The Guide to BD243 NPN Power Transistor [FAQ]

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Published: 29 March 2022 | Last Updated: 29 March 2022

3908

BD243TU

BD243TU

ON Semiconductor

TRANS NPN 45V 6A TO-220

Purchase Guide

TRANS NPN 45V 6A TO-220

BD243 is an NPN power transistor. This article is going to explain guide details about BD243 for your reference.

This video demonstrates how to make a mini tesla coil using bd243 at home.

How to make a mini tesla coil at home || BD243 Tesla coil kit assembly || DIY Poweful Tesla coil ||

What is BD243?

The BD243 and other NPN power transistors in this series, such as the BD243ABD243B, and BD243C, are available in a TO-220 package. These transistors are intended for switching and amplification applications in general. The collector current of all of these transistors is 6A, however, the maximum collector to emitter voltage varies from 45V for the BD243 to 60V for the BD243A.  80V for the BD243B  and 100V for the BD243C.

However, if you're utilizing it in a design where you're driving a load under 45V, you can use any of the BD243/A/B/C transistors. However, if your load requires more than 45V, you can use the BD243B.  which can drive up to 80V, and if your load requires more than 80V, you can use the BD243C.

The maximum emitter to base voltage is 5 volts, the maximum power dissipation is 65 watts, and the minimum  DC  current gain is 15 to 30 percent.

 


What is Power transistor?

Transistors are semiconductor electronic devices with three terminals that can be employed as switches or amplifiers. They can be NPN or PNP polarized, and there are several distinct varieties with various power and switching speed ratings. A power transistor is one that can tolerate more than 1 A of collector current when designed according to these principles.

BD243 Pinout

bd243 pinout.jpg

BD243 Pinout

PinDescription
1Base
2Collector, connected   to mounting base
3Emitter


BD243 CAD Model

BD243 symbol.jpg

BD243 Symbol

BD243 footprint.jpg

BD243 Footprint

BD243 Features

  • Material of Transistor: Si

  • Polarity: NPN 

  • Maximum Collector  Power Dissipation (Pc): 65 W

  • Maximum Collector  -Base Voltage |Vcb|: 55 V

  • Maximum Collector-Emitter Voltage |Vce|: 45 V

  • Maximum Emitter-Base Voltage |Veb|: 5 V

  • Maximum Collector  Current |Ic max|: 6 A

  • Max. Operating  Junction Temperature  (Tj): 150 °C

  • Transition Frequency (ft): 3 MHz

  • Forward Current Transfer Ratio  (hFE), MIN: 30

  • Noise Figure, dB: -

  • Package: TO220


Specifications

ON Semiconductor BD243TU technical specifications, attributes, parameters and parts with similar specifications to ON Semiconductor BD243TU.
  • Type
    Parameter
  • 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-220-3
  • 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-220-3
  • Current-Collector (Ic) (Max)
    6A
  • 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.

    Tube
  • Part Status

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

    Obsolete
  • 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)
  • 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.

    BD243
  • 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.

    65W
  • 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
  • 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.

    15 @ 3A 4V
  • 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.

    700μA
  • 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.

    1.5V @ 1A, 6A
  • 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
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BD243 Benefits

  • High Current Gain Bandwidth Product 

  • These Devices are Pb−Free and are RoHS Compliant*

  • Low Noise, High Efficiency, Long Life

 


BD243 Applications

  • BMS Applications

  • Motor Drivers

  • Battery Chargers

  • Driving or Switching  Loads  under 6A

  • High Power Audio Amplifier Circuits 


BD243 Equivalents

BD537, 2N5497, 2N6121, 2N6123, 2N6288, 2N6289, 2N6290, 2N6291, 2N6292, 2N6293, 2SC1107, 2SC1109, 2SD476, 2SD1412, BD291, BD293, BD295, RCA1C10, RCA1C14, 2SC1108, 2SC1110

Where and How to use BD243?

The BD243 transistors are general-purpose transistors that may be used in a wide range of electronic circuits. When employed as a switch, the transistor can drive up to 6A of current, which is sufficient to operate a range of motors, electronic switches, relays, high-power transistors, and other devices. On the other hand, it can be utilized for audio amplification and is capable of producing high-power audio amplifiers.

How to know if a transistor is NPN or PNP?

Connect the positive lead of the multimeter to the transistor's Base (B) and the negative lead to the transistor's Emitter (E). If it's an NPN  transistor, the voltage drop should be between 0.45V and 0.9V on the meter. If it's a PNP  transistor, it should show "OL" on the screen (Over Limit).

 


BD243 Package Outline

BD243 package.jpg

BD243 Package Outline

BD243 Manufacturer

onsemi (formerly ON Semiconductor until August 5, 2021) is an American semiconductor supplier company, formerly in the Fortune 500, but dropping into the Fortune 1000 (ranked 512) in 2020. Products include power and signal management, logic, discrete, and custom devices for automotive, communications, computing, consumer, industrial, LED lighting, medical, military/aerospace and power applications.

Datasheet PDF

Download datasheets and manufacturer documentation for ON Semiconductor BD243TU.
Frequently Asked Questions

What is the use of BD243?

The BD243 is an NPN plastic high-power Bipolar Transistor, used for general-purpose amplifier and switching applications.

What is the operating temperature of BD243?

150°C TJ

What is the max power of BD243?

65W

What are the types of power transistor?

What are the types of power transistors?

How do you know if a transistor is NPN or PNP?

Connect the positive lead of the multimeter to the transistor's Base (B) and the negative lead to the transistor's Emitter (E). If it's an NPN transistor, the voltage drop should be between 0.45V and 0.9V on the meter. If it's a PNP transistor, it should show "OL" on the screen (Over Limit).
BD243TU

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