The BD138G is a PNP bipolar junction transistor (BJT) developed by ON Semiconductor, a company renowned for its innovative and reliable semiconductor solutions. This transistor is designed for use in a variety of applications, including audio amplifiers, switch-mode power supplies, and other general-purpose switching and amplification tasks.

Key Features:

• Transistor Polarity: PNP - This indicates that the BD138G is a PNP type transistor, which primarily uses holes as charge carriers, making it suitable for positive side switching applications.
• Collector-Emitter Voltage (VCEO): 60V - The maximum voltage across the collector-emitter terminals that the BD138G can handle while the base is open-circuited.
• Collector Current (IC): 1.5A - This is the maximum continuous current that can flow through the collector of the transistor.
• Power Dissipation (Pd): 12.5W - The amount of power in watts that the BD138G can dissipate through heat without deteriorating.
• DC Current Gain (hFE): 40 to 250 - This range indicates the amplification capability of the transistor, which is the ratio of the collector current to the base current.
• Operating Temperature Range: -55°C to +150°C - The BD138G can operate within this temperature range, ensuring stability and reliability across various environmental conditions.
• Package / Case: TO-225 - The BD138G is housed in a TO-225 package, which is a through-hole mounting design that is easy to install in various types of circuit boards.

Applications:

The BD138G's robust performance characteristics make it an excellent choice for a wide range of applications, including:

• Linear and audio amplification circuits
• Power regulation modules
• Driver stages in high-fidelity amplifiers and sound equipment
• Control systems
• Switching circuits

ON Semiconductor's BD138G transistor is a versatile component that offers a balance between performance and reliability. Whether you are developing consumer electronics, industrial control systems, or custom audio solutions, the BD138G provides the functionality needed to enhance your designs.