NJW0302G Transistor | Datasheet | Amplifier Circuit | Equivalent onsemi

bipolar transistor NJW0302G

NJW0302G amplifier circuit

NJW0302G an actual picture

The NJW0302G is a high performance PNP type bipolar power transistor with high reliability and very low distortion. It is mainly used as an amplifier and power switching device.

NJW0302G Circuit Diagram

I will use an audio amplification example to explain the working principle of the NJW0302G as follows.
1. The audio signal is output from the audio source device and enters the audio power amplifier to find the circuit where the NJW0302G is located.
2. Weak audio signals first by other small components of the circuit initial organization and amplification.
3. NJW0302G greatly changes the collector current according to the base signal change to amplify the audio signal.
4. Amplified signal from the collector output, into the next link.
5. The amplified signal drives the speaker cone to vibrate, converting the electrical signal into sound.

Class B amplifier Circuit

The NJW0302G is often used in conjunction with the NJW0281G to combine to form a Class B amplifier. When the input signal is positive, the NJW0302G begins to conduct and amplifies the positive half-cycle signal. When the input signal is negative, the NJW0281G starts to conduct and amplifies the negative half-cycle signal. The two transistors work alternately, each amplifying only one half-cycle.

NJW0302G Equivalent

The NJW0302G is a high-power transistor from onsemi, widely used in power amplifier and switching applications. This table compares the NJW0302G with several equivalent transistors from other manufacturers, including TIP142, BDX53C, 2N5551, MJE2955, and S8050. Key specifications like voltage rating, current rating, gain, and power dissipation are highlighted to help in selecting the best equivalent part for specific use cases.

圖片	電晶體	製造商	封裝類型	Voltage Rating	Current Rating	Gain (hFE)	Power Dissipation
	NJW0302G	安森美	TO-220-2	60伏	15A	20-60	80瓦
	提示142	安森美	TO-220-2	100伏	12A	50-150	80瓦
	BDX53C	意法半導體	TO-220-2	80伏	15A	50-150	80瓦
	2N5551	安森美	TO-220-2	60伏	15A	20-120	80瓦
	MJE2955	安森美半導體	TO-220-2	60伏	15A	40-120	80瓦
	S8050	Sanken Electric	TO-220-2	60伏	10A	30-100	70W

The NJW0302G offers a balance of high current rating (15A) and moderate voltage rating (60V), with a power dissipation capacity of 80W. By comparing it with alternatives like the TIP142, BDX53C, and others, users can determine the most suitable replacement based on their application’s requirements, including voltage, current, and gain considerations. Always choose an equivalent that best matches the performance needs of your circuit design.