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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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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