Overview
The BC859B is a PNP general-purpose transistor manufactured by Fairchild Semiconductor, now part of ON Semiconductor. This transistor is housed in a SOT23 plastic package and is designed for a variety of applications, including low noise input stages and general-purpose amplifier and switching circuits. It is AEC-Q101 qualified, making it suitable for automotive and other demanding environments.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Package | SOT23 | - |
| Collector-Base Voltage (VCBO) | -30 | V |
| Collector-Emitter Voltage (VCEO) | -30 | V |
| Collector Current (IC) | 100 | mA |
| Total Power Dissipation (Ptot) | 250 | mW |
| Current Gain (hFE) | 220 - 475 | - |
| Current Gain Bandwidth Product (fT) | 100 | MHz |
| Noise Figure | 1.2 (at 30 Hz - 15 kHz) | dB |
| Polarity | PNP | - |
Key Features
- Low noise characteristics, making it suitable for audio frequency input stages.
- AEC-Q101 qualified, ensuring reliability in automotive and other harsh environments.
- High current gain (hFE) with a range of 220 to 475.
- Low collector-emitter saturation voltage.
- Small SOT23 package, ideal for surface mount applications.
- Complementary NPN transistors available (BC849 and BC850).
- Lead-free and RoHS compliant.
Applications
- Low noise input stages of audio frequency equipment.
- General-purpose amplifier and switching circuits.
- Automotive applications due to AEC-Q101 qualification.
- Thin and thick-film circuits.
- Consumer and industrial electronics where low noise and high reliability are required.
Q & A
- What is the package type of the BC859B transistor?
The BC859B transistor is housed in a SOT23 plastic package.
- What is the maximum collector current of the BC859B transistor?
The maximum collector current is 100 mA.
- What is the maximum collector-emitter voltage of the BC859B transistor?
The maximum collector-emitter voltage is -30 V.
- Is the BC859B transistor AEC-Q101 qualified?
Yes, the BC859B transistor is AEC-Q101 qualified.
- What are the complementary NPN transistors for the BC859B?
The complementary NPN transistors are BC849 and BC850.
- What is the noise figure of the BC859B transistor?
The noise figure is 1.2 dB at frequencies between 30 Hz and 15 kHz.
- What is the total power dissipation of the BC859B transistor?
The total power dissipation is 250 mW.
- Is the BC859B transistor lead-free and RoHS compliant?
Yes, the BC859B transistor is lead-free and RoHS compliant.
- What are some typical applications of the BC859B transistor?
Typical applications include low noise input stages, general-purpose amplifier and switching circuits, and automotive applications.
- What is the current gain bandwidth product (fT) of the BC859B transistor?
The current gain bandwidth product (fT) is 100 MHz.
