Taiwan Semiconductor

BC817-25

BC817-25 Description

The BC817-25 is an NPN bipolar junction transistor (BJT) manufactured by Taiwan Semiconductor Corporation, designed for high-performance switching and amplification applications. Packaged in a compact SOT-23 surface-mount form factor, it offers a collector-emitter voltage (Vce) rating of 45V and a maximum collector current (Ic) of 500mA, making it suitable for low-to-medium power circuits. With a transition frequency of 100MHz, it ensures efficient high-frequency operation, while its low Vce saturation voltage (700mV @ 50mA, 500mA) minimizes power dissipation. The device is RoHS3 compliant and REACH unaffected, aligning with modern environmental standards.

BC817-25 Features

• High Current Gain (hFE): 160 @ 100mA, 1V, ensuring reliable signal amplification.
• Low Leakage Current: 100nA (ICBO) max, enhancing efficiency in precision circuits.
• Optimized for Surface Mount: Tape & Reel (TR) packaging for automated assembly.
• Wide Operating Range: 45V breakdown voltage and 500mA current handling for versatile use.
• Low Saturation Voltage: 700mV @ 500mA, reducing heat generation in switching applications.
• High Transition Frequency: 100MHz, ideal for RF and fast-switching circuits.

BC817-25 Applications

The BC817-25 excels in:

• Signal Amplification: Audio preamps, sensor interfaces, and low-noise analog circuits.
• Switching Circuits: Relay drivers, LED drivers, and power management systems.
• High-Frequency Designs: RF modules, oscillators, and communication devices.
• Portable Electronics: Battery-operated devices due to low leakage and efficient power handling.
• Automotive & Industrial Systems: Robust performance in harsh environments.

Conclusion of BC817-25

The BC817-25 stands out as a high-reliability, general-purpose NPN transistor with balanced performance in switching and amplification. Its low saturation voltage, high current gain, and compact SOT-23 package make it a preferred choice for modern electronics. Whether in consumer electronics, automotive systems, or industrial controls, this transistor delivers efficiency, durability, and compliance with global standards. For engineers seeking a cost-effective, high-performance BJT, the BC817-25 is a compelling solution.