DiodesZetex Small Signal NPN Transistor, 500 mA, 45 V, 3-Pin SOT-323 BC817-40W-7

DiodesZetex BC817-40W-7 is a small signal NPN transistor designed to handle collector currents up to 500 mA and collector emitter voltages up to 45 V, packaged in a compact 3-pin SOT-323 surface mount device. This transistor is ideal for general purpose switching, amplification, and signal processing tasks in a variety of industrial, automotive, and consumer electronics applications.

Featuring a maximum current gain (hFE) of 170 and power dissipation capability of 200 mW, it offers efficient performance in low power circuits. The transistor supports operating temperatures ranging from -65°C to 150°C, making it suitable for harsh and varying thermal conditions often encountered in automotive or industrial environments.

With a maximum transition frequency of 100 MHz, the BC817-40W-7 transistor can be used in high frequency signal applications including RF circuits and fast switching power supplies. The device’s NPN polarity aligns with common transistor configurations providing versatility in electronic designs.

The surface mount SOT-323 package ensures efficient use of PCB space, enabling compact electronic product design. This transistor adheres to the AEC-Q101 automotive standard, ensuring high reliability and quality for automotive electronics systems.

Maximum DC collector current of 500 mA. Maximum collector emitter voltage of 45 V. High gain (hFE) of 170 for efficient amplification. Power dissipation rating of 200 mW. Operating temperature from -65°C to 150°C. Small 3-pin SOT-323 surface mount package.

Maximum transition frequency of 100 MHz. NPN transistor polarity. Automotive standard AEC-Q101 certified.

This transistor is widely used in industrial electronics, automotive control systems, HVAC controls, manufacturing equipment, and other electronic instrumentation where reliable low power transistor switching and amplification are required. For advanced electronics design and development, users are encouraged to download detailed datasheets, 3D models, schematic symbols, and PCB footprints.

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