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BC857B

Name: BC857B
Rating: 4.7 (12 reviews)

TRANS PNP 45V 0.1A SOT23-3

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製造商。部分 #BC857B
包 P-SOT23-3-3
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規格

Package	Tape & Reel (TR),Cut Tape (CT)
ProductStatus	Obsolete
TransistorType	PNP
Current-Collector(Ic)(Max)	100 mA
Voltage-CollectorEmitterBreakdown(Max)	45 V
VceSaturation(Max)@IbIc	650mV @ 5mA, 100mA
Current-CollectorCutoff(Max)	15nA (ICBO)
DCCurrentGain(hFE)(Min)@IcVce	220 @ 2mA, 5V
Power-Max	250 mW
Frequency-Transition	100MHz
OperatingTemperature	150°C (TJ)
MountingType	Surface Mount
Package/Case	TO-236-3, SC-59, SOT-23-3

概述

Description

The BC857B is a general-purpose, low-noise PNP bipolar junction transistor (BJT) designed for various electronic applications, including amplification and switching. It is part of the BC series of transistors and is known for its compact size and reliable performance.
Key specifications include a maximum collector current (Ic) of 100 mA, a collector-emitter voltage (Vce) of 45 V, and a gain (hFE) ranging between 110 and 800, depending on the current level. The BC857B is frequently used in audio applications, signal processing, and as a driver for low-power loads.
It features a TO-92 package, making it suitable for through-hole mounting in circuit boards. The device is particularly valued for its low noise characteristics and high gain, making it ideal for amplifying weak signals in sensitive applications.
Overall, the BC857B is a versatile and widely used component in electronics, appreciated for its efficiency and reliability in various circuit designs.

Features

The BC857B is a NPN bipolar junction transistor (BJT) featuring the following key characteristics:
1. Type: NPN transistor.
2. Voltage Rating: Collector-emitter voltage (Vce) up to 45V.
3. Current Rating: Maximum collector current (Ic) of 100mA.
4. Gain: High current gain (hFE) typically ranging from 100 to 600, enhancing amplification capabilities.
5. Package: Available in a SOT-23 package for compact designs.
6. Frequency Response: Transition frequency (ft) around 150 MHz, suitable for high-frequency applications.
7. Applications: Commonly used in low-power switching and amplification, audio applications, and signal processing.
8. Thermal Characteristics: Junction temperature range from -55°C to +150°C, providing reliability in various environments.
The BC857B is versatile and ideal for applications requiring moderate power levels and high efficiency.

Package

The BC857B is typically packaged in a SOT-23 (Small Outline Transistor) format. This surface-mount package is compact, making it suitable for various electronic applications, including amplifiers and switching circuits.

Pinout

The BC857B is a PNP bipolar junction transistor (BJT) commonly used for switching and amplification purposes. It has a total of three pins, which are designated as follows:
1. Emitter (E) - Pin 1
2. Base (B) - Pin 2
3. Collector (C) - Pin 3
In operation, the emitter is connected to a higher voltage, the base is used to control the transistor's on/off state, and the collector is where the output current flows. The BC857B can handle a maximum collector current of 100 mA and a collector-emitter voltage (Vce) of 45 V. It is widely used in various electronic circuits due to its low noise characteristics and high gain properties.

Manufacturer

The BC857B is manufactured by various semiconductor companies, with Nexperia and ON Semiconductor being among the prominent producers. Nexperia, a spinoff from Philips, specializes in discrete, logic, and MOSFET components, focusing on high-volume manufacturing and automotive applications. ON Semiconductor, on the other hand, offers a wide range of semiconductor solutions, including power management, analog, and logic devices, serving various sectors such as automotive, industrial, and consumer electronics. Both companies are recognized for their commitment to quality and innovation in the semiconductor industry.

Application

The BC857B is a PNP bipolar junction transistor commonly used in various applications, including switching, amplification, and signal processing. It is suited for low-power applications in audio equipment, consumer electronics, and signal modulation. Additionally, it can be used in analog circuits, such as in amplifiers and oscillators, as well as in low-side switching for motors and relays in automation projects. Its low noise and high gain characteristics make it ideal for interfacing with various electronic components.

Equivalent

The BC857B is a general-purpose PNP bipolar junction transistor. Equivalent products include the 2N2907, MPS2222, and BC558. Always verify specifications like current rating and voltage to ensure compatibility in your application.