Infineon BC858CE6327HTSA1 PNP General-Purpose Transistor: Datasheet, Applications, and SOT-23 Package Overview

The Infineon BC858CE6327HTSA1 is a PNP bipolar junction transistor (BJT) that stands as a fundamental building block in modern electronic circuit design. Renowned for its reliability and performance in general-purpose amplification and switching applications, this transistor is a go-to component for engineers and hobbyists alike. This article provides a comprehensive overview of its datasheet specifications, primary use cases, and the advantages of its compact SOT-23 package.

Datasheet Key Specifications and Characteristics

The electrical characteristics of the BC858CE6327HTA1 make it suitable for a wide array of low-power circuits. Key parameters from its datasheet include:

Polarity: PNP

Collector-Emitter Voltage (VCEO): -30 V

Collector Current (IC): -100 mA

DC Current Gain (hFE): Ranges from 125 to 800 (depending on the specific grouping, with the 'C' suffix typically indicating a gain range of 420-800), ensuring high amplification capability.

Power Dissipation (Ptot): 250 mW

Transition Frequency (fT): Typically 100 MHz, making it capable of handling high-speed switching and RF amplification tasks.

Low Noise Figure: This characteristic is crucial for pre-amplifier stages in audio and signal processing equipment where signal integrity is paramount.

Primary Applications and Circuit Uses

The BC858CE6327HTSA1 is exceptionally versatile. Its primary function is to control or amplify current in a circuit. Common applications include:

Signal Amplification: Used in audio pre-amplifiers, sensor interfaces, and other stages where a small analog signal needs to be boosted with high fidelity.

Switching Loads: Efficiently drives relays, LEDs, and other small loads from the output of microcontrollers or logic ICs, acting as a solid-state switch.

Digital Logic Inversion: As a PNP device, it is perfectly suited for constructing simple inverting stages in logic circuits.

Current Mirroring: Often employed in current mirror configurations to provide stable bias currents for other parts of an analog circuit.

Darlington Pair Configurations: Can be paired with an NPN transistor to create a high-gain Darlington pair for sensitive trigger circuits.

SOT-23 Package Overview

The device is housed in a SOT-23 surface-mount device (SMD) package. This package is a significant factor in its widespread adoption due to several key advantages:

Extremely Compact Size: Its small footprint (approximately 2.9 x 2.4 x 1.1 mm) is ideal for high-density PCB designs, allowing for miniaturization of end products.

Suitability for Automated Assembly: The SOT-23 package is optimized for pick-and-place machines and reflow soldering processes, which streamlines high-volume manufacturing.

Good Thermal and Electrical Performance: Despite its size, the package offers effective leads for heat dissipation and reliable electrical connections.

ICGOODFIND Summary

The Infineon BC858CE6327HTSA1 is a highly reliable and versatile PNP transistor that excels in general-purpose amplification and switching roles. Its robust electrical characteristics, including a high current gain and a transition frequency of 100 MHz, coupled with the space-saving and manufacturing-friendly SOT-23 package, make it an excellent choice for a vast spectrum of electronic designs, from consumer audio products to industrial control systems.

Keywords: PNP Transistor, General-Purpose Amplification, SOT-23 Package, High Current Gain, Switching Applications