2N3421 Transistor

Product Overview

The 2N3421 is a silicon NPN transistor that falls under the category of small-signal transistors. It is commonly used for amplification and switching applications due to its high frequency and low power capabilities. The transistor exhibits characteristics such as low noise, high voltage capability, and fast switching speed. It is typically packaged in a TO-39 metal can package and is available in various quantities.

Specifications

Type: NPN
Maximum Power Dissipation: 625mW
Collector-Base Voltage: 75V
Collector-Emitter Voltage: 30V
Emitter-Base Voltage: 5V
Collector Current: 500mA
DC Current Gain (hFE): 40 - 300
Transition Frequency: 150MHz

Detailed Pin Configuration

The 2N3421 transistor has three pins: 1. Base (B) 2. Collector (C) 3. Emitter (E)

Functional Features

High frequency capability
Low noise
Fast switching speed
High voltage capability

Advantages and Disadvantages

Advantages

Suitable for high frequency applications
Low noise performance
Fast switching speed

Disadvantages

Relatively low current gain compared to other transistors
Limited power dissipation capability

Working Principles

The 2N3421 operates based on the principles of amplification and control of electrical signals. When a small current flows into the base terminal, it controls a larger current flow between the collector and emitter terminals, allowing for signal amplification or switching.

Detailed Application Field Plans

The 2N3421 transistor finds extensive use in the following applications: - Audio amplifiers - Oscillators - Switching circuits - RF amplifiers - Signal processing circuits

Detailed and Complete Alternative Models

Some alternative models to the 2N3421 include: - 2N2222 - BC547 - 2N3904 - 2N4401

In conclusion, the 2N3421 transistor is a versatile component with applications in various electronic circuits, offering high frequency capability, low noise, and fast switching speed. Its limitations in terms of current gain and power dissipation are offset by its suitability for specific applications requiring these features.

[Word count: 314]