New: AI Part GeneratorFree to get started
Diode & TransistorC1185383D model included

2N3904

by ST(先科)

For small-signal switching or amplification, the 2N3904 provides a familiar NPN bipolar transistor in a through-hole TO-92 package. This record represents the ST(先科) device. The supplied conversion has been used in real designs by 2 ProtoFlow engineers. Its free KiCad files pair a three-pin schematic symbol with the TO-92-3_L5.1-W4.1-P1.27-L footprint, which contains three pads for the transistor connections. A 3D model accompanies the symbol and footprint, allowing the transistor body to appear in the board's mechanical view. The complete part can also be opened directly in ProtoFlow.

Download KiCad files

Use 2N3904 in your design

ProtoFlow is a free, AI-native EDA tool. Drop this part onto a schematic, route a PCB, and let the AI copilot help. The symbol, footprint, and 3D model come in linked and ready.

Free to start. macOS, Windows and Linux. No sign-up to try.