MJE243G
NPN power transistors, 100V, 4A, 15W, TO-225 package
Manufacturer： ['onsemi', 'lrc']
series introduction
# Introduction to the MJE243G Product Series
## Overview
The MJE243G product series is a remarkable line of electronic components that has been engineered to meet the diverse and demanding requirements of modern electronic circuits. These components are designed with precision and adhere to high - quality standards, making them a reliable choice for a wide range of applications.
## Key Features
### Electrical Characteristics
- **High Current Gain**: The MJE243G transistors in this series offer a high current gain (hFE). This characteristic is crucial as it allows for efficient signal amplification. A high current gain means that a small input current can control a much larger output current, enabling the design of circuits with high sensitivity and low power consumption. For example, in audio amplifier circuits, a high current gain helps in accurately reproducing the input audio signal with minimal distortion.
- **Low Collector - Emitter Saturation Voltage**: These components have a low collector - emitter saturation voltage (VCE(sat)). When the transistor is in the saturation region, a low VCE(sat) reduces power dissipation across the device. This is beneficial in power - sensitive applications such as battery - powered devices, where minimizing power loss is essential to extend battery life.
- **Good Frequency Response**: The MJE243G series exhibits an excellent frequency response. It can handle a wide range of frequencies, making it suitable for both low - frequency and high - frequency applications. In radio frequency (RF) circuits, the ability to operate at different frequencies allows for the design of tunable circuits that can receive and transmit signals across various frequency bands.
### Physical Characteristics
- **Compact Package Design**: The transistors in the MJE243G series come in a compact package. This small form factor is advantageous in modern electronic devices, where space is often at a premium. It allows for the design of more densely packed circuit boards, reducing the overall size of the electronic product. For example, in portable electronic devices like smartphones and tablets, the compact size of these components helps in achieving a sleek and lightweight design.
- **High Thermal Stability**: The series is designed to have high thermal stability. This means that the electrical characteristics of the components remain relatively constant over a wide range of operating temperatures. In applications where the device may be exposed to high - temperature environments, such as automotive electronics or industrial control systems, the thermal stability ensures reliable performance and reduces the risk of component failure due to temperature variations.
## Applications
### Audio Amplification
The high current gain and good frequency response of the MJE243G series make it an ideal choice for audio amplifier circuits. In home audio systems, these transistors can be used to amplify the low - level audio signals from sources such as CD players or smartphones to a level that can drive speakers. They can also be found in professional audio equipment, such as mixing consoles and power amplifiers, where accurate signal amplification and low distortion are critical for high - quality sound reproduction.
### Power Supply Circuits
In power supply circuits, the low collector - emitter saturation voltage of the MJE243G transistors helps in improving the efficiency of the power conversion process. They can be used as switching elements in DC - DC converters, where they control the flow of current to regulate the output voltage. Additionally, in linear power supplies, these transistors can be used to provide voltage regulation and current limiting functions, ensuring a stable and reliable power supply for electronic devices.
### Signal Switching
The fast switching speed and good electrical characteristics of the MJE243G series make it suitable for signal switching applications. In communication systems, these transistors can be used to switch between different signal paths, allowing for the routing of signals to different parts of the circuit. They can also be used in test and measurement equipment, where they can be used to switch between different input signals or measurement ranges.
## Quality and Reliability
Images for reference
MJE703G
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