BD135 NPN Bipolar Power Transistor 1.5A 45V SOT-32

The BD135 is a general-purpose NPN power transistor in a SOT-32 package, rated for 1.5A and 45V, commonly used in audio amplifier output stages.

5.00 EGP

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SKU:9428202312591
BD135 NPN Bipolar Power Transistor 1.5A 45V SOT-32

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:
Key Specification Details for BD135
Transistor Polarity: NPN
Absolute Maximum Ratings
Collector-Base Voltage (VCBO): 45 V
Collector-Emitter Voltage (VCEO): 45 V
Emitter-Base Voltage (VEBO): 5 V
Collector Current (IC): 1.5 A
Collector Peak Current (ICM): 3 A
Total Power Dissipation (TCase ≤ 25°C): 12.5 W
Key Electrical Characteristic
DC Current Gain (hFE): Min. 25 to 250 (typical, depends on group/conditions)
Thermal Data
Thermal Resistance, Junction-Case: 10 °C/W

Pinout Diagram:

Pin No Pin Name
1 Emitter
2 Collector
3 Base
Applications:
  • Audio Amplifiers.
  • Driver Stages.
  • General-Purpose Switching.
Package Contents:
  • 1x BD135 NPN Bipolar Power Transistor 1.5A 45V SOT-32
Datasheet

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