2N3866 Transistor Pinout, Equivalent, Uses, Features and Other Details

Today we are going to discuss about 2N3866 transistor pinout, equivalent, uses, features and other details about this RF transistor. 2N3866 is not available in most stores but you can still get them in some online and local stores who have its old stock. Or other wise you can also use the equivalent and substitue for 2N3866.


2N3866 Transistor Pinout, Equivalent, Uses, Features and Other Details



Features / Technical Specifications

  • Package Type: TO-38
  • Transistor Type: NPN
  • Max Collector Current(IC): 0.4A / 400mA
  • Max Collector-Emitter Voltage (VCE): 30V
  • Max Collector-Base Voltage (VCB): 55V
  • Max Emitter-Base Voltage (VEBO): 4V
  • Max Collector Dissipation (Pc): 5 Watt
  • Max Transition Frequency (fT): 500 MHz
  • Minimum & Maximum DC Current Gain (hFE): 10 – 200
  • Max Storage & Operating temperature Should Be: -65 to +200 Centigrade


Replacement and Equivalent

2N4427, TA2658, BFW47, 2N5000, 2N5002


2N3866 Transistor Explained / Description

2N3866 is a TO-38 package transistor build for RF related applications. The max collector dissipations of 5 watt and the max transition frequency of 500MHz makes this transistor ideal to use in RF oscillators, RF drivers and RF amplifications in VHF and UHF band regions. For higher frequency requirements you can also use its other variats that is 2N3866A that can be used for maximum 800MHz.



Where We Can Use it & How to Use

As mentioned above 2N3866 is an RF transistor therefore it can be used in RF applications in VHF frequency band that is from 30MHz to 300MHz. It can also be used in the upper part of UHF band from from 300MHz to 500MHz and its variant till 800MHz. Therefore it can be used in TV and radio broadcasting applications. Additionaly it can also be used in digital communications and RF sensor circuits for example RF temperature sensors.



RF Oscillators

RF Driver Stages

RF Amplifiers


How to Get Long Term Performance in a Circuit

For getting long term performance with 2N3866 the user should not drive load of more than 400mA and 30V. Use a proper heatsink with the transistor and Always operate and store in temperature above -65 centigrade and below +150 centigrade.



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


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