Infineon SMBT3904: General-Purpose NPN Bipolar Junction Transistor

The Infineon SMBT3904 is a widely used NPN bipolar junction transistor (BJT) designed for general-purpose amplification and switching applications. Housed in a compact SMB (Surface-Mount Small Plastic) package, this transistor combines high performance with space efficiency, making it suitable for modern electronic designs where board real estate is critical.

With a collector-emitter voltage (VCEO) of 40 V and a continuous collector current (IC) rating of 200 mA, the SMBT3904 is robust enough for a variety of low-power circuits. Its DC current gain (hFE) ranges typically from 100 to 300 at 10 mA, ensuring reliable signal amplification. The device also features a low saturation voltage, enhancing its efficiency in switching operations.

Key applications include signal amplification in audio stages, switching loads in digital circuits, and interface control in embedded systems. The transistor’s fast switching speed makes it ideal for pulse and digital waveform generation. Additionally, its compatibility with automated pick-and-place processes streamlines high-volume manufacturing.

Infineon’s emphasis on quality ensures high reliability and thermal stability, meeting the demands of consumer electronics, industrial controls, and communication devices. The SMBT3904 serves as a versatile and cost-effective solution for engineers seeking a proven component for everyday circuit design.

ICGOO FIND: The Infineon SMBT3904 stands out as a reliable, surface-mount NPN transistor offering balanced performance for amplification and switching, backed by Infineon’s engineering excellence.

Keywords:

NPN Transistor

General-Purpose Amplification

Switching Applications

Surface-Mount Device

High Current Gain