Overview
The BC557BTAR is a PNP silicon planar epitaxial transistor produced by OnSemi. It is designed for use in various electronic circuits, particularly in driver and output stages of audio amplifiers, low noise input stages of tape recorders, Hi-Fi amplifiers, and signal processing circuits of television receivers. This transistor is known for its low noise and high current gain, making it suitable for applications requiring amplification, switching, or voltage regulation.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Transistor Polarity | PNP | |
| Continuous Collector Current | 100 | mA |
| Transistor Case Style | TO-92 | |
| No. of Pins | 3 | |
| DC Current Gain (hFE) Min | 200 | |
| Collector Emitter Voltage Max (Vce) | 45 | V |
| Power Dissipation | 625 | mW |
| Transition Frequency (ft) | 150 | MHz |
| Operating Temperature Max | 150 | °C |
| Junction to Ambient Thermal Resistance | 250 | °C/W |
Key Features
- Low noise and high current gain, suitable for amplification and switching applications.
- PNP silicon planar epitaxial transistor.
- Low current and low voltage operation.
- TO-92 package with 3 pins.
- High transition frequency of 150 MHz.
- Maximum collector-emitter voltage of 45V.
- Maximum collector current of 100mA.
Applications
- Driver stages of audio amplifiers.
- Low noise input stages of tape recorders and Hi-Fi amplifiers.
- Signal processing circuits of television receivers.
- General purpose and switching applications.
- Relay drivers and LED drivers.
- Darlington pair configurations.
Q & A
- What is the transistor polarity of the BC557BTAR?
The BC557BTAR is a PNP transistor. - What is the maximum collector current of the BC557BTAR?
The maximum collector current is 100mA. - What is the maximum collector-emitter voltage of the BC557BTAR?
The maximum collector-emitter voltage is 45V. - What is the transition frequency of the BC557BTAR?
The transition frequency is 150 MHz. - What is the operating temperature range of the BC557BTAR?
The maximum operating temperature is 150°C. - What are the typical applications of the BC557BTAR?
Typical applications include driver stages of audio amplifiers, low noise input stages, and signal processing circuits. - What is the package style of the BC557BTAR?
The BC557BTAR comes in a TO-92 package with 3 pins. - What is the DC current gain (hFE) of the BC557BTAR?
The minimum DC current gain (hFE) is 200. - How much power can the BC557BTAR dissipate?
The maximum power dissipation is 625 mW. - What is the thermal resistance of the BC557BTAR?
The junction to ambient thermal resistance is 250°C/W.
