MMBT2N3906 Transistor 2A PNP 40V 200mA 1500mW Surface Mount SOT-23

MMBT2N3906 Transistor is a general-purpose surface-mount PNP transistor (BJT) designed for switching and amplification tasks. Packaged in a compact SOT-23 case, it is widely used in low-power applications and digital circuits due to its fast switching time and high gain characteristics.

Key Features:

• PNP Type: Conducts when base is low; useful for low-side switching.
• Surface Mount: SOT-23 package ideal for compact PCBs and automated assembly.
• Low Collector-Emitter Saturation: Ensures efficient switching with minimal voltage drop.
• High DC Gain: Suitable for analog signal amplification and interface applications.
• Complement to MMBT2N3904: Useful in push-pull and H-bridge driver configurations.

Technical Specifications:

• Transistor Type: PNP
• Collector-Emitter Voltage (V_CEO): −40V
• Collector-Base Voltage (V_CBO): −60V
• Emitter-Base Voltage (V_EBO): −5V
• Collector Current (I_C): −200mA
• Power Dissipation (P_D): 1500mW
• DC Current Gain (h_FE): 100 to 300 (at I_C = 10mA)
• Transition Frequency (f_T): 250 MHz (typical)
• Package: SOT-23 (Surface Mount)

Mechanical Specifications:

• Package: SOT-23 (TO-236AB)
• Pin Count: 3
• Mounting: Surface mount (SMD)
• Marking Code: “2A”

Pin Configuration (SOT-23):

• Pin 1: Base
• Pin 2: Emitter
• Pin 3: Collector

Schematic Diagram, Connection, Wiring and Pinout:

• Usage: Commonly used in inverters, logic level shifters, and signal amplifiers.
• Configuration: Standard PNP configuration with collector to load, emitter to Vcc.
• Biasing: Requires negative base current relative to emitter to turn ON.

Datasheet and Documentation:

• Download MMBT2N3906 Transistor Datasheet (PDF)

Applications:

• Signal Amplifiers: Ideal for small-signal amplification in audio and RF circuits.
• Switching Circuits: Used to drive loads in automation and control systems.
• Push-Pull Amplifiers: Often paired with NPN transistor for dual polarity operation.
• Level Shifting: Converts signal levels between different logic families.
• General Purpose Use: Suitable for education kits, prototyping, and embedded systems.

Equivalent Models:

• 2N3906: Through-hole version with identical electrical characteristics
• BC558: Similar PNP transistor with slightly lower current ratings
• SS8550: PNP alternative with higher current capability

Package Includes:

• 1 x MMBT2N3906 Transistor (SOT-23)