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BC857A

Name: BC857A
Rating: 4.7 (12 reviews)

TRANS PNP 45V 0.1A SOT23-3

メーカー
Mfr。パート #BC857A
パッケージ TO-236-3, SC-59, SOT-23-3
データシート BC857A DataSheet
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仕様

Package	Strip
ProductStatus	Active
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	125 @ 2mA, 5V
Power-Max	250 mW
Frequency-Transition	100MHz
OperatingTemperature	-55°C ~ 150°C (TJ)
MountingType	Surface Mount
Package/Case	TO-236-3, SC-59, SOT-23-3

概要

Description

The BC857A is a general-purpose NPN bipolar junction transistor (BJT) designed for switching and amplification applications. It is commonly used in low-power electronic circuits due to its compact size and efficiency. The BC857A features a maximum collector current of 100 mA and a maximum collector-emitter voltage of 45 V.
With a current gain (hFE) ranging from 100 to 600, it offers good performance in various amplifier configurations. The transistor comes in a small SOT-23 package, making it suitable for surface-mount technology (SMT) applications.
Typical applications include audio amplifiers, signal processing, and switching circuits in consumer electronics. Its low base-emitter saturation voltage allows for efficient operation in digital circuits.
Overall, the BC857A is a versatile component widely used in both hobbyist and professional electronic designs.

Features

The BC857A is a general-purpose NPN bipolar junction transistor (BJT) designed for low current and voltage applications. Key features include:
1. Type: NPN transistor.
2. Voltage Rating: Maximum collector-emitter voltage (Vce) of 45V.
3. Current Rating: Maximum collector current (Ic) of 100mA.
4. Gain: High current gain (hFE) typically ranging from 100 to 800.
5. Package: Available in a compact SOT-23 or similar surface-mount packages.
6. Frequency: Suitable for low to medium frequency applications, with a transition frequency (fT) around 100 MHz.
7. Switching Speed: Fast switching capabilities, making it ideal for use in signal amplification and switching applications.
8. Low Noise: Offers low noise performance, making it suitable for audio and RF applications.
Overall, the BC857A is widely used in amplifiers, oscillators, and various switching circuits due to its versatility and reliability.

Package

The BC857A is typically packaged in the SOT-23 surface-mounted device (SMD) package. It is a low-power NPN transistor commonly used in various electronic applications, including switching and amplification.

Pinout

The BC857A is a PNP bipolar junction transistor (BJT) commonly used for switching and amplification applications. It comes in a TO-92 package and has three pins with the following functions:
1. Emitter (E): This is the terminal through which current exits the transistor. In a PNP setup, the emitter is typically connected to a higher voltage.
2. Base (B): This terminal controls the transistor's operation. A small current at the base allows a larger current to flow from the emitter to the collector.
3. Collector (C): This is the terminal through which current enters the transistor. The collector current is controlled by the base current.
The BC857A is characterized by a maximum collector current of 100 mA and a maximum collector-emitter voltage of 45 V, making it suitable for various low-power applications.

Manufacturer

The BC857A is manufactured by various semiconductor companies, with Nexperia being one of the well-known producers. Nexperia specializes in discrete, logic, and MOSFET components, providing a wide range of semiconductor solutions.
Nexperia was spun off from NXP Semiconductors in 2017 and focuses on high-volume manufacturing of discrete and analog components. Other manufacturers of the BC857A may include companies like Fairchild Semiconductor, Texas Instruments, and others that produce bipolar junction transistors (BJTs).
These companies typically operate in the electronics industry, offering a variety of products for consumer electronics, automotive, industrial applications, and more, contributing to the global semiconductor supply chain.

Application

The BC857A is a PNP bipolar junction transistor primarily used in low-power amplification and switching applications. Its typical areas include audio amplification, signal processing, and interfacing with microcontrollers. It is also suitable for use in low-voltage and low-current circuits, such as in portable electronics, LED drivers, and sensor signal conditioning. Its compact size and efficiency make it ideal for consumer electronics and battery-operated devices.

Equivalent

The BC857A is a PNP bipolar junction transistor. Equivalent products include the 2N2907, 2N5087, and MPS2222A. These alternatives may have slightly different specifications, so it's essential to check their data sheets for compatibility in your specific application.