The MMBT3904 NPN General-Purpose Transistor is a small-signal, surface-mount device optimized for low-power switching and amplification applications. Fabricated using a high-gain NPN silicon process, it delivers fast switching performance, low leakage current, and stable DC characteristics.
Packaged in a compact SOT-23 form factor, the MMBT3904 supports collector currents up to 200 mA and is suitable for high-frequency signal conditioning, logic-level interfacing, and driver circuits. Its reliable thermal behavior and consistent gain make it a preferred choice for embedded electronics, IoT modules, instrumentation, and industrial control systems.
Specifications:
- Type: NPN, general-purpose BJT
- Package: SOT-23 (SMD)
- Collector Current (IC): up to 200 mA (typ)
- Collector-Emitter Voltage (VCEO): 40 V (typ)
- DC Current Gain (hFE): 100–300 (typ range)
- Low Power Dissipation: suitable for compact designs




