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MPSA43 from NSC,National Semiconductor

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MPSA43

Manufacturer: NSC, Toshiba, FSC, FAIRCHILD, National, PH

NPN High Voltage Amplifier

Partnumber Manufacturer Quantity Availability
MPSA43 NSC, Toshiba, FSC, FAIRCHILD, National, PH 104190 In Stock

Description and Introduction

NPN High Voltage Amplifier **Introduction to the MPSA43 Transistor**  

The MPSA43 is a high-voltage NPN bipolar junction transistor (BJT) designed for applications requiring robust performance in demanding environments. Known for its ability to handle voltages up to 300V, this component is commonly used in switching circuits, amplifiers, and high-voltage power supplies.  

With a collector current rating of 500mA and a power dissipation of 625mW, the MPSA43 provides reliable operation in medium-power applications. Its high current gain (hFE) of 40 to 250 ensures efficient signal amplification, making it suitable for audio and RF circuits. The transistor is housed in a TO-92 package, offering a compact and cost-effective solution for through-hole PCB designs.  

One of the key advantages of the MPSA43 is its fast switching speed, which enables efficient performance in pulse-width modulation (PWM) and switching regulator circuits. Additionally, its high breakdown voltage makes it ideal for use in flyback converters and CRT display drivers.  

Engineers often pair the MPSA43 with complementary PNP transistors, such as the MPSA92, to create balanced push-pull amplifier stages. Its robustness and versatility have made it a popular choice in industrial, automotive, and consumer electronics applications.  

When designing with the MPSA43, proper heat management and biasing are essential to maximize performance and longevity. Datasheets provide detailed specifications for safe operating conditions, ensuring reliable integration into various circuit designs.  

Overall, the MPSA43 remains a dependable choice for high-voltage amplification and switching tasks, combining durability with consistent electrical characteristics.

Application Scenarios & Design Considerations

NPN High Voltage Amplifier

Alternative Part Number

  • 2N5551 --: NPN high-voltage transistor with similar 160V Vceo rating and low current, widely available and commonly used as a substitute for MPSA43.
  • KSP43 --: Direct NPN high-voltage amplifier transistor in TO-92 with comparable voltage and current specs, functionally equivalent to MPSA43.
  • BC547 --: General-purpose NPN transistor suitable for low-current amplifier and switching applications, though with lower voltage rating it works in many MPSA43 circuits.
  • PNMPSA43 --: NPN high-voltage transistor offering comparable voltage and current ratings, suitable for general-purpose switching and amplification.
  • BCX70 --: NPN transistor with similar small-signal switching characteristics and voltage rating, suitable as a functional alternative when exact matching is not critical.
  • BCX42 --: NPN high-voltage transistor offering comparable Vceo and current capability, suitable as a functional substitute in general switching and amplifier circuits.

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