Overview
The BC857A is a PNP bipolar junction transistor (BJT) manufactured by Diotec Semiconductor. It is designed for control and signal processing applications. This transistor is packaged in a SOT-23 case, making it suitable for a wide range of electronic devices where space is limited. The BC857A operates with a collector-base voltage of up to 45V, a collector current of 100mA, and a power dissipation of 250mW. It has a junction temperature rating of 150°C, ensuring reliability in various operating conditions.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Transistor Type | PNP BJT | |
| Package | SOT-23 | |
| Collector-Base Voltage (VCB0) | 45 | V |
| Collector-Emitter Voltage (VCE0) | 45 | V |
| Emitter-Base Voltage (VEB0) | -5 | V |
| Collector Current (IC) | 100 | mA |
| Power Dissipation (PC) | 250 | mW |
| Junction Temperature (TJ) | 150 | °C |
| Storage Temperature (TSTG) | -65 to 150 | °C |
| Current Gain (hFE) | 110 to 800 | |
| Collector-Emitter Saturation Voltage (VCE(sat)) | -90 to -300 mV | mV |
| Base-Emitter Saturation Voltage (VBE(sat)) | -700 to -900 mV | mV |
Key Features
- Compact SOT-23 Package: Ideal for space-constrained applications.
- High Reliability: Operates up to 150°C junction temperature.
- Low Noise Figure: Suitable for applications requiring low noise.
- RoHS and REACH Compliant: Environmentally friendly and compliant with regulatory standards.
- Wide Operating Voltage Range: Collector-base voltage up to 45V and collector-emitter voltage up to 45V.
Applications
The BC857A transistor is versatile and can be used in a variety of applications, including:
- Control and Signal Processing: Suitable for general-purpose switching and amplification.
- LED Driver Circuits: Can be used in dimmable LED driver circuits due to its low saturation voltage and high current gain.
- Robotics and Automation: Used in dynamic robot models and other automated systems.
- Consumer Electronics: Applicable in various consumer electronic devices where compact size and reliability are crucial.
Q & A
- What is the package type of the BC857A transistor?
The BC857A transistor is packaged in a SOT-23 case. - What is the maximum collector current of the BC857A?
The maximum collector current is 100mA. - What is the junction temperature rating of the BC857A?
The junction temperature rating is 150°C. - Is the BC857A RoHS and REACH compliant?
Yes, the BC857A is RoHS and REACH compliant. - What are the typical applications of the BC857A transistor?
The BC857A is used in control and signal processing, LED driver circuits, robotics, and various consumer electronics. - What is the collector-emitter voltage rating of the BC857A?
The collector-emitter voltage rating is up to 45V. - What is the power dissipation of the BC857A transistor?
The power dissipation is 250mW. - What is the storage temperature range for the BC857A?
The storage temperature range is -65 to 150°C. - What is the current gain (hFE) of the BC857A transistor?
The current gain (hFE) ranges from 110 to 800. - Can the BC857A be used in high-temperature environments?
Yes, it can operate up to a junction temperature of 150°C.
