BC817 N-Channel Transistor 45V 0.5A SMD

The BC817 N-Channel Transistor 45V 0.5A SMD is a compact and highly reliable SMD NPN transistor designed for low-to-medium power switching, signal amplification, and high-frequency general-purpose applications. Moreover, its excellent electrical characteristics and small SOT-23 package make it ideal for modern electronic designs where efficiency and board space are major considerations. Because authentic, high-quality SMD transistors have become increasingly scarce in certain markets, the BC817 is now considered a new and rare component, especially valued by technicians, developers, and repair specialists.

Additionally, this transistor is offered in brand-new condition, ensuring stable performance, reliable gain distribution, and long operating life. Its ability to manage up to 0.5A collector current while maintaining low noise and fast switching behavior makes it suitable for power management circuits, signal-processing stages, driver circuits, and microcontroller interface designs. Furthermore, its SMD form factor allows easy placement on automated PCB assembly lines, thereby improving manufacturing efficiency and circuit compactness.

Key Features

• NPN transistor in a compact SOT-23 SMD package

• Supports up to 45V and 0.5A, ideal for signal and switching applications

• Fast switching speed and low noise performance

• Stable DC gain across a wide operating range

• Rare, high-quality component supplied in new condition

Typical Applications

• Low-power switching circuits

• Signal amplification and pre-driver stages

• Microcontroller interface and digital control circuits

• Portable electronics and consumer devices

• Repair and restoration of modern SMD-based PCBs

Furthermore, the BC817 N-Channel Transistor 45V 0.5A SMD is widely known for its reliability in high-frequency applications, making it a preferred choice for compact RF modules, communication circuits, and mixed-signal systems. Consequently, engineers often select this transistor when they need a versatile and space-efficient component capable of handling moderate power levels. Therefore, it remains a staple solution in both commercial manufacturing and professional repair environments.

Datasheet Specifications

• Transistor Type: NPN SMD Transistor

• Collector–Emitter Voltage (Vceo): 45 V

• Collector–Base Voltage (Vcbo): 50 V

• Emitter–Base Voltage (Vebo): 5 V

• Collector Current (Ic): 0.5 A

• Power Dissipation: 250–300 mW

• DC Current Gain (hFE): 100–630 (depending on grade)

• Transition Frequency (ft): 100–150 MHz

• Package: SOT-23

• Pinout:

  1. Base

  2. Emitter

  3. Collector

Why This Component Is Highly Valued

• Compact design ideal for modern, space-constrained electronics

• High-frequency performance suitable for communication circuits

• New and original, rare to find in consistent batch quality

• Excellent choice for both manufacturing and repair work