Best Transistor Tester Reviews

Transistor testers are the electronic devices that are applied to check the electrical behavior of transistors and solid-state diodes. The test depends upon the actual fact that a bipolar transistor may be considered as the combination of two back to back diodes.

Actually, testing the transistor can be done with a multimeter. You could perform a diode test between the two terminals (base-collector and base-emitter) to ascertain the transistor’s basic integrity. However, using a multimeter to test a transistor can be a little hassle.

By using a transistor tester, you could save time and less effort. Simply by putting the transistor legs to the hole, and let yourself read the screen display. It can be a notification or value. Since this device is not expensive, having one unit can be a nice investment in your electronic lab.

In this post, you are presented with 5 transistor testers that we gather from the market. A transistor tester doesn’t come alone, it comes with other functionalities such as resistor tester, etc.

ProductPicture  Price
1. Longruner LCR-TC1
[Best Overall]
2. Bside ESR02 Pro
3. Atlas DCA55
5. LCR-T4 Mega328

Top 5 Best Transistor Testers

1. Longruner LCR-TC1 Transistor Tester [Best Overall]

Longruner transistor testerThis tester detects the NPN and PNP transistor, N-channel and P-channel MOSFET, capacitor, resistor, diode, triode, IGBT, JFET, triac and battery, resistor and capacitor and other components, etc.

Put the pins of the component in corresponding slots, then dial the small handle and the detector will start functioning and will test it automatically, finally, the results will display on the TFT screen clearly. ( Use 12864 LCD display with green backlight).

After detection, you need to align the infrared remote having control system with the “IR” light, then press the button which is provided on the remote, if the detector successfully decodes it, it will display the information/data code and infrared waveform.

Measurement results displayed by TFT graphic display(160 x 128), it Supports Chinese and English languages.

One key operation, Auto Power Off which saves the energy in condition or situation if the tester is not being used for a particular time (Timeout Settable). Press the multi-functional button to OFF the detector.


  • Brand Name : Longruner
  • Display Type : LCD
  • Material : Composite
  • Part Number : LW21
  • Size : Multi tester

Buy Now


  • Gives accurate results
  • Robