BD135

The BD135 is a NPN silicon epitaxial planar transistor commonly used in audio amplifier and switching applications. This transistor is designed for low power amplifier and driver applications.

Pinout

(Note: The pin configuration below is a general representation. Refer to the specific datasheet for precise details.)

• Collector (C): Connected to the positive supply voltage in most applications.
• Base (B): Controls the transistor's conductivity, acting as the input terminal.
• Emitter (E): Connected to the ground or negative terminal in most applications.

Circuit Diagram

Include a circuit diagram illustrating the connections and operation of the BD135 transistor for a visual representation.

Key Features

• NPN Transistor: The BD135 is an NPN type transistor, allowing current to flow from the collector to the emitter when a small current is applied to the base.
• High Current Gain: This transistor offers high current gain, making it suitable for amplification applications.
• Low Saturation Voltage: The BD135 exhibits low saturation voltage, minimizing power loss in switching applications.
• Low Noise: With low noise characteristics, this transistor is suitable for audio amplifier circuits.
• High Transition Frequency: The BD135 features a high transition frequency, enabling high-frequency operation in amplifier circuits.

Note: For detailed technical specifications, please refer to the BD135 datasheet.

Application

• Audio Amplifiers: The BD135 is commonly used in audio amplifier circuits due to its low noise and high gain characteristics.
• Switching Circuits: This transistor can be used in various switching applications, such as relay drivers and motor control.
• Power Supplies: The BD135 is suitable for use in voltage regulator circuits and power supply control.

Functionality

The BD135 transistor acts as an amplifying or switching device in electronic circuits. It regulates current flow between its collector and emitter terminals based on the current applied to its base terminal.

Usage Guide

• Collector Connection: Connect the collector (C) terminal to the positive supply voltage.
• Base Control: Apply a small current or voltage signal to the base (B) terminal to control the transistor's conductivity.
• Emitter Connection: Connect the emitter (E) terminal to the ground or negative terminal.

Frequently Asked Questions

Q: What are the typical applications of the BD135 transistor?
A: The BD135 is commonly used in audio amplifier circuits, switching applications, and power supply control.

Q: What is the maximum collector current rating of the BD135?
A: The BD135 transistor typically has a maximum collector current rating of 1.5A.