BC817-25

The BC817-25 is a versatile NPN bipolar junction transistor (BJT) manufactured by DIOTEC, commonly used in various electronic applications. Here’s a detailed description of its characteristics and specifications:

General Description:

The BC817-25 is designed for low to medium power switching and amplification applications. It is particularly favored for its high-speed performance and efficiency in low-voltage circuits. The transistor is encapsulated in a compact plastic package, typically in a TO-92 form factor, which makes it suitable for both through-hole and surface mount applications.

Key Specifications:

• Type: NPN Transistor
• Package: TO-92
• Maximum Collector-Emitter Voltage (Vce): 45V
• Maximum Collector Current (Ic): 500mA
• Maximum Power Dissipation (Pd): 500mW
• DC Current Gain (hFE): Ranges from 100 to 800, depending on the collector current.
• Transition Frequency (fT): Approximately 100 MHz, indicating its suitability for high-frequency applications.
• Operating Temperature Range: Typically from -55°C to +150°C, allowing for use in various environmental conditions.

Electrical Characteristics:

• Collector-Base Breakdown Voltage (V(BR)CBO): 50V
• Emitter-Base Breakdown Voltage (V(BR)EBO): 5V
• Base-Emitter Voltage (Vbe): Typically around 0.7V when in the active region.
• Saturation Voltage (Vce(sat)): Low saturation voltage, typically around 0.2V at a collector current of 100mA, which enhances efficiency in switching applications.

Applications:

The BC817-25 is widely used in:

• Signal amplification in audio and radio frequency applications.
• Switching applications in power management circuits.
• Driver stages for relays, LEDs, and other loads.
• General-purpose amplification in consumer electronics.

Features:

• High Gain: The transistor's high current gain allows for effective amplification with minimal input current.
• Low Noise: It operates with low noise levels, making it suitable for audio and sensitive signal applications.
• Robustness: The device is designed to withstand a range of operating conditions, ensuring reliability in various applications.

Conclusion:

The BC817-25 from DIOTEC is a reliable and efficient NPN transistor that serves a wide range of electronic applications. Its combination of high voltage and current ratings, along with its compact size and versatility, makes it a popular choice among engineers and hobbyists alike. Whether used in switching circuits or as an amplifier, the BC817-25 provides excellent performance and durability.