How Can We Use the 2N4403 Transistor? [FAQ]
Bipolar Transistors - BJT PNP Gen Pur SS
2N4403 is a widely used PNP general purpose transistor. This article will unlock its pinout, datasheet, how to use, equivalents and more details about the 2N4403 transistor.
2N4403 Overview
2N4403 is mostly employed when a simple switching device for low power loads is required. Because the component is inexpensive and simple to use, it is ideal for use when selecting a random switching device. The 2N4403 can also be used as a rudimentary power amplifier, amplifying low-power signals.
2N4403 Pinout

2N4403 Pinout
2N4403 CAD Model
Symbol

2N4403 Symbol
Footprint

2N4403 Footprint
How to Use 2N4403 Transistor?
2N4403 can be used in any typical transistor application circuit, however, to understand how it works, examine the following simple 2N4403 switching circuit.

2N4403 Switching Circuit
The circuit above employs a 2N4403 as a simple switching device and a tiny motor as the load. The little button here serves as the transistor's trigger and can be removed to leave only simple contacts to touch. A little touch can activate the transistor's gain. The 10K resistor is used to limit the current to the base and to avoid exceeding the maximum voltage allowed at the base. The 1K resistor is used to limit the current going from the base to the ground.
2N4403 Working Principle
Under no interference, a positive voltage appears at the base of the PNP transistor, and working on a PNP transistor with a positive voltage at the gate leaves the transistor in a high resistance condition. According to the characteristics of a PNP transistor, current must flow out of the base rather than into the base for it to become ON. As a result, when a positive voltage occurs at the base, only leakage current passes through the transistor and the entire battery voltage (BAT1) appears across it. As seen in the graph below, a current of 10mA must flow out of the base for a collector current of 100mA to flow and the transistor to be entirely turned on.

2N4403 Working
When the button is pressed, the transistor's base is linked to the ground, and a loop is constructed for current to flow from the base to the ground. The transistor is turned on by this current flow, and a current flows through the collector, followed by the motor. As a result, when the button is pressed, the current passes through the motor, causing it to turn on.
When the button is pressed again, the base current flow is stopped by turning off the motor. As a result, we used 2N4403 as a basic switching device, and we may use this transistor in any other application circuit.
How to Make 2N4403 Get Long Term Performance in a Circuit?
If you want the 2N4403 transistor to last in your circuit, you must not exceed the values specified above. It is also advised to keep some parameters lower than the maximum value for safety and long-term performance. Never use this transistor to drive a load that is higher than 600mA, and always keep the load under 40V DC. When using a transistor, use a sufficient base resistor; always check the pin layout before inserting it into the circuit. Do not store or operate the transistor at temperatures below -55 degrees Celsius or above +150 degrees Celsius.
2N4403 Equivalent
SS9012, 2N3906, 2N2907, BC528, ZTX550, MPS2907, PN2905, BC878, BC880
2N4403 NPN Complementary
The NPN Complementary of 2N4403: 2N4401
2N4403 Package

