on October 24th 1,896

Everything You Need to Know About the 2N2219 Transistor

The 2N2219 transistor is an easy-to-use and reliable component widely used in electronic circuits. This article covers everything you need to know about this transistor, from its basic function to its best uses. Whether you're looking to use it for signal amplification or switching tasks, the 2N2219 offers a straightforward solution. We’ll also dive into its features, applications, and how to work with it effectively. Keep reading to understand how the 2N2219 can be a good fit for your projects and what makes it stand out from similar transistors.

Catalog

Overview of the 2N2219 Transistor

The 2N2219 transistor is a versatile NPN transistor widely used in electronic circuits. When there is no signal at the base, the transistor remains in an off state, with the collector and emitter disconnected. Once a signal is applied to the base, the transistor switches on, allowing current to flow between the collector and emitter. This switching ability is the foundation of how the transistor works, whether used for amplifying signals or switching circuits on and off. With a gain value (hfe) of 50, the 2N2219 is capable of handling various applications that require both signal amplification and switching control. Its performance is defined by its ability to efficiently control the flow of current, making it a practical choice in many circuit designs.

2N2219 Transistor Pinout

2N2219 CAD Model Overview

2N2219 Symbol

2N2219 Footprint

Technical Specifications of 2N2219

Central Semiconductor 2N2219 technical specifications, attributes, parameters, and parts with similar specifications to Central Semiconductor 2N2219.

Type	Parameter
Factory Lead Time	8 Weeks
Mount	Through Hole
Package / Case	TO-39
Collector-Emitter Breakdown Voltage	30V
Number of Elements	1
Power Dissipation (Max)	800mW
hFE Min	35
Published	2012
JESD-609 Code	e0
Pbfree Code	No
Part Status	Active
Number of Terminations	3
ECCN Code	EAR99
Terminal Finish	Tin/Lead (Sn/Pb)
Max Operating Temperature	150°C
Min Operating Temperature	-65°C
HTS Code	8541.21.00.75
Terminal Position	Bottom
Terminal Form	Wire
Peak Reflow Temperature (°C)	Not Specified
Time @ Peak Reflow Temp (s)	Not Specified
Pin Count	3
JESD-30 Code	O-MBCY-W3
Qualification Status	Not Qualified
Polarity	NPN
Element Configuration	Single
Transistor Application	Switching
Gain Bandwidth Product	250MHz
Collector Emitter Voltage (VCEO)	1.6V
Max Collector Current	800mA
Transition Frequency	250MHz
Frequency - Transition	250MHz
Collector Base Voltage (VCBO)	60V
Emitter Base Voltage (VEBO)	5V
DC Current Gain-Min (hFE)	30
Turn Off Time-Max (toff)	285ns
RoHS Status	RoHS Compliant

Key Features of 2N2219 Transistor

Small Signal NPN Transistor

The 2N2219 is a small signal NPN transistor, which means it’s designed to handle low-power signals. It switches or amplifies these small signals in various circuits, making it versatile for different tasks in electronics.

Current Gain (hFE) Around 50

The transistor has a typical current gain (hFE) of 50. This gain indicates how much the transistor can amplify the base signal, which is useful when you need to control or boost the current flow in your circuit.

Continuous Collector Current of 800mA

This transistor can handle up to 800mA of continuous collector current. It allows you to manage higher current loads, which makes it a good choice for circuits that require a steady flow of current.

Collector-Emitter Voltage of 50V

The 2N2219 can operate with a collector-emitter voltage of up to 50V. This higher voltage handling capability provides more flexibility for use in circuits with slightly higher voltage requirements.

Collector-Base Voltage of 75V

With a collector-base voltage rating of 75V, the 2N2219 offers a higher margin for circuits that operate with elevated voltages. This feature ensures reliable performance even in circuits with varying voltage levels.

Emitter Base Voltage of 6V

The emitter-base voltage is rated at 6V, indicating the maximum allowable voltage between the emitter and base terminals. This helps protect the transistor from damage in your circuits.

Fast Switching Time

The turn-on time of 40ns and turn-off time of 250ns mean the transistor can switch quickly. This fast response is useful for applications that need rapid on-off cycling, such as in switching circuits.

