BC547B NPN Transistor: Pinout, Datasheet, and Equivalent

Sophie

Published: 29 July 2021 | Last Updated: 29 July 2021

13557

BC547B

BC547B

ON Semiconductor

BC547 Series 45 V CE Breakdown .1 A NPN Epitaxial Silicon Transistor - TO-92

Purchase Guide

BC547 Series 45 V CE Breakdown .1 A NPN Epitaxial Silicon Transistor - TO-92

The BC547B is an NPN general purpose transistor especially suited for use in driver stages of audio amplifiers, low noise input stages of tape recorders, HI-FI amplifiers, signal processing circuits of television receivers etc.

In this video I have explained the Clap switch circuit.It is simple and easy to build circuit.

Building a Clap switch Circuit (Using 555 Timer and BC547B transistor)

BC547B Description

The BC547B is an NPN general purpose transistor in TO-92 package. It is especially suited for use in driver stages of audio amplifiers, low noise input stages of tape recorders, HI-FI amplifiers, signal processing circuits of television receivers etc.


BC547B Pinout

BC547B Pinout.jpg

BC547B CAD Model

Symbol

BC547B Symbol.jpg

 

Footprint


BC547B Footprint.jpg


3D Model


BC547B 3D Model.jpg


BC547B Features

  • Type: NPN

  • Package: TO-92

  • Max DC collector current: 100 mA

  • Max collector to emitter voltage: 45 V

  • Max collector base voltage: 50 V

  • Max emitter base voltage: 6 V

  • Max power dissipation: 500 mW

  • Max operating frequency: 300 MHz

  • Collector to emitter saturation voltage: 250 mV

  • DC current gain: 110 @ Ic = 2 mA

  • Operating junction temperature range: -65°C to 150°C


Specifications

ON Semiconductor BC547B technical specifications, attributes, parameters and parts with similar specifications to ON Semiconductor BC547B.
  • Type
    Parameter
  • Lifecycle Status

    Lifecycle Status refers to the current stage of an electronic component in its product life cycle, indicating whether it is active, obsolete, or transitioning between these states. An active status means the component is in production and available for purchase. An obsolete status indicates that the component is no longer being manufactured or supported, and manufacturers typically provide a limited time frame for support. Understanding the lifecycle status is crucial for design engineers to ensure continuity and reliability in their projects.

    ACTIVE (Last Updated: 6 days ago)
  • Factory Lead Time
    6 Weeks
  • Contact Plating

    Contact plating (finish) provides corrosion protection for base metals and optimizes the mechanical and electrical properties of the contact interfaces.

    Copper, Silver, Tin
  • Mount

    In electronic components, the term "Mount" typically refers to the method or process of physically attaching or fixing a component onto a circuit board or other electronic device. This can involve soldering, adhesive bonding, or other techniques to secure the component in place. The mounting process is crucial for ensuring proper electrical connections and mechanical stability within the electronic system. Different components may have specific mounting requirements based on their size, shape, and function, and manufacturers provide guidelines for proper mounting procedures to ensure optimal performance and reliability of the electronic device.

    Through Hole
  • Mounting Type

    The "Mounting Type" in electronic components refers to the method used to attach or connect a component to a circuit board or other substrate, such as through-hole, surface-mount, or panel mount.

    Through Hole
  • Package / Case

    refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.

    TO-226-3, TO-92-3 (TO-226AA)
  • Number of Pins
    3
  • Supplier Device Package

    The parameter "Supplier Device Package" in electronic components refers to the physical packaging or housing of the component as provided by the supplier. It specifies the form factor, dimensions, and layout of the component, which are crucial for compatibility and integration into electronic circuits and systems. The supplier device package information typically includes details such as the package type (e.g., DIP, SOP, QFN), number of pins, pitch, and overall size, allowing engineers and designers to select the appropriate component for their specific application requirements. Understanding the supplier device package is essential for proper component selection, placement, and soldering during the manufacturing process to ensure optimal performance and reliability of the electronic system.

