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PN4118A from SI

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PN4118A

Manufacturer: SI

Ultra Low Leakage

Partnumber Manufacturer Quantity Availability
PN4118A SI 10100 In Stock

Description and Introduction

Ultra Low Leakage The **PN4118A** is a widely used P-channel JFET (Junction Field-Effect Transistor) designed for low-power switching and amplification applications. Known for its high input impedance and low leakage current, this component is particularly suitable for signal processing, analog switches, and voltage-controlled resistors.  

With a maximum drain-source voltage of **-25V** and a gate-source cutoff voltage typically around **-0.5V to -2.5V**, the PN4118A operates efficiently in circuits requiring precise control and minimal power consumption. Its compact TO-92 package makes it easy to integrate into various designs, from audio amplifiers to sensor interfaces.  

One of the key advantages of the PN4118A is its low noise performance, making it ideal for sensitive analog applications. Engineers often favor this JFET for its reliability, consistent performance, and compatibility with low-voltage circuits.  

When designing with the PN4118A, proper biasing and consideration of its negative threshold voltage are essential to ensure optimal functionality. Whether used in signal conditioning or as a variable resistor, this component remains a practical choice for low-power electronic systems.  

For detailed specifications, always refer to the manufacturer’s datasheet to confirm electrical characteristics and operating conditions.

Application Scenarios & Design Considerations

Ultra Low Leakage

Alternative Part Number

  • 2N4118A --: Same JFET series with identical 4118A suffix and matching electrical characteristics; widely available from a major manufacturer.
  • J201 --: Similar N-channel JFET often used as a functional substitute in low-noise amplifier circuits; check pinout and gate current specs.
  • BF256B --: N-channel JFET with comparable small-signal parameters, suitable as an alternative when exact 4118A specs are not critical.
  • 2N4118A --: JEDEC 2N-series equivalent of the PN4118A N-channel JFET, same TO-92 package and electrical characteristics.
  • J201 --: Common N-channel JFET in TO-92 with similar low-noise, low-current characteristics, widely used as a substitute in amplifier and switching circuits.
  • BF256B --: N-channel JFET in TO-92 with comparable pinch-off and transconductance specs, suitable for general-purpose small-signal applications.

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