TO-39 Package

The 2N2219 comes in a TO-39 metal can package, which provides durability and better heat dissipation. This feature helps maintain the transistor’s performance, especially in high-stress environments.

Common Applications of 2N2219 Transistor

Relay Driver

The 2N2219 is often used in circuits that drive relays. It switches the current to control the relay, enabling it to turn larger loads on and off, making it ideal for automation tasks and controlling devices remotely.

LED Driver

This transistor is effective in driving LEDs. It controls the current flowing through the LED, ensuring that it operates safely and efficiently in lighting or display systems, where precise current management is needed.

Audio Amplifiers

In audio amplifier circuits, the 2N2219 can amplify low-level audio signals. It helps boost the signal to drive speakers or headphones, providing clear sound output in various audio systems.

Signal Amplifiers

The 2N2219 works well in signal amplification tasks, such as in communication systems. It amplifies weak signals, improving the strength and clarity of the transmitted or received signals in the circuit.

Darlington Pair

You can pair the 2N2219 with another transistor to form a Darlington pair. This setup allows for greater current amplification, making it useful when a higher gain is required in your circuit applications.

2N2219 Equivalent Transistors

• 2N2905

Best Uses for the 2N2219 Transistor

The 2N2219 transistor can be found in numerous applications, similar to its more common counterpart, the 2N2222. It’s especially useful in situations where slightly higher voltages are involved, thanks to its metal can package that can handle increased stress. Whether you’re building switching circuits or amplifiers, the 2N2219 does a reliable job. In switching circuits, it’s often used to control loads like motors or relays, while in amplification, it helps boost weaker signals. The simplicity of its design and its ability to manage higher voltages makes the 2N2219 a go-to choice for a range of tasks, whether you’re switching loads or amplifying small signals.

Step-by-Step Guide on How to Use the 2N2219 Transistor

The 2N2219 transistor is commonly used as a switch in various circuits. When setting up the transistor, you’ll connect the load to the collector, while the emitter is grounded. This NPN transistor works by controlling the current flow through the base pin. When a small current is applied to the base, it activates the transistor, allowing a larger current to flow from the collector to the emitter, switching on the connected load.

The key part of using the 2N2219 effectively is choosing the correct base resistor, which limits the current going into the base. The value of this resistor is calculated based on the required base current (IB), which is tied to the load’s current demand (IC). The formula to calculate IB is:

IB = IC / hFE

In this case, hFE (the current gain) is around 50. Let's assume your load draws up to 800mA, so the collector current (IC) is 800mA. Based on this, the base current (IB) needed would be 16mA.

Next, you'll need to calculate the base resistor (RB) using this formula:

RB = (VCC - VBE) / IB

Here, VCC is the supply voltage, and VBE is the base-emitter voltage, typically 1.3V for the 2N2219. Using these values, you can determine the right resistor to ensure that the base receives just enough current to turn on the transistor without overloading it.

This process makes the 2N2219 a reliable switch in circuits where controlling higher currents with small base signals is needed. Although the formula provides an estimate, fine-tuning the resistor value through experimentation may sometimes be necessary to get the best performance from the transistor.

2N2219 Transistor Package Details

About the Manufacturer of 2N2219 Transistor

Central Semiconductor has been a trusted name in the semiconductor world since 1974. Known for producing high-quality discrete semiconductors, the company’s products are used in electronic devices all over the globe. Over the years, Central Semiconductor has developed a broad product range, including MOSFETs, rectifiers, silicon carbide devices, and many more. They’ve built a reputation for reliability, consistently delivering components that meet the demands of modern electronics. This long-standing experience ensures that their products, like the 2N2219, continue to be a solid choice for engineers and designers looking for dependable semiconductor solutions.

Frequently Asked Questions [FAQ]

1. Is the 2N2219 similar to the 2N2222?

Yes, the 2N2219 is quite similar to the popular NPN transistor, the 2N2222. However, the main difference lies in the packaging. The 2N2219 comes in a metal can package, which allows it to handle slightly higher voltages compared to the 2N2222.

2. What is the 2N2219 designed for?

The 2N2219 is designed for small signal applications and switching tasks. It is commonly used in circuits where switching and signal amplification are required.

3. How is the 2N2219 packaged?

The 2N2219 comes in a TO-39 metal can package, which provides better heat dissipation and durability in various circuit applications.