BC857BR TR

Product Overview

Use

It is commonly used in amplification and switching applications in electronic circuits.

Characteristics

Low power dissipation
High current gain
Low noise

Package

The BC857BR TR comes in a SOT-23 package.

Essence

This transistor is essential for amplifying weak signals and controlling larger currents in electronic devices.

Packaging/Quantity

It is typically available in reels containing 3000 units.

Specifications

Collector-Base Voltage (VCBO): 45V
Collector-Emitter Voltage (VCEO): 45V
Emitter-Base Voltage (VEBO): 5V
Collector Current (IC): 100mA
Power Dissipation (PD): 250mW
Transition Frequency (fT): 100MHz

Detailed Pin Configuration

The BC857BR TR has three pins: 1. Emitter (E) 2. Base (B) 3. Collector (C)

Functional Features

High current gain
Low saturation voltage
Fast switching speed

Advantages

Small size
Low power consumption
Wide operating temperature range

Disadvantages

Limited maximum collector current
Relatively low breakdown voltage

Working Principles

The BC857BR TR operates based on the principles of bipolar junction transistors, where the flow of current is controlled by the application of a small input signal at the base terminal.

Detailed Application Field Plans

This transistor is widely used in audio amplifiers, signal processing circuits, and voltage regulators due to its high gain and low noise characteristics.

Detailed and Complete Alternative Models

Some alternative models to the BC857BR TR include: - BC847BR - BC856BR - 2N3904 - 2N4401

In conclusion, the BC857BR TR is a versatile small signal transistor with various applications in electronic circuits, offering high current gain and low power dissipation. Its compact size and functional features make it suitable for a wide range of amplification and switching tasks. However, users should be mindful of its limitations, such as the relatively low breakdown voltage and limited maximum collector current.

技術ソリューションにおける BC857BR TR の適用に関連する 10 件の一般的な質問と回答をリストします。

What is the BC857BR TR transistor used for?
- The BC857BR TR is a general-purpose PNP transistor commonly used in amplification and switching applications.
What are the key specifications of the BC857BR TR transistor?
- The BC857BR TR has a maximum collector current of 100mA, a maximum collector-base voltage of 45V, and a maximum power dissipation of 250mW.
Can the BC857BR TR be used for audio amplification?
- Yes, the BC857BR TR can be used for small-signal audio amplification due to its low noise and high gain characteristics.
Is the BC857BR TR suitable for low-power switching applications?
- Yes, the BC857BR TR is commonly used in low-power switching circuits due to its moderate current and voltage ratings.
What are the typical operating conditions for the BC857BR TR?
- The BC857BR TR operates within a temperature range of -55°C to 150°C and is typically used in low to moderate frequency applications.
Can the BC857BR TR be used in battery-powered devices?
- Yes, the BC857BR TR's low power dissipation makes it suitable for use in battery-powered devices where power efficiency is crucial.
Does the BC857BR TR require a heat sink for normal operation?
- In most applications, the BC857BR TR does not require a heat sink due to its moderate power dissipation characteristics.
What are the common alternatives to the BC857BR TR?
- Common alternatives to the BC857BR TR include the BC557B and 2N3906 transistors, which are also PNP general-purpose transistors.
Can the BC857BR TR be used in high-frequency applications?
- While the BC857BR TR can operate at moderate frequencies, it may not be suitable for high-frequency applications due to its transition frequency limitations.
Are there any special considerations for PCB layout when using the BC857BR TR?
- It's important to minimize lead lengths and keep input and output traces short to reduce parasitic effects when incorporating the BC857BR TR into a PCB design.