BC547CTAR

The BC547CTAR is a general-purpose NPN bipolar junction transistor (BJT) manufactured by ON Semiconductor. It is widely used in various electronic applications due to its versatility and reliability. Here’s a detailed description of its key features and specifications:

Physical Characteristics:

• Package Type: The BC547CTAR is typically available in a TO-92 package, which is a cylindrical plastic housing with three leads extending from the bottom. This package is compact and suitable for through-hole mounting on printed circuit boards (PCBs).
• Lead Configuration: The three leads are arranged in a specific order: the emitter (E), base (B), and collector (C). The standard pinout for the TO-92 package is E-B-C when viewed from the flat side of the transistor.

Electrical Specifications:

• Maximum Collector-Emitter Voltage (Vce): The BC547CTAR can handle a maximum voltage of 45V between the collector and emitter, making it suitable for a variety of low to moderate voltage applications.
• Maximum Collector Current (Ic): It has a maximum collector current rating of 100mA, allowing it to drive small loads effectively.
• DC Current Gain (hFE): The transistor exhibits a current gain (hFE) ranging from 110 to 800, depending on the specific operating conditions. This high gain makes it efficient for amplification purposes.
• Transition Frequency (fT): The BC547CTAR has a transition frequency of approximately 250 MHz, indicating its capability for high-frequency applications.

Thermal Characteristics:

• Junction Temperature (Tj): The maximum junction temperature is rated at 150°C, which provides a good thermal margin for operation in various environments.
• Thermal Resistance: The thermal resistance from junction to ambient is relatively low, allowing for effective heat dissipation during operation.

Applications:

The BC547CTAR is commonly used in:

• Amplification: It is ideal for audio and radio frequency amplification due to its high gain and frequency response.
• Switching: The transistor can be used as a switch in low-power applications, controlling devices such as relays, LEDs, and small motors.
• Signal Processing: It is suitable for signal processing tasks in various electronic circuits.

Additional Features:

• RoHS Compliance: The BC547CTAR is compliant with the Restriction of Hazardous Substances (RoHS) directive, ensuring it is free from certain hazardous materials.
• Lead-Free: The device is available in lead-free versions, making it suitable for environmentally friendly applications.

Conclusion:

The BC547CTAR from ON Semiconductor is a reliable and versatile NPN transistor that is widely used in electronic circuits for amplification and switching applications. Its robust specifications, compact package, and compliance with environmental standards make it a popular choice among engineers and hobbyists alike.