The FMMT3904 is a high-performance NPN small signal transistor manufactured by Zetex Semiconductors (now Diodes Incorporated). This transistor is designed for general purpose amplification and switching applications. It's housed in a compact SOT-23 package, which makes it suitable for space-constrained applications.

Applications:

• General purpose amplification
• Switching circuits
• Driver stages
• Oscillators
• Mixer circuits

Features:

• High collector-emitter voltage (Vceo = 40V)
• High collector current (Ic = 200mA)
• Low saturation voltage
• Fast switching speed
• SOT-23 package for surface mount assembly

Benefits:

• Versatile Application: Suitable for a wide range of low to medium current amplification and switching needs.
• Space-Saving: The SOT-23 package enables high-density PCB designs.
• Efficient Switching: The fast switching speeds of this transistor contribute to efficient circuit performance.
• Reliable Performance: Zetex semiconductors are known for their reliability and consistency.
• Cost-Effective: Provides a good balance of performance and price for general-purpose applications.

Additional Details:

The FMMT3904 features a gain-bandwidth product (fT) of 300 MHz, making it suitable for high-frequency applications. Its power dissipation is rated at 330mW. The SOT-23 package offers good thermal performance for its size, and the component is typically lead-free and RoHS compliant. It's frequently used in portable devices, consumer electronics, and signal conditioning circuits.