Infineon BC856SH6327 PNP General-Purpose Transistor: Datasheet, Application Circuit, and SOT-363 Package Analysis
The Infineon BC856SH6327 is a high-performance PNP bipolar junction transistor (BJT) designed for general-purpose amplification and switching applications. As a part of Infineon's robust portfolio of small-signal transistors, this device is optimized for use in a wide range of electronic equipment, including audio amplifiers, signal processing circuits, and interface modules. Its combination of high current gain, low saturation voltage, and an ultra-small package makes it an excellent choice for space-constrained and power-sensitive designs.
A thorough examination of the datasheet reveals the key electrical characteristics that define this component. The BC856SH6327 boasts a collector-emitter voltage (VCE) of -65 V and a continuous collector current (IC) of -100 mA, providing sufficient headroom for many low-power circuits. Its DC current gain (hFE) is notably high, ranging from 125 to 800 at a collector current of -2 mA, ensuring effective signal amplification with minimal input current. Furthermore, the device exhibits a low collector-emitter saturation voltage (VCE(sat)), typically around -0.5 V at IC = -10 mA, which is critical for efficient switching operations, minimizing power loss and heat generation.
The transistor is housed in the SOT-363 (SC-88) package, a miniature 6-pin plastic package that is extremely popular in modern consumer electronics. This package is particularly valued for its exceptionally small footprint on the printed circuit board (PCB), measuring approximately 2.2 x 2.0 mm. Despite its size, the SOT-363 package offers significant advantages. It contains two separate transistors in one package, providing designers with a compact solution for differential amplifier pairs or complementary circuits. The small outline also contributes to improved high-frequency performance by reducing parasitic inductance and capacitance.
A common application circuit for the BC856SH6327 is a class A audio amplifier stage. In this configuration, the transistor is biased in its active region to faithfully amplify small audio signals from a microphone or pickup. The high current gain of the BC856SH6327 allows for a simple biasing network, while its linear response ensures low distortion in the output signal. Another frequent use is as a low-side switch for driving LEDs or small relays. Here, the low VCE(sat) ensures that most of the supply voltage is dropped across the load, enhancing efficiency. The ability to switch 100 mA makes it suitable for interfacing between microcontrollers and higher-power peripherals.
When designing with this transistor, careful attention must be paid to power dissipation. The SOT-363 package has a maximum total power dissipation of approximately 250 mW. Exceeding this limit without proper PCB layout for heat sinking can lead to thermal runaway and device failure. Therefore, for applications involving higher currents, calculating power dissipation (IC VCE) is essential to ensure reliable operation.
ICGOODFIND: The Infineon BC856SH6327 stands out as a highly versatile and efficient PNP transistor, perfectly suited for modern electronics demanding miniaturization and performance. Its excellent amplification capabilities, efficient switching characteristics, and the space-saving advantages of the SOT-363 package make it a superior choice for designers across a spectrum of applications, from portable audio devices to sophisticated control systems.
Keywords: PNP Transistor, General-Purpose Amplification, SOT-363 Package, Low Saturation Voltage, High Current Gain.