    TO-92-3
  • Weight
    200.005886mg
  • Manufacturer Package Identifier

    The Manufacturer Package Identifier is a unique code or label assigned by the manufacturer to identify a specific package or housing style of an electronic component. This identifier helps in distinguishing between different package types of the same component, such as integrated circuits, transistors, or diodes. It typically includes information about the package dimensions, lead configuration, and other physical characteristics of the component. The Manufacturer Package Identifier is crucial for ensuring compatibility and proper assembly of electronic components in various devices and circuits.

    MKT-ZA03DREV3
  • Collector-Emitter Breakdown Voltage
    45V
  • Collector-Emitter Saturation Voltage
    250mV
  • Current-Collector (Ic) (Max)
    100mA
  • Number of Elements
    1
  • hFEMin
    200
  • Operating Temperature

    The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.

    150°C TJ
  • Packaging

    Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.

    Bulk
  • Published
    2005
  • Part Status

    Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.

    Active
  • Moisture Sensitivity Level (MSL)

    Moisture Sensitivity Level (MSL) is a standardized rating that indicates the susceptibility of electronic components, particularly semiconductors, to moisture-induced damage during storage and the soldering process, defining the allowable exposure time to ambient conditions before they require special handling or baking to prevent failures

    1 (Unlimited)
  • Max Operating Temperature

    The Maximum Operating Temperature is the maximum body temperature at which the thermistor is designed to operate for extended periods of time with acceptable stability of its electrical characteristics.

    150°C
  • Min Operating Temperature

    The "Min Operating Temperature" parameter in electronic components refers to the lowest temperature at which the component is designed to operate effectively and reliably. This parameter is crucial for ensuring the proper functioning and longevity of the component, as operating below this temperature may lead to performance issues or even damage. Manufacturers specify the minimum operating temperature to provide guidance to users on the environmental conditions in which the component can safely operate. It is important to adhere to this parameter to prevent malfunctions and ensure the overall reliability of the electronic system.

    -65°C
  • Voltage - Rated DC

    Voltage - Rated DC is a parameter that specifies the maximum direct current (DC) voltage that an electronic component can safely handle without being damaged. This rating is crucial for ensuring the proper functioning and longevity of the component in a circuit. Exceeding the rated DC voltage can lead to overheating, breakdown, or even permanent damage to the component. It is important to carefully consider this parameter when designing or selecting components for a circuit to prevent any potential issues related to voltage overload.

    45V
  • Max Power Dissipation

    The maximum power that the MOSFET can dissipate continuously under the specified thermal conditions.

    500mW
  • Current Rating

    Current rating is the maximum current that a fuse will carry for an indefinite period without too much deterioration of the fuse element.

    100mA
  • Frequency

    In electronic components, the parameter "Frequency" refers to the rate at which a signal oscillates or cycles within a given period of time. It is typically measured in Hertz (Hz) and represents how many times a signal completes a full cycle in one second. Frequency is a crucial aspect in electronic components as it determines the behavior and performance of various devices such as oscillators, filters, and communication systems. Understanding the frequency characteristics of components is essential for designing and analyzing electronic circuits to ensure proper functionality and compatibility with other components in a system.

    300MHz
  • Base Part Number

    The "Base Part Number" (BPN) in electronic components serves a similar purpose to the "Base Product Number." It refers to the primary identifier for a component that captures the essential characteristics shared by a group of similar components. The BPN provides a fundamental way to reference a family or series of components without specifying all the variations and specific details.

    BC547
  • Polarity

    In electronic components, polarity refers to the orientation or direction in which the component must be connected in a circuit to function properly. Components such as diodes, capacitors, and LEDs have polarity markings to indicate which terminal should be connected to the positive or negative side of the circuit. Connecting a component with incorrect polarity can lead to malfunction or damage. It is important to pay attention to polarity markings and follow the manufacturer's instructions to ensure proper operation of electronic components.

