Diotec Semiconductor Tariff Inquiry

BC857C

BC857C Description

The BC857C from Diotec Semiconductor is a PNP bipolar junction transistor (BJT) housed in a compact SOT-23 surface-mount package. Designed for general-purpose amplification and switching applications, it offers a collector-emitter voltage (Vce) rating of 45V and a maximum collector current (Ic) of 100mA. With a transition frequency of 100MHz, it ensures reliable performance in high-frequency circuits. The device is characterized by low leakage current (15nA ICBO) and high DC current gain (hFE min 420 @ 2mA, 5V), making it suitable for precision analog and digital designs.

BC857C Features

• Low saturation voltage: 650mV @ 5mA, 100mA, enhancing efficiency in switching applications.
• High current gain (hFE): Ensures robust signal amplification with minimal base current requirements.
• Surface-mount (SMT) compatibility: Tape & Reel (TR) packaging for automated assembly processes.
• Wide operating voltage range: Up to 45V, suitable for diverse power supply designs.
• Low power dissipation: 250mW max, ideal for energy-sensitive applications.
• RoHS non-compliant: Note that this device is not applicable for RoHS-restricted designs.

BC857C Applications

The BC857C excels in:

• Signal amplification in audio and RF circuits due to its 100MHz transition frequency.
• Low-power switching in portable electronics, sensors, and IoT devices.
• Voltage regulation and driver stages in power management systems.
• Analog and digital logic interfaces, leveraging its high hFE for impedance matching.
• Automotive and industrial control systems where moderate voltage and current handling are required.

Conclusion of BC857C

The BC857C is a versatile PNP BJT offering a balance of high gain, low saturation voltage, and compact SMT packaging. Its 45V Vce rating and 100mA Ic capability make it a reliable choice for amplification, switching, and interface applications across consumer, industrial, and automotive sectors. While not RoHS-compliant, its performance and cost-effectiveness position it as a practical solution for non-restricted designs. Engineers will appreciate its efficiency in high-frequency and low-power circuits, backed by Diotec Semiconductor’s quality assurance.