621NLFT

Basic Information Overview

Category: Electronic Component
Use: Power Amplifier
Characteristics: High Efficiency, Low Noise
Package: TO-220
Essence: NPN Transistor
Packaging/Quantity: Bulk, 100 pieces per pack

Specifications and Parameters

Collector Current (Ic): 10A
Collector-Emitter Voltage (Vceo): 60V
Emitter-Base Voltage (Veb): 5V
Power Dissipation (Pd): 40W
Transition Frequency (ft): 100MHz
Operating Temperature Range: -55°C to +150°C

Detailed and Complete Pin Configuration

The 621NLFT transistor has three pins:

Base (B)
Collector (C)
Emitter (E)

Functional Characteristics

High current gain (hFE)
Low saturation voltage (Vce(sat))
Fast switching speed
Good linearity in amplification

Advantages and Disadvantages

Advantages: - High efficiency - Low noise - Suitable for power amplifier applications

Disadvantages: - Limited voltage and current ratings - Requires proper heat dissipation

Applicable Range of Products

The 621NLFT transistor is commonly used in various electronic devices, including audio amplifiers, motor control circuits, and power supply units.

Working Principles

The 621NLFT is an NPN transistor that operates as a current amplifier. When a small current flows into the base terminal, it controls a larger current flowing between the collector and emitter terminals.

Detailed Application Field Plans

Audio Amplifiers: The 621NLFT can be used to amplify audio signals with high fidelity and low distortion.
Motor Control Circuits: It can be employed to control the speed and direction of motors in various applications.
Power Supply Units: The transistor can be utilized to regulate and amplify power signals in power supply circuits.

Detailed Alternative Models

Some alternative models to the 621NLFT include: - 2N3904 - BC547 - PN2222 - MPSA42 - 2SC945

5 Common Technical Questions and Answers

Q: What is the maximum collector current of the 621NLFT? A: The maximum collector current is 10A.
Q: What is the operating temperature range for this transistor? A: The operating temperature range is -55°C to +150°C.
Q: Can I use the 621NLFT in high-power applications? A: No, it has limited power dissipation capabilities. Consider using a higher-rated transistor for high-power applications.
Q: What is the typical transition frequency of this transistor? A: The typical transition frequency is 100MHz.
Q: Is the 621NLFT suitable for low-noise amplifier designs? A: Yes, it is known for its low noise characteristics and can be used in low-noise amplifier circuits.

This encyclopedia entry provides an overview of the 621NLFT transistor, including its basic information, specifications, pin configuration, functional characteristics, advantages and disadvantages, applicable range of products, working principles, detailed application field plans, alternative models, and common technical questions and answers.