BD135 Transistor (NPN, 45V, 1.5A)

The BD135 is an NPN bipolar junction transistor fabricated using epitaxial planar technology, housed in a robust SOT-32 plastic package. This construction technique and package are chosen to provide a reliable and cost-effective solution for power management in electronic circuits, offering a practical balance between performance, size, and thermal dissipation.

This transistor is specifically engineered as a fundamental building block for analog amplification stages. It is designed to work in tandem with its complementary PNP counterparts, such as the BD136, enabling efficient push-pull output configurations that are central to many audio and driver circuit designs.

As a general-purpose power transistor, the BD135 serves as a versatile workhorse component. Its design targets a broad range of low to medium power amplification and switching tasks, where consistent DC current gain and dependable operation are primary requirements for circuit designers.

Features:

• NPN silicon bipolar junction transistor type, allowing controlled current flow from collector to emitter.
• Medium power handling capability suitable for general-purpose use.
• High collector current capacity up to 1.5 A for driving moderate loads.
• Moderate voltage tolerance with maximum collector-emitter endurance of 45 V.
• Low saturation voltage for efficient switching and reduced power loss.
• Wide DC current gain range for flexibility in amplification applications.
• Good thermal performance and reliability in typical operating conditions.
• Packaged in a TO-126 (SOT-32) form factor that supports through-hole mounting and heat dissipation.

Specifications:

Pinout Diagram:

Applications:

• Audio Amplifiers.
• Driver Stages.
• General-Purpose Switching.