MMBT3906-7-F

The MMBT3906-7-F is a small-signal PNP transistor manufactured by Diodes Incorporated. It is designed for various applications, including switching and amplification in electronic circuits. Here’s a detailed description of its key features and specifications:

Package and Form Factor

• Package Type: The MMBT3906-7-F is typically housed in a SOT-23 package, which is a compact, surface-mount form factor. This makes it suitable for applications where space is a constraint.
• Dimensions: The SOT-23 package generally measures approximately 2.9 mm x 1.3 mm x 1.1 mm, allowing for efficient use of PCB space.

Electrical Characteristics

• Type: PNP Bipolar Junction Transistor (BJT)
• Maximum Collector-Emitter Voltage (Vce): The MMBT3906 can handle a maximum Vce of around 40V, making it suitable for a variety of low to moderate voltage applications.
• Maximum Collector Current (Ic): It can support a continuous collector current of up to 200 mA, which is adequate for many small-signal applications.
• DC Current Gain (hFE): The transistor exhibits a DC current gain (hFE) ranging from 100 to 300, depending on the collector current, which indicates its efficiency in amplifying signals.

Thermal Characteristics

• Junction Temperature (Tj): The maximum junction temperature is typically rated at 150°C, allowing for operation in a range of environments without significant risk of thermal failure.
• Thermal Resistance: The thermal resistance from junction to ambient is low, which helps in dissipating heat effectively during operation.

Switching Characteristics

• Transition Frequency (fT): The MMBT3906 has a transition frequency of around 250 MHz, making it suitable for high-frequency applications.
• Rise and Fall Times: The transistor is designed for fast switching, which is beneficial in digital circuits and signal processing applications.

Applications

The MMBT3906-7-F is commonly used in:

• Audio amplifiers
• Signal processing circuits
• Low-frequency oscillators
• General-purpose switching applications
• Level shifting and interfacing circuits

Additional Features

• RoHS Compliant: The MMBT3906-7-F is compliant with the Restriction of Hazardous Substances (RoHS) directive, ensuring it is free from certain hazardous materials.
• High Reliability: Diodes Incorporated is known for producing reliable components, and the MMBT3906 is no exception, making it a trusted choice for engineers and designers.

Conclusion

The MMBT3906-7-F from Diodes Incorporated is a versatile and reliable PNP transistor suitable for a wide range of electronic applications. Its compact size, robust electrical characteristics, and thermal performance make it an excellent choice for both hobbyist projects and professional designs.