IC Phoenix logo

Home ›  P  › P27 > PN3643

PN3643 from FSC,Fairchild Semiconductor

Fast Delivery, Competitive Price @IC-phoenix

If you need more electronic components or better pricing, we welcome any inquiry.

PN3643

Manufacturer: FSC, Fairchild

Leaded Small Signal Transistor General Purpose

Partnumber Manufacturer Quantity Availability
PN3643 FSC, Fairchild 25200 In Stock

Description and Introduction

Leaded Small Signal Transistor General Purpose The PN3643 is a widely used electronic component known for its reliability and versatility in various circuit applications. As a general-purpose NPN bipolar junction transistor (BJT), it is commonly employed in amplification, switching, and signal processing tasks.  

Designed with a compact TO-92 package, the PN3643 offers a balance of performance and efficiency, making it suitable for low-power applications. Its key specifications include a collector current (Ic) of up to 200mA, a collector-emitter voltage (Vce) of 30V, and moderate current gain (hFE), ensuring stable operation in diverse electronic designs.  

Engineers and hobbyists often favor the PN3643 for its ease of integration into circuits such as audio amplifiers, sensor interfaces, and logic-level switching systems. Its robust construction and consistent performance under varying conditions contribute to its popularity in prototyping and commercial products alike.  

When selecting the PN3643, designers should consider its thermal characteristics and ensure proper biasing to optimize performance. While it may not be suitable for high-power applications, its cost-effectiveness and dependable operation make it a practical choice for many low-voltage projects.  

Overall, the PN3643 remains a staple in electronics due to its simplicity, durability, and broad applicability across different circuit configurations.

Application Scenarios & Design Considerations

Leaded Small Signal Transistor General Purpose

Alternative Part Number

  • 2N3904 --: Widely available general-purpose NPN transistor in TO-92, a common substitute for small-signal NPN parts like PN3643.
  • BC547 --: Standard low-noise NPN transistor with similar small-signal switching and amplification characteristics, easy to source.
  • 2N2222A --: Robust general-purpose NPN transistor with higher current capability, commonly used as a drop-in replacement in many circuits.
  • 2N3904 --: Widely available NPN general-purpose transistor with similar small-signal switching characteristics and pinout, making it a practical drop-in substitute.
  • BC547 --: Common NPN small-signal transistor with comparable current gain and voltage ratings, suitable for general switching and amplification circuits.
  • MMBT3904 --: SMD version of the 2N3904 with equivalent electrical behavior, useful when a surface-mount replacement is acceptable.

Request Quotation

For immediate assistance, call us at +86 533 2716050 or email [email protected]

Part Number Quantity Target Price($USD) Email Contact Person
We offer highly competitive channel pricing. Get in touch for details.

Specializes in hard-to-find components chips