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MPSA28 from FAIRCHILD,Fairchild Semiconductor

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MPSA28

Manufacturer: FAIRCHILD, ROHM, FSC, MOTO, MOTOROLA

Small Signal Darlington NPN

Partnumber Manufacturer Quantity Availability
MPSA28 FAIRCHILD, ROHM, FSC, MOTO, MOTOROLA 22170 In Stock

Description and Introduction

Small Signal Darlington NPN # Introduction to the MPSA28 Transistor  

The **MPSA28** is a high-voltage NPN bipolar junction transistor (BJT) designed for applications requiring robust performance in demanding environments. With a collector-emitter voltage (VCEO) rating of **300V**, it is well-suited for use in power supply circuits, voltage regulation, and amplification stages where elevated voltages are present.  

Featuring a moderate current handling capability, the MPSA28 can support collector currents (IC) up to **100mA**, making it useful in low-to-medium power applications. Its high DC current gain (hFE) ensures efficient signal amplification, while its low noise characteristics enhance performance in sensitive analog circuits.  

The transistor is housed in a **TO-92 package**, providing a compact and cost-effective solution for through-hole PCB designs. Its robust construction allows for reliable operation in industrial, automotive, and consumer electronics applications where stability under varying conditions is essential.  

Key applications of the MPSA28 include:  
- **High-voltage switching circuits**  
- **Audio and RF amplification**  
- **Voltage regulators and power management**  
- **Signal processing in instrumentation**  

Engineers and designers favor the MPSA28 for its dependable performance, ease of integration, and compatibility with standard circuit configurations. When selecting this transistor, proper heat dissipation and adherence to maximum ratings are recommended to ensure long-term reliability.  

Overall, the MPSA28 remains a versatile choice for electronic designs requiring a high-voltage NPN transistor with consistent performance.

Application Scenarios & Design Considerations

Small Signal Darlington NPN

Alternative Part Number

  • 2N3904 --: Widely available general-purpose NPN transistor in a TO-92 package; a common substitute for low-power switching and amplification where the higher voltage rating of the MPSA28 is not required.
  • BC547 --: Popular general-purpose NPN transistor in TO-92, easy to source and often used as a functional replacement in low-current switching circuits.
  • 2N2222A --: Robust general-purpose NPN transistor with good current capability, suitable as an alternative in many switching and amplifier applications.
  • 2N5551 --: High-voltage NPN transistor with ratings closer to the MPSA28, making it a reasonable substitute for higher-voltage switching applications.

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