    NPN
  • Voltage

    Voltage is a measure of the electric potential difference between two points in an electrical circuit. It is typically represented by the symbol "V" and is measured in volts. Voltage is a crucial parameter in electronic components as it determines the flow of electric current through a circuit. It is responsible for driving the movement of electrons from one point to another, providing the energy needed for electronic devices to function properly. In summary, voltage is a fundamental concept in electronics that plays a key role in the operation and performance of electronic components.

    40V
  • Element Configuration

    The distribution of electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals.

    Single
  • Current

    In electronic components, "Current" refers to the flow of electric charge through a conductor or semiconductor material. It is measured in amperes (A) and represents the rate at which electric charge is moving past a specific point in a circuit. Current is a crucial parameter in electronics as it determines the amount of power being consumed or delivered by a component. Understanding and controlling current is essential for designing and operating electronic circuits efficiently and safely. In summary, current is a fundamental electrical quantity that plays a key role in the functionality and performance of electronic components.

    1A
  • Power Dissipation

    the process by which an electronic or electrical device produces heat (energy loss or waste) as an undesirable derivative of its primary action.

    500mW
  • Power - Max

    Power - Max is a parameter that specifies the maximum amount of power that an electronic component can handle without being damaged. It is typically measured in watts and indicates the upper limit of power that can be safely supplied to the component. Exceeding the maximum power rating can lead to overheating, malfunction, or permanent damage to the component. It is important to consider the power-max rating when designing circuits or systems to ensure proper operation and longevity of the electronic components.

    500mW
  • Gain Bandwidth Product

    The gain–bandwidth product (designated as GBWP, GBW, GBP, or GB) for an amplifier is the product of the amplifier's bandwidth and the gain at which the bandwidth is measured.

    100MHz
  • Transistor Type

    Transistor type refers to the classification of transistors based on their operation and construction. The two primary types are bipolar junction transistors (BJTs) and field-effect transistors (FETs). BJTs use current to control the flow of current, while FETs utilize voltage to control current flow. Each type has its own subtypes, such as NPN and PNP for BJTs, and MOSFETs and JFETs for FETs, impacting their applications and characteristics in electronic circuits.

    NPN
  • Collector Emitter Voltage (VCEO)

    Collector-Emitter Voltage (VCEO) is a key parameter in electronic components, particularly in transistors. It refers to the maximum voltage that can be applied between the collector and emitter terminals of a transistor while the base terminal is open or not conducting. Exceeding this voltage limit can lead to breakdown and potential damage to the transistor. VCEO is crucial for ensuring the safe and reliable operation of the transistor within its specified limits. Designers must carefully consider VCEO when selecting transistors for a circuit to prevent overvoltage conditions that could compromise the performance and longevity of the component.

    45V
  • Max Collector Current

    Max Collector Current is a parameter used to specify the maximum amount of current that can safely flow through the collector terminal of a transistor or other electronic component without causing damage. It is typically expressed in units of amperes (A) and is an important consideration when designing circuits to ensure that the component operates within its safe operating limits. Exceeding the specified max collector current can lead to overheating, degradation of performance, or even permanent damage to the component. Designers must carefully consider this parameter when selecting components and designing circuits to ensure reliable and safe operation.

    100mA
  • DC Current Gain (hFE) (Min) @ Ic, Vce

    The parameter "DC Current Gain (hFE) (Min) @ Ic, Vce" in electronic components refers to the minimum value of the DC current gain, denoted as hFE, under specific operating conditions of collector current (Ic) and collector-emitter voltage (Vce). The DC current gain hFE represents the ratio of the collector current to the base current in a bipolar junction transistor (BJT), indicating the amplification capability of the transistor. The minimum hFE value at a given Ic and Vce helps determine the transistor's performance and efficiency in amplifying signals within a circuit. Designers use this parameter to ensure proper transistor selection and performance in various electronic applications.

    200 @ 2mA 5V
  • Current - Collector Cutoff (Max)

    The parameter "Current - Collector Cutoff (Max)" refers to the maximum current at which a transistor or other electronic component will cease to conduct current between the collector and emitter terminals. This parameter is important in determining the maximum current that can flow through the component when it is in the cutoff state. Exceeding this maximum cutoff current can lead to malfunction or damage of the component. It is typically specified in the component's datasheet and is crucial for proper circuit design and operation.

    15nA ICBO
  • Vce Saturation (Max) @ Ib, Ic

    The parameter "Vce Saturation (Max) @ Ib, Ic" in electronic components refers to the maximum voltage drop across the collector-emitter junction when the transistor is in saturation mode. This parameter is specified at a certain base current (Ib) and collector current (Ic) levels. It indicates the minimum voltage required to keep the transistor fully conducting in saturation mode, ensuring that the transistor operates efficiently and does not enter the cutoff region. Designers use this parameter to ensure proper transistor operation and to prevent overheating or damage to the component.

    600mV @ 5mA, 100mA
  • Voltage - Collector Emitter Breakdown (Max)

    Voltage - Collector Emitter Breakdown (Max) is a parameter that specifies the maximum voltage that can be applied between the collector and emitter terminals of a transistor or other semiconductor device before it breaks down and allows excessive current to flow. This parameter is crucial for ensuring the safe and reliable operation of the component within its specified limits. Exceeding the maximum breakdown voltage can lead to permanent damage or failure of the device. Designers and engineers must carefully consider this parameter when selecting components for their circuits to prevent potential issues and ensure proper functionality.

    45V
  • Max Frequency

    Max Frequency refers to the highest frequency at which an electronic component can operate effectively without degradation of performance. It is a critical parameter for devices such as transistors, capacitors, and oscillators, indicating their limitations in speed and response time. Exceeding the max frequency can lead to issues like signal distortion, heat generation, and potential failure of the component. Understanding this parameter is essential for designing circuits to ensure reliable and efficient operation.

    300MHz
  • Max Breakdown Voltage

    The "Max Breakdown Voltage" of an electronic component refers to the maximum voltage that the component can withstand across its terminals before it breaks down and allows current to flow uncontrollably. This parameter is crucial in determining the operating limits and safety margins of the component in a circuit. Exceeding the maximum breakdown voltage can lead to permanent damage or failure of the component. It is typically specified by the manufacturer in datasheets to guide engineers and designers in selecting the appropriate components for their applications.

    45V
  • Frequency - Transition

    The parameter "Frequency - Transition" in electronic components refers to the maximum frequency at which a signal transition can occur within the component. It is a crucial specification for digital circuits as it determines the speed at which data can be processed and transmitted. A higher frequency transition allows for faster operation and better performance of the electronic component. It is typically measured in hertz (Hz) or megahertz (MHz) and is specified by the manufacturer to ensure proper functioning of the component within a given frequency range.

    300MHz
  • Collector Base Voltage (VCBO)

    Collector Base Voltage (VCBO) is the maximum allowable voltage that can be applied between the collector and base terminals of a bipolar junction transistor when the emitter is open. It is a critical parameter that determines the voltage rating of the transistor and helps prevent breakdown in the collector-base junction. Exceeding this voltage can lead to permanent damage or failure of the component.

    50V
  • Emitter Base Voltage (VEBO)

    Emitter Base Voltage (VEBO) is a parameter used in electronic components, particularly in transistors. It refers to the maximum voltage that can be applied between the emitter and base terminals of a transistor without causing damage to the device. Exceeding this voltage limit can lead to breakdown of the transistor and potential failure. VEBO is an important specification to consider when designing circuits to ensure the proper operation and reliability of the components. It is typically provided in the datasheet of the transistor and should be carefully observed to prevent any potential damage during operation.

