Overview
The SO642 is a small signal NPN bipolar junction transistor (BJT) manufactured by STMicroelectronics. It is designed for high-voltage applications and is packaged in a SOT23-3 format, making it suitable for a variety of electronic circuits where space is limited. This transistor is known for its reliability and performance in high-voltage environments.
Key Specifications
| Parameter | Value |
|---|---|
| Transistor Type | NPN |
| Current - Collector (Ic) (Max) | 100 mA |
| Voltage - Collector Emitter Breakdown (Max) | 300 V |
| Operating Temperature (TJ) | 150°C |
| Package | SOT23-3 |
| Transition Frequency | 50 MHz |
Key Features
- High voltage capability: The SO642 can handle up to 300V collector-emitter breakdown voltage, making it suitable for high-voltage applications.
- Small package: The SOT23-3 package is compact, ideal for space-constrained designs.
- High transition frequency: With a transition frequency of 50 MHz, this transistor is suitable for high-frequency applications.
- Reliable operation: The transistor operates reliably up to a junction temperature of 150°C.
Applications
The SO642 is versatile and can be used in various applications, including:
- High-voltage switching circuits
- Amplifier stages in audio and RF circuits
- Power supply circuits
- Automotive and industrial control systems
Q & A
- What is the maximum collector current of the SO642 transistor?
The maximum collector current of the SO642 transistor is 100 mA. - What is the maximum collector-emitter breakdown voltage of the SO642?
The maximum collector-emitter breakdown voltage is 300 V. - What is the package type of the SO642 transistor?
The SO642 transistor is packaged in a SOT23-3 format. - What is the operating temperature range of the SO642 transistor?
The operating temperature range is up to 150°C (TJ). - What is the transition frequency of the SO642 transistor?
The transition frequency is 50 MHz. - Is the SO642 transistor suitable for high-frequency applications?
Yes, the SO642 transistor is suitable for high-frequency applications due to its high transition frequency. - What are some common applications of the SO642 transistor?
The SO642 transistor is commonly used in high-voltage switching circuits, amplifier stages, power supply circuits, and automotive and industrial control systems. - Is the SO642 transistor still in production?
No, the SO642 transistor is listed as obsolete by some suppliers. - Where can I find detailed specifications for the SO642 transistor?
Detailed specifications can be found on the datasheets available from suppliers like Digi-Key, Mouser, and the official STMicroelectronics website. - What makes the SO642 transistor reliable in high-voltage applications?
The SO642 transistor's reliability in high-voltage applications is due to its high collector-emitter breakdown voltage and its ability to operate at high temperatures.
