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MMST3904 from ROHM

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MMST3904

Manufacturer: ROHM, ROHM原盘

Conductor Holdings Limited - NPN Silicon Epitaxial Planar Transistor

Partnumber Manufacturer Quantity Availability
MMST3904 ROHM, ROHM原盘 5423 In Stock

Description and Introduction

Conductor Holdings Limited - NPN Silicon Epitaxial Planar Transistor **Introduction to the MMST3904 Transistor**  

The MMST3904 is a widely used NPN bipolar junction transistor (BJT) designed for general-purpose amplification and switching applications. Known for its reliability and performance, this small-signal transistor is commonly found in consumer electronics, communication devices, and industrial circuits.  

With a maximum collector current (IC) of 200 mA and a collector-emitter voltage (VCEO) of 40 V, the MMST3904 is suitable for low-power applications. Its high current gain (hFE) of 100 to 300 ensures efficient signal amplification, while its fast switching speed makes it ideal for digital logic circuits. The transistor operates within a temperature range of -55°C to +150°C, providing stability in various environments.  

Packaged in a compact SOT-23 surface-mount form factor, the MMST3904 is optimized for space-constrained PCB designs. Its small footprint and low power consumption make it a preferred choice for portable and battery-operated devices. Engineers frequently use this transistor in audio amplifiers, signal processing circuits, and as a driver for relays or LEDs.  

Due to its standardized specifications and widespread availability, the MMST3904 remains a fundamental component in modern electronics. Its balance of performance, size, and cost-effectiveness ensures its continued relevance in both prototyping and mass production.  

For detailed electrical characteristics, designers should refer to the manufacturer’s datasheet to ensure proper circuit integration.

Application Scenarios & Design Considerations

Conductor Holdings Limited - NPN Silicon Epitaxial Planar Transistor

Alternative Part Number

  • 2N3904 --: Classic NPN general-purpose transistor with similar Vceo, Ic and gain; widely available and electrically compatible in most circuits.
  • BC847 --: SOT-23 NPN transistor with comparable current and voltage ratings, suitable drop-in replacement for small-signal switching and amplification.
  • 2SC2712 --: SOT-23 NPN small-signal transistor with similar gain and current capability, commonly used as an alternative in Japanese-designed circuits.
  • S8050 --: Low-cost SOT-23 NPN transistor with similar current capability and voltage rating; suitable for general switching and amplification where exact matching is not critical.

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