PA76 - English Editing Encyclopedia Entry

Product Overview

Category: Electronic Component
Use: Amplifier Circuit
Characteristics: High Gain, Low Noise
Package: TO-92
Essence: NPN Transistor
Packaging/Quantity: Bulk Packaging, 1000 units per pack

Specifications

• Maximum Collector Current: 100mA
• Maximum Collector-Emitter Voltage: 40V
• Maximum Power Dissipation: 500mW
• Transition Frequency: 300MHz
• Collector-Base Voltage: 60V
• Emitter-Base Voltage: 5V
• Operating Temperature Range: -55°C to +150°C

Detailed Pin Configuration

The PA76 transistor has three pins:

1. Base (B): Used to control the flow of current through the transistor.
2. Emitter (E): Connected to the ground and allows the flow of electrons.
3. Collector (C): Collects the majority of the current flowing through the transistor.

Functional Features

• High gain: The PA76 transistor offers high voltage amplification, making it suitable for various audio and signal processing applications.
• Low noise: It exhibits low noise characteristics, ensuring minimal interference in sensitive circuits.
• Fast switching speed: The transistor enables quick switching between on and off states, facilitating efficient signal processing.

Advantages and Disadvantages

Advantages: - High gain amplification - Low noise operation - Compact TO-92 package - Wide operating temperature range

Disadvantages: - Limited maximum collector current - Moderate power dissipation capability

Working Principles

The PA76 transistor operates based on the principles of bipolar junction transistors (BJTs). In an NPN transistor configuration, a small current applied to the base terminal controls a larger current flowing from the collector to the emitter. This amplification effect allows the transistor to function as an amplifier in various electronic circuits.

Detailed Application Field Plans

The PA76 transistor finds applications in a wide range of electronic devices and circuits, including:

1. Audio Amplifiers: Used to amplify audio signals in radios, televisions, and music systems.
2. Signal Processing Circuits: Employed in filters, oscillators, and mixers for signal conditioning and modulation.
3. Sensor Interfaces: Utilized in sensor circuits to amplify weak signals from sensors such as temperature, light, and pressure sensors.
4. Switching Circuits: Integrated into digital logic gates and flip-flops for switching operations.

Detailed and Complete Alternative Models

1. BC547: Similar NPN transistor with comparable specifications and pin configuration.
2. 2N3904: Commonly used NPN transistor offering similar characteristics and package type.
3. PN2222: Another NPN transistor suitable for general-purpose amplification and switching applications.

In conclusion, the PA76 transistor is a versatile electronic component belonging to the category of NPN transistors. It offers high gain amplification, low noise operation, and fast switching speed. With its compact TO-92 package, it finds applications in audio amplifiers, signal processing circuits, sensor interfaces, and switching circuits. Alternative models such as BC547, 2N3904, and PN2222 can be considered as substitutes for the PA76 transistor.