2N4238-Transistor by ON Semiconductor | NPN Amplifier Transistor | TO-92 Package

2N4238-Transistor Overview

The 2N4238 is a silicon NPN bipolar junction transistor designed for general-purpose amplification and switching applications. It features a medium power rating with reliable performance in high-frequency circuits, making it ideal for analog and digital designs. With a maximum collector current of 1 ampere and a collector-emitter voltage rating of 60 volts, this transistor offers robust operation in moderate power environments. Its consistent gain and low noise characteristics help improve circuit stability and signal integrity. Available in a TO-18 metal can package, the device ensures good thermal dissipation and mechanical durability. For sourcing and technical details, visit IC Manufacturer.

2N4238-Transistor Key Features

• High Current Capacity: Supports collector current up to 1A, enabling effective power handling in switching circuits.
• Moderate Voltage Rating: Collector-emitter voltage max of 60V ensures safe operation in typical amplifier and switching roles.
• Low Noise Performance: Suitable for audio frequency and low-level signal amplification, enhancing signal clarity.
• TO-18 Metal Can Package: Provides excellent thermal conductivity and physical protection, improving reliability in industrial environments.

2N4238-Transistor Technical Specifications

2N4238-Transistor Advantages vs Typical Alternatives

This transistor offers a balanced combination of voltage rating, current capacity, and frequency response that suits a wide range of amplification and switching tasks better than many low-power alternatives. Its low noise figure and stable gain improve signal fidelity, while the TO-18 metal package provides superior thermal management and mechanical resilience compared to plastic encapsulated transistors. These attributes make it a reliable choice for engineers seeking a robust and versatile NPN transistor for industrial and communication applications.

Typical Applications

• Low to medium power audio amplifiers and preamplifiers, where low noise and stable gain are critical for sound quality.
• Switching regulators and power control circuits requiring reliable current handling up to 1 ampere.
• High-frequency oscillator and amplifier stages in communication equipment, benefiting from the 100 MHz transition frequency.
• General-purpose signal amplification and switching in industrial control systems and instrumentation.

2N4238-Transistor Brand Info

The 2N4238 transistor is a well-established semiconductor device widely recognized in the electronics industry for its dependable performance in amplification and switching roles. Manufactured under stringent quality standards, this product is commonly distributed by IC Manufacturer and trusted by engineers for both prototyping and production environments. Its long-standing presence and proven reliability make it a preferred choice for designers requiring a versatile NPN transistor with consistent electrical characteristics.

FAQ

What is the maximum collector current for this transistor?

The maximum collector current for this transistor is 1 ampere, enabling it to handle moderate power loads in amplifier and switching circuits without compromising performance.

What package type does the transistor come in, and why is it important?

This transistor is housed in a TO-18 metal can package, which is important for effective heat dissipation and mechanical durability, enhancing reliability in industrial and high-frequency applications.

Can this transistor be used in high-frequency circuits?

Yes, with a transition frequency (f_T) of approximately 100 MHz, this device is suitable for use in high-frequency oscillator and amplifier stages in communication equipment and other RF applications.

What are the voltage limits I should observe when using this transistor?

You should ensure the collector-emitter voltage does not exceed 60 volts, the collector-base voltage stays below 80 volts, and the emitter-base voltage remains under 5 volts to avoid damaging the transistor.

How does the transistor’s gain vary across devices?

The DC current gain (h_FE) of this transistor typically ranges from 40 to 160, indicating some variation between units but generally providing sufficient amplification for most general-purpose applications.