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PN2222 from FAIRCHILD,Fairchild Semiconductor

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PN2222

Manufacturer: FAIRCHILD, National, FSC

0.625W Switching NPN Plastic Leaded Transistor. 30V Vceo, 0.600A Ic, 35 hFE.

Partnumber Manufacturer Quantity Availability
PN2222 FAIRCHILD, National, FSC 34336 In Stock

Description and Introduction

0.625W Switching NPN Plastic Leaded Transistor. 30V Vceo, 0.600A Ic, 35 hFE. **Introduction to the PN2222 Transistor**  

The PN2222 is a widely used NPN bipolar junction transistor (BJT) known for its reliability and versatility in electronic circuits. Designed for general-purpose amplification and switching applications, it is a popular choice among hobbyists and engineers alike.  

With a maximum collector current of 600 mA and a collector-emitter voltage rating of 30 V, the PN2222 is well-suited for low-power applications such as signal amplification, motor control, and LED driving. Its compact TO-92 package makes it easy to integrate into various circuit designs.  

The transistor features a moderate current gain (hFE) ranging from 100 to 300, ensuring stable performance in amplification tasks. Additionally, its fast switching speed allows for efficient use in digital logic circuits and pulse applications.  

Due to its robust construction and consistent performance, the PN2222 is often considered a direct equivalent to the 2N2222 transistor, though slight variations in specifications may exist. Whether used in educational projects or commercial devices, the PN2222 remains a fundamental component in modern electronics.  

For optimal performance, proper biasing and heat dissipation should be considered, especially in high-frequency or continuous-operation scenarios. Its affordability and widespread availability further contribute to its enduring popularity.

Application Scenarios & Design Considerations

0.625W Switching NPN Plastic Leaded Transistor. 30V Vceo, 0.600A Ic, 35 hFE.

Alternative Part Number

  • 2N3904 --: Widely available NPN general-purpose transistor with similar small-signal switching characteristics and TO-92 package, a common drop-in substitute for the PN2222.
  • BC547 --: Standard NPN small-signal transistor with comparable current gain and voltage ratings, suitable for general switching and amplification in place of the PN2222.
  • MMBT2222A --: SMD version of the 2222A NPN transistor with equivalent electrical ratings, useful when a surface-mount alternative to the through-hole PN2222 is needed.
  • 2N3904 --: Widely available NPN general-purpose transistor with similar small-signal switching characteristics and TO-92 package, a common drop-in substitute for the PN2222.
  • BC547 --: Standard NPN small-signal transistor with comparable current gain and voltage ratings, suitable for general switching and amplification where the PN2222 is used.
  • MMBT2222A --: SMD version of the 2N2222A family with equivalent electrical ratings, useful when a surface-mount replacement for the through-hole PN2222 is acceptable.
  • 2N3904 --: Widely available NPN general-purpose transistor with similar current and voltage ratings, commonly used as a direct substitute for the PN2222 in low-power switching and amplification.
  • BC547 --: Popular NPN small-signal transistor with comparable gain and current capability, suitable for many circuits where the PN2222 is used, though pinout should be verified.
  • MMBT2222A --: SMD version of the 2N2222A family with equivalent electrical characteristics, ideal when a surface-mount alternative to the through-hole PN2222 is needed.

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