The BF472 is a PNP high-voltage transistor designed for stable amplification in negative high-voltage circuits. This article explains the BF472 pinout, key features, datasheet specifications, working principle, applications, and suitable alternatives, giving a complete technical overview.
Introduction
The BF472 is a high-voltage PNP bipolar junction transistor intended for low-current voltage amplification and signal processing tasks. It is widely used in analog stages, audio preamplifiers, and industrial electronics where high negative voltage handling and dependable thermal stability are required.
Pin Configuration / Pinout of BF472 Transistor
Understanding the BF472 Pinout Configuration
The BF472 is available in a TO-126 package and follows an E-C-B pin configuration when viewed from the front:
| Pin# | Pin Name |
|---|---|
| 1 | Emitter |
| 2 | Collector |
| 3 | Base |
Correct identification of the BF472 pinout is essential to ensure safe biasing and reliable circuit operation.
Note: DATASHEET DOWNLOAD button is provided end of this article.
BF472 Key Features
- PNP high-voltage bipolar transistor
- Designed for voltage amplification stages
- Stable thermal performance in TO-126 package
- Medium-frequency operation capability
- Low collector current handling
- Suitable for audio and industrial analog circuits
BF472 Specifications/Characteristics
- Collector-Emitter Voltage (Vceo): −300V
- Collector-Base Voltage (Vcbo): −300V
- Emitter-Base Voltage (Vebo): −5V
- Collector Current (Ic): −50mA
- Peak Collector Current (Icm): −100mA
- Total Power Dissipation (Ptot): 1.8W
- Junction Temperature (Tj): 150°C
- Storage Temperature (Tstg): −65°C to 150°C
- DC Current Gain (hFE): 50
- Transition Frequency (fT): 60MHz
Key Applications of BF472 Transistor
- High-voltage amplifier stages
- Audio preamplifier circuits
- Signal conditioning and voltage amplification
- Industrial control electronics
- Power supply driver and regulation stages
BF472 Equivalent / Alternatives
(Verify pin compatibility before using substitutions)
Equivalent Transistors:
- BF470
Alternative Transistors:
- BF459
- MJE350
More Circuit Layouts
Working Principle of BF472
The BF472 operates as a current-controlled PNP transistor, where a small base current controls a larger emitter-to-collector current. When the base-emitter junction is forward biased relative to the emitter, charge carriers flow and enable signal amplification. Its high-voltage capability allows reliable operation in negative high-voltage environments.
Frequently Asked Questions (FAQ)
Q1: What type of transistor is BF472?
BF472 is a PNP high-voltage bipolar junction transistor.
Q2: What is the maximum voltage rating of BF472?
The BF472 supports up to −300V collector-emitter voltage.
Q3: What is the BF472 pin configuration?
The BF472 uses an E-C-B pinout in a TO-126 package.
Q4: Can BF472 be used in audio circuits?
Yes, it is suitable for audio preamplifier and voltage amplification applications.
Conclusion
The BF472 PNP high-voltage transistor is a reliable solution for negative-voltage amplification and signal processing applications. With strong voltage tolerance, stable electrical characteristics, and a compact TO-126 package, it is well suited for audio, industrial, and high-voltage analog circuit designs.
Datasheet of BF472 Transistor
Click the following Button below to download the datasheet of BF472 :
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