2N4403 Package
2N4403 Manufacturer
Since 1974, Central Semiconductor has manufactured innovative discrete semiconductors used in electronic products worldwide. Devices currently include standard and custom small signal transistors, bipolar power transistors, MOSFETs, diodes, rectifiers, protection devices, current limiting diodes, bridge rectifiers, thyristors, and silicon carbide devices. Central’s devices are available in industry standard surface mount and through-hole packages, bare die, TLMs (Tiny Leadless Modules™), and MDMs (Multi Discrete Modules™). Central has earned a reputation as a manufacturer of the highest quality products consistently delivered on-time, and a provider of exceptional value-added services.
Specifications
- TypeParameter
- Factory Lead Time8 Weeks
- 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 - Package / Case
refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.
TO-92 - Collector-Emitter Breakdown Voltage40V
- Collector-Emitter Saturation Voltage750mV
- Number of Elements1
- Power Dissipation (Max)625mW
- hFEMin30
- 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 - Published2012
- JESD-609 Code
The "JESD-609 Code" in electronic components refers to a standardized marking code that indicates the lead-free solder composition and finish of electronic components for compliance with environmental regulations.
e3 - Pbfree Code
The "Pbfree Code" parameter in electronic components refers to the code or marking used to indicate that the component is lead-free. Lead (Pb) is a toxic substance that has been widely used in electronic components for many years, but due to environmental concerns, there has been a shift towards lead-free alternatives. The Pbfree Code helps manufacturers and users easily identify components that do not contain lead, ensuring compliance with regulations and promoting environmentally friendly practices. It is important to pay attention to the Pbfree Code when selecting electronic components to ensure they meet the necessary requirements for lead-free applications.
no - Part Status
Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.
Active - Number of Terminations3
- ECCN Code
An ECCN (Export Control Classification Number) is an alphanumeric code used by the U.S. Bureau of Industry and Security to identify and categorize electronic components and other dual-use items that may require an export license based on their technical characteristics and potential for military use.
EAR99 - Terminal Finish
Terminal Finish refers to the surface treatment applied to the terminals or leads of electronic components to enhance their performance and longevity. It can improve solderability, corrosion resistance, and overall reliability of the connection in electronic assemblies. Common finishes include nickel, gold, and tin, each possessing distinct properties suitable for various applications. The choice of terminal finish can significantly impact the durability and effectiveness of electronic devices.
Matte Tin (Sn) - 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 - HTS Code
HTS (Harmonized Tariff Schedule) codes are product classification codes between 8-1 digits. The first six digits are an HS code, and the countries of import assign the subsequent digits to provide additional classification. U.S. HTS codes are 1 digits and are administered by the U.S. International Trade Commission.
8541.21.00.75 - Terminal Position
In electronic components, the term "Terminal Position" refers to the physical location of the connection points on the component where external electrical connections can be made. These connection points, known as terminals, are typically used to attach wires, leads, or other components to the main body of the electronic component. The terminal position is important for ensuring proper connectivity and functionality of the component within a circuit. It is often specified in technical datasheets or component specifications to help designers and engineers understand how to properly integrate the component into their circuit designs.
BOTTOM - Peak Reflow Temperature (Cel)
Peak Reflow Temperature (Cel) is a parameter that specifies the maximum temperature at which an electronic component can be exposed during the reflow soldering process. Reflow soldering is a common method used to attach electronic components to a circuit board. The Peak Reflow Temperature is crucial because it ensures that the component is not damaged or degraded during the soldering process. Exceeding the specified Peak Reflow Temperature can lead to issues such as component failure, reduced performance, or even permanent damage to the component. It is important for manufacturers and assemblers to adhere to the recommended Peak Reflow Temperature to ensure the reliability and functionality of the electronic components.
NOT SPECIFIED - Time@Peak Reflow Temperature-Max (s)
Time@Peak Reflow Temperature-Max (s) refers to the maximum duration that an electronic component can be exposed to the peak reflow temperature during the soldering process, which is crucial for ensuring reliable solder joint formation without damaging the component.
NOT SPECIFIED - Pin Count
a count of all of the component leads (or pins)
3 - JESD-30 Code
JESD-30 Code refers to a standardized descriptive designation system established by JEDEC for semiconductor-device packages. This system provides a systematic method for generating designators that convey essential information about the package's physical characteristics, such as size and shape, which aids in component identification and selection. By using JESD-30 codes, manufacturers and engineers can ensure consistency and clarity in the specification of semiconductor packages across various applications and industries.
O-PBCY-T3 - Qualification Status
An indicator of formal certification of qualifications.
Not Qualified - 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.
PNP - Element Configuration
The distribution of electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals.
Single - Transistor Application
In the context of electronic components, the parameter "Transistor Application" refers to the specific purpose or function for which a transistor is designed and used. Transistors are semiconductor devices that can amplify or switch electronic signals and are commonly used in various electronic circuits. The application of a transistor can vary widely depending on its design and characteristics, such as whether it is intended for audio amplification, digital logic, power control, or radio frequency applications. Understanding the transistor application is important for selecting the right type of transistor for a particular circuit or system to ensure optimal performance and functionality.
SWITCHING - 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.
200MHz - 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.
750mV - 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.
600mA - Transition Frequency
Transition Frequency in electronic components refers to the frequency at which a device can transition from one state to another, typically defining the upper limit of its operating frequency. It is a critical parameter in determining the speed and performance of active components like transistors and integrated circuits. This frequency is influenced by factors such as capacitance, resistance, and the inherent characteristics of the materials used in the component's construction. Understanding transition frequency is essential for optimizing circuit designs and ensuring reliable signal processing in various applications.
200MHz - 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.
200MHz - 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.
40V - 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.
5V - DC Current Gain-Min (hFE)
The parameter "DC Current Gain-Min (hFE)" in electronic components refers to the minimum value of the DC current gain of a bipolar junction transistor (BJT). It is a measure of how much the transistor amplifies the input current to produce the output current. The hFE value indicates the ratio of the output current to the input current when the transistor is operating in the active region. A higher hFE value signifies a higher current gain and better amplification capabilities of the transistor. It is an important parameter to consider when designing and analyzing transistor circuits for various electronic applications.
100 - Continuous Collector Current
Continuous Collector Current is the maximum amount of current that a transistor can continuously carry through its collector terminal without overheating or being damaged. This parameter is crucial for designing circuits as it determines the suitability of a transistor for specific applications. Exceeding this value can lead to reduced performance or failure of the component. It is typically specified in amperes (A) and varies based on the transistor's construction and cooling conditions.
600mA - Turn Off Time-Max (toff)
The parameter "Turn Off Time-Max (toff)" in electronic components refers to the maximum time taken for a device to switch from an ON state to an OFF state. It is a crucial specification in devices such as transistors, diodes, and other semiconductor components that control the flow of current. The turn-off time is important for determining the switching speed and efficiency of a component, as a shorter turn-off time generally indicates faster operation and reduced power losses. Designers and engineers use this parameter to ensure proper functioning and performance of electronic circuits and systems.
255ns - Turn On Time-Max (ton)
Turn On Time-Max (ton) is a parameter in electronic components that refers to the maximum time it takes for a device to transition from an off state to an on state when a specific input signal is applied. This parameter is crucial in determining the speed and efficiency of the component in switching operations. A shorter turn-on time indicates faster response and better performance in applications where quick switching is required. It is typically specified in the component's datasheet and is important for designers to consider when selecting components for their circuits to ensure proper functionality and timing requirements are met.
35ns - RoHS Status
RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.
RoHS 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
Datasheet PDF
- Datasheets :
- ReachStatement :
Parts with Similar Specs
What is 2N2203 Transistor?
A PNP bipolar junction transistor.
What are the three terminals of 2n4403 called?
Emitter base-collector.
What type of transistor does 2n4403 work similar to?
NPN transistor.
What is the base terminal of a PNP transistor?
Negative.
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