KSE340 Transistor Pinout, Applications, Equivalents, Features and Other Details

KSE340 is a high voltage transistor available TO-126 package. In this post we are going to explore KSE340 transistor pinout, applications, equivalents, features and many important information about this transistor.


KSE340 Transistor Pinout, Applications, Equivalents, Features and Other Details




Features / Technical Specifications

  • Package Type: TO-126
  • Transistor Type:  NPN
  • Max Collector Current(IC): 500mA
  • Max Collector-Emitter Voltage (VCEO): 300V
  • Max Collector-Base Voltage (VCBO): 300V
  • Max Emitter-Base Voltage (VEBO): 5V
  • Max Collector Dissipation (PC): 20W
  • Minimum & Maximum DC Current Gain (hFE): 30 – 240
  • Max Storage & Operating temperature Should Be: -55 to +150 Centigrade


Replacement and Equivalent:

2SC2899, MJE340, MJE345, MJE2361, BD410, BD158, BD128, 2SD484, 2SD1298, 2SC2809, 2SC2751, 2SC2749, 2N5657.


KSE340 Transistor Explained / Description

If you are looking for a high voltage and low current transistor then KSE340 can be a good choice. It is a general purpose high voltage NPN transistor available in TO-126 package. The transistor contains some good features which makes it suitable to use in variety of different applications. One of its main feature is upto 300V collector-emitter Voltage (VCEO) which makes it ideal to use in variety of different high voltage applications such as transformers, power supplies, UPS etc.

The absolute maximum ratings of the transistor are collector-base voltage of upto 300V, Emitter-Base voltage is 5V, collector current is 500mA and max collector dissipation is 20W. Looking at the other electrical characteristics of the transistor the VCEO(sus) is minimum 300V, collector and emitter cutoff current is 100uA.


Where We Can Use it & How to Use

KSE340 can be used in wide variety of high voltage applications other than that it can also be used in some low or normal voltage applications. Moreover, it can also be used in audio related applications.



Audio Amplifiers

Motor Driver

High Voltage Circuits

Switching Applications

Variety of General Purpose high voltage Applications


Safe Operating Guidelines

For long term good performance the designer or user must follow these guidelines. First of all it is important to not drive this device to its absolute maximum ratings and always stay 20% below form its max ratings. So according to this guideline, the maximum collector-emitter voltage is 300V therefore do not drive load of more than 240V, the maximum collector current 500mA therefore do not drive load of more than 400mA, and always store or operate the transistor at temperature above 55°C and below 150°C.



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


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