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MPSA13 from NSC,National Semiconductor

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MPSA13

Manufacturer: NSC, KEC/MOTO, FSC, ON, PH, NS, Fairchild, MOT, NationalSemiFairchild

Leaded Small Signal Transistor Darlington

Partnumber Manufacturer Quantity Availability
MPSA13 NSC, KEC/MOTO, FSC, ON, PH, NS, Fairchild, MOT, NationalSemiFairchild 42077 In Stock

Description and Introduction

Leaded Small Signal Transistor Darlington # Introduction to the MPSA13 Transistor  

The **MPSA13** is a high-gain NPN Darlington transistor designed for low-power amplification and switching applications. Known for its high current gain (hFE), this component is commonly used in signal amplification, driver circuits, and relay control where minimal input current is required to drive higher loads.  

## Key Features  
- **High Current Gain (hFE):** Typically exceeding 5,000, the MPSA13 ensures efficient signal amplification with minimal base current.  
- **Low Collector-Emitter Saturation Voltage:** Enhances switching efficiency in low-power circuits.  
- **Moderate Power Handling:** Suitable for small-signal applications with a maximum collector current (IC) of 500mA.  
- **Compact Package:** Available in TO-92 and SOT-23 packages, making it ideal for space-constrained designs.  

## Common Applications  
The MPSA13 is widely used in:  
- **Audio preamplifiers** for boosting weak signals.  
- **Relay and motor drivers** where high gain reduces control circuit complexity.  
- **Sensor interfaces** requiring signal conditioning.  
- **Automotive and industrial control systems** for low-power switching.  

## Considerations  
While the MPSA13 offers excellent gain, its switching speed is relatively slow due to the Darlington configuration. Designers should account for this in high-frequency applications. Additionally, thermal management is recommended in continuous operation to prevent performance degradation.  

In summary, the MPSA13 is a versatile, high-gain transistor well-suited for amplification and switching tasks in low-power electronic circuits. Its reliability and ease of use make it a popular choice among engineers and hobbyists alike.

Application Scenarios & Design Considerations

Leaded Small Signal Transistor Darlington

Alternative Part Number

  • 2N6426 --: NPN Darlington transistor with very high hFE, similar VCEO and current ratings, widely available and a common drop-in for MPSA13 in switching and amplifier circuits.
  • BC517 --: NPN Darlington with high current gain and comparable voltage/current ratings, suitable replacement for general-purpose Darlington applications.
  • MMBTA13 --: SMD NPN Darlington with equivalent electrical characteristics to MPSA13, good choice when a surface-mount alternative is acceptable.
  • MMBTA14 --: SMD NPN Darlington transistor with comparable voltage and gain characteristics, suitable when a surface-mount equivalent of MPSA13 is needed.
  • 2N5306 --: NPN Darlington transistor offering comparable gain and voltage ratings, usable as a functional substitute for MPSA13.

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