 350mW.
- Is the MMBT2222A transistor RoHS compliant?
- What is the transition frequency of the MMBT2222A transistor?
The transition frequency (fT) is 270MHz.
- How can you identify a faulty MMBT2222A transistor?
A faulty transistor can be identified by measuring its base-emitter and base-collector junctions with a multimeter.
- What is the complementary PNP type of the MMBT2222A transistor?
The complementary PNP type is the MMBT2907A.