    6V
  • Height
    4.58mm
  • Length
    4.58mm
  • Width
    3.86mm
  • REACH SVHC

    The parameter "REACH SVHC" in electronic components refers to the compliance with the Registration, Evaluation, Authorization, and Restriction of Chemicals (REACH) regulation regarding Substances of Very High Concern (SVHC). SVHCs are substances that may have serious effects on human health or the environment, and their use is regulated under REACH to ensure their safe handling and minimize their impact.Manufacturers of electronic components need to declare if their products contain any SVHCs above a certain threshold concentration and provide information on the safe use of these substances. This information allows customers to make informed decisions about the potential risks associated with using the components and take appropriate measures to mitigate any hazards.Ensuring compliance with REACH SVHC requirements is essential for electronics manufacturers to meet regulatory standards, protect human health and the environment, and maintain transparency in their supply chain. It also demonstrates a commitment to sustainability and responsible manufacturing practices in the electronics industry.

    No SVHC
  • Radiation Hardening

    Radiation hardening is the process of making electronic components and circuits resistant to damage or malfunction caused by high levels of ionizing radiation, especially for environments in outer space (especially beyond the low Earth orbit), around nuclear reactors and particle accelerators, or during nuclear accidents or nuclear warfare.

    No
  • RoHS Status

    RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.

    ROHS3 Compliant
  • Lead Free

    Lead Free is a term used to describe electronic components that do not contain lead as part of their composition. Lead is a toxic material that can have harmful effects on human health and the environment, so the electronics industry has been moving towards lead-free components to reduce these risks. Lead-free components are typically made using alternative materials such as silver, copper, and tin. Manufacturers must comply with regulations such as the Restriction of Hazardous Substances (RoHS) directive to ensure that their products are lead-free and environmentally friendly.

    Lead Free
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BC547B Functional Alternatives

BC547B Functional Alternatives.jpg


BC547B Equivalents

BC546B, BC550B, BC847B, etc.


BC547B PNP Complementary

BC557B


Where to use BC547B

As a widely used general purpose transistor, the BC547B can be used as small signal and current amplifiers, for example, LED drive amplifiers, oscillators, audio amplifiers, and relay drive amplifiers.


BC547B Applications

  • General purpose switching and amplification

  • Current amplifier

  • Quick switching

  • Pulse-width modulation

  • Audio, Signal Processing, Power Management

  • Well suitable for TV and home appliance equipment

  • Small load switch transistors with high gain and low saturation voltage


BC547B Application Circuits

BC547B application circuit-audio-frequency amplifier.jpg

Audio-Frequency Amplifier


Radio-frequency amplifier.jpg

Radio-Frequency Amplifier


Radio-frequency oscillator.jpg

Radio-Frequency Oscillator


BC547B Package

BC547B Package.jpg


BC547B Mechanical Data.jpg


BC547B Manufacturer

ON Semiconductor (Nasdaq: ON) is driving energy efficient innovations, empowering customers to reduce global energy use. The company offers a comprehensive portfolio of energy efficient power and signal management, logic, discrete and custom solutions to help design engineers solve their unique design challenges in automotive, communications, computing, consumer, industrial, LED lighting, medical, military/aerospace and power supply applications. ON Semiconductor operates a responsive, reliable, world-class supply chain and quality program, and a network of manufacturing facilities, sales offices and design centers in key markets throughout North America, Europe, and the Asia Pacific regions.


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Datasheet PDF

Download datasheets and manufacturer documentation for ON Semiconductor BC547B.
Frequently Asked Questions

1.What is BC547B transistor?

A BC547B Transistor is an NPN (Negative-Positive-Negative) Bipolar Transistor: the most commonly used transistor configuration. The BC547B Collector is connected to the positive (+ve) supply via the load.

2.What’s the difference between BC547 and BC547B?

The most important difference is their hFE. The hFE of BC547 is 110 - 800 while the hFE of BC547B is 200 - 450.

3.How do I use BC547 as a switch?

1. Place Transistor on a breadboard.
2. Connect Emitter to the ground of the battery.
3. Add LED & 330 Ohm Resistor to Collector of BC547.
4. Connect 1k Resistor and Switch to Base of transistor.
5. Power up the circuit with 9V Battery.
BC547B

ON Semiconductor

In Stock: 9052

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