The MMBT2222a is a general purpose NPN transistor comes in SMD Transistor with SOT-23 package. General marking of this transistor is “1P”,This transistor is similar to the normal TO-92 package based transistor of 2N2222A. Used for general switching applications and signal amplification. This article share the information’s about its Pinout, Equivalent and Specifications.
MMBT2222A (1P) Transistor Overview
MMBT2222a SMD transistor is a general use transistor common in latest electronic circuits and devices. This transistor is commonly marked as “1P”. This NPN transistor can handle maximum collector emitter voltage of 40V and Collector current of 600mA.
MMBT2222A (1P) Pinout Diagram
Hold the transistor as flat and the numbering in the upper side. Then count the pin from bottom to left to right and top. This transistor has three terminals the left side pin is Base, right side is Emitter and upper side is collector.
Pinout Configuration
| Pin Number | Pin Name |
|---|---|
| 1 | Base |
| 2 | Emitter |
| 3 | Collector |
👉 The Base pin controls the current flow between collector and emitter. So this making the MMBT2222A Transistor as an ideal choice for switching and signal amplification.
MMBT2222A (1P) Transistor Specifications
| Parameter | Value / Rating |
|---|---|
| Collector-Emitter Voltage | 40 V (Maximum) |
| Continuous Collector Current | 600 mA |
| DC Current Gain | 100 to 300 (at collector current = 150 mA) |
| Transition Frequency | 300 MHz |
| Power Dissipation | 300 mW to 350 mW (depends on PCB mounting) |
MMBT2222A SMD Equivalent
PMBT2222A, KST2222A, SMBT2222A, MMST2222A. Different manufacturers produce the same transistor with different suffixes in their name, but the transistor is the same. If you find this, you can directly replace it.
BC817 has same collector current but lower transition frequency but you can use it. MMBT4401 has the same collector emitter voltage and current, so it is very common alternative. You can also use on semi transistor of BCW65 for small signal amplifications.
MMBT2222A vs 2N2222A Comparison
| Parameter | MMBT2222A (1P) | 2N2222A |
|---|---|---|
| Package Type | SMD (SOT-23) | Through hole (TO-92 / TO-18) |
| Mounting Type | Surface Mount | Through hole |
| Collector Current (IC) | 600 mA | 600 mA |
| Collector-Emitter Voltage (VCEO) | 40 V | 40 V |
| Power Dissipation (PD) | 300 to 350 mW | 500 mW to 625 mW |
| Transition Frequency (fT) | 300 MHz | 250 to300 MHz |
| Size | Very small | Larger size |
| Typical Use | Compact electronics, SMD circuits | Prototyping, general purpose circuits |
| Replacement | SMD version of 2N2222A | Through hole version |
👉 The MMBT2222A is the SMD transistor version of the 2N2222A. This transistor is offering the same performance in a much smaller package.
Applications
- This transistor is used a switching transistor because its specifications are best for working as a switch in circuit.
- It can amplify the signals.
Frequently Asked Questions
It is a SMD version of normal 2N2222A transistor. This SMD transistor can be used in small and compact electronic devices like mobile, laptop and other small pcb circuits.
Almost Yes, but exactly it is known as MMBT2222A. both transistors has same specifications like voltage and current.
