2N5485 Transistor Pinout, Equivalent, Applications, Features, Explanation

This post describes 2N5485 transistor pinout, equivalent, applications, features, explanation and other useful information about how and where to use this JFET transistor.


2N5485 Transistor Pinout, Equivalent, Applications, Features, Explanation



Features / Technical Specifications:

  • Package Type: TO-92
  • Transistor Type: N Channel JFET
  • Maximum Drain to Gate Voltage: 25V
  • Maximum Reverse Gate to Source Voltage: 25V
  • Maximum Continues Gate Current: 10mA
  • Minimum to Maximum Gate to Source Cutoff Voltage : -0.5 to 4V
  • Maximum Power Dissipation: 350mW
  • Max Storage & Operating temperature Should Be: -55 to +150 °C
  • Low Noise & High Gain Capabilities


Replacement and Equivalent:

2N5486, 2N5459, 2N5638, 2N5640, 2N5654, 2N5949, BF244A, J105, J210, MPF102, PN4092.


2N5485 Transistor Explained / Description:

2N5485 is an N channel JFET, in full form it is called junction field effect transistor. The transistor is available in TO-92 and SOT-23 packages. It is mainly designed to use in VHF and UHF circuits but it is not limited to only these applications and can also be used in other type of applications such as to amplify any type of signal and also for switching purposes. Other benefits of this transistor are:

High Sensitivity:

High sensitivity means that the transistor is quite sensitive to weak signals.


High Gain:

High gain means that it will provide good gain to very weak signals.


Very High Quality Signal Amplification:

Very high quality signal amplification means that this transistor will amplify weak single with a good gain and also reduce noise because it has low noise capabilities. Low noise capability in a transistor is necessary when you want amplify weak signals because when we amplify weak signals the noise with these signals also amplifies therefore if the transistor has no low noise capabilities then it will amplify the signal but also the noise with that signal will be amplified and the signal will become distorted.


High Speed Switching:

The transistor also possesses high speed switching capabilities which can be useful in applications where high speed switching is necessary.

Moreover the transistor is also having good features such as excellent high frequency gain, low distortion; switch off isolation for both AC and DC applications.


Where We Can Use it & How to Use:

As mentioned above 2N5485 is having a lot of features due to which it can be used for wide variety of applications such as VHF and UHF signal amplifiers, mixers, oscillators, high speed switching, audio amplifications  etc.



Audio Preamplifier Applications

Audio Amplifier Stages

Low Gain Signal Amplification

VHF and UHF amplifiers, mixers etc.

Sensor & Detector Circuits


Safe Operating Guidelines / Absolute Maximum Ratings:

For getting long term performance with 2N5485 transistor the user must follow these safety guidelines. Always use the transistor 20% below from its absolute maximum ratings, the maximum gate to source voltage of the transistor is 25V so the load voltage should be under 20V, max gate current is 10mA so the load should not be more than 8mA. The transistor must not be exposed to the temperature below -55°C and above +150 °C.



To Download the datasheet just copy and paste the below link in your browser.


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