The MMBT3904DW1T1 is a dual NPN bipolar junction transistor (BJT) manufactured by WILLAS ELECTRONIC CORP. This device is designed for general-purpose amplification and switching applications. It integrates two transistors into a single SOT-363 package, offering space savings and cost-effectiveness in circuit designs. It's commonly used in low-power applications requiring multiple transistors.

Applications:

• General-Purpose Amplification: Amplifying weak signals in various electronic circuits.
• Switching Circuits: Used as a switch to control current flow in electronic circuits.
• Driver Circuits: Driving loads such as LEDs and small relays.
• Logic Inversion: Implementing logic inversion functions in digital circuits.
• Interface Circuits: Interfacing between different circuit sections with different voltage levels.

Features:

• Dual NPN Transistors: Contains two NPN transistors in a single package.
• Low Saturation Voltage: Minimizes power loss when the transistor is in the saturation region.
• High Current Gain: Provides efficient amplification of signals.
• Fast Switching Speed: Enables rapid switching between on and off states.
• Surface Mount Package (SOT-363): Suitable for automated assembly and compact designs.
• Lead-Free Finish: Complies with environmental regulations.

Benefits:

• Space Savings: Dual transistors in a single package reduce board space requirements.
• Cost-Effective: Integrating two transistors in one package reduces overall component costs.
• Efficient Amplification: High current gain ensures efficient signal amplification.
• Reliable Switching: Fast switching speed allows for reliable performance in switching applications.
• Easy to Assemble: Surface mount package facilitates automated assembly processes.

Additional Details:

The MMBT3904DW1T1 features a collector-emitter voltage (VCEO) of 40V and a collector current (IC) of 200mA. The power dissipation is rated at 350mW. The DC current gain (hFE) typically ranges from 100 to 300, depending on the operating conditions. The operating and storage junction temperature range is -55°C to +150°C. This transistor offers a transition frequency (fT) of around 300 MHz, making it suitable for high-frequency applications. The SOT-363 package ensures efficient thermal dissipation.