BUL138: Product Overview and Specifications

Introduction

The BUL138 is a semiconductor device that belongs to the category of power transistors. This device is widely used in various electronic applications due to its unique characteristics and functional features. In this entry, we will provide an overview of the BUL138, including its basic information, specifications, pin configuration, functional features, advantages and disadvantages, working principles, application field plans, and alternative models.

Basic Information Overview

• Category: Power Transistor
• Use: Amplification and Switching in Electronic Circuits
• Characteristics: High Power Dissipation, Low Saturation Voltage
• Package: TO-220
• Essence: Power Amplification and Switching
• Packaging/Quantity: Typically Sold in Reels or Tubes

Specifications

• Maximum Collector-Emitter Voltage (Vce): 400V
• Maximum Collector Current (Ic): 8A
• Power Dissipation (Pd): 80W
• DC Current Gain (hFE): 25 - 100
• Transition Frequency (ft): 4 MHz
• Operating Temperature Range: -65°C to 150°C

Detailed Pin Configuration

The BUL138 has a standard TO-220 package with three pins: 1. Collector (C): Connects to the positive supply voltage. 2. Base (B): Input terminal for controlling the transistor's switching or amplification. 3. Emitter (E): Connected to the ground or common reference point.

Functional Features

• High Power Dissipation Capability
• Low Saturation Voltage for Efficient Switching
• Wide Operating Temperature Range
• Medium Transition Frequency for Broadband Applications

Advantages and Disadvantages

Advantages

• Suitable for High Power Applications
• Low Saturation Voltage Enhances Efficiency
• Wide Operating Temperature Range

Disadvantages

• Relatively Lower DC Current Gain (hFE)
• Limited Transition Frequency for High-Frequency Applications

Working Principles

The BUL138 operates based on the principles of bipolar junction transistors. When a small current flows into the base terminal, it controls a larger current flow between the collector and emitter terminals. This enables the device to amplify or switch electronic signals with high power dissipation capabilities.

Detailed Application Field Plans

The BUL138 finds extensive use in the following application fields: - Power Amplification in Audio Systems - Switching Power Supplies - Motor Control Circuits - High-Power LED Drivers - Industrial Automation Systems

Detailed and Complete Alternative Models

Some alternative models to the BUL138 include: - TIP31C - MJ15003 - 2N3055 - MJE13009

In conclusion, the BUL138 power transistor offers significant advantages in power amplification and switching applications, despite some limitations in high-frequency operations. Its robust characteristics and wide application field plans make it a popular choice in various electronic circuits.

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