PMBT3904, NPN Switching Transistor, SOT-23

The PMBT3904 is a general-purpose, surface-mount NPN transistor housed in a SOT-23 package. It is widely used in switching and amplification circuits across telecom, computing, and industrial systems. With a collector current capacity of 100 mA and breakdown voltage of 40 V, it balances robustness and compact design for use in space-constrained circuits.

Key Features:

• NPN Switching Type: Suitable for digital logic, low-level amplification, and fast switching.
• Compact SOT-23 Package: Space-efficient and optimized for surface-mount PCBs.
• Fast Switching Speed: Rise and fall times of ~35 ns and 75 ns respectively.
• Low Collector-Emitter Saturation Voltage: Ensures efficiency in switching circuits.
• High DC Current Gain: Ranges from 100 to 300 depending on collector current.
• Complement to PMBT3906 (PNP): Ideal for push-pull output stages.

Additional Specifications:

• Type: NPN
• Max Voltage: 40V
• Max Current: 100Ma