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MPSA25 from S

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MPSA25

Manufacturer: S, MOT

Small Signal Transistors

Partnumber Manufacturer Quantity Availability
MPSA25 S, MOT 2991 In Stock

Description and Introduction

Small Signal Transistors # Introduction to the MPSA25 Transistor  

The **MPSA25** is a high-voltage NPN bipolar junction transistor (BJT) designed for general-purpose amplification and switching applications. Known for its robust performance, this component is commonly used in circuits requiring medium power handling and elevated voltage levels.  

## Key Features  

- **High Voltage Capability**: The MPSA25 can withstand collector-emitter voltages (VCEO) up to 250V, making it suitable for high-voltage circuits.  
- **Moderate Current Handling**: With a continuous collector current (IC) of 500mA, it is well-suited for low to medium-power applications.  
- **Good Gain Characteristics**: The transistor offers a DC current gain (hFE) ranging from 40 to 250, ensuring reliable signal amplification.  
- **Low Saturation Voltage**: This feature enhances efficiency in switching applications.  

## Typical Applications  

The MPSA25 is widely used in:  
- Audio amplifiers  
- Voltage regulators  
- Relay and motor drivers  
- High-voltage signal switching  

## Package and Pin Configuration  

The transistor is typically housed in a **TO-92** package, with standard pin assignments: **Emitter (E), Base (B), Collector (C)**. Its compact size and ease of use make it a popular choice for prototyping and commercial designs.  

## Conclusion  

With its high-voltage tolerance and dependable performance, the MPSA25 remains a versatile choice for engineers and hobbyists working on amplification and switching circuits. Proper heat management and adherence to datasheet specifications ensure optimal operation.

Application Scenarios & Design Considerations

Small Signal Transistors

Alternative Part Number

  • 2N3904 --: Widely available NPN general-purpose transistor with similar small-signal switching characteristics and low cost.
  • BC547 --: Common NPN bipolar transistor offering comparable current gain and voltage ratings for general switching and amplification.
  • 2N2222A --: Robust NPN transistor with higher current capability, suitable as a functional substitute in most low-power circuits.
  • 2N6426 --: NPN Darlington transistor with comparable current gain and voltage ratings, widely available and pin-compatible in TO-92.
  • BC517 --: High-gain NPN Darlington in TO-92 with similar collector current and voltage, suitable drop-in replacement for many MPSA25 circuits.
  • MMBTA28 --: NPN Darlington transistor with similar gain and voltage characteristics, available in SOT-23 for space-constrained designs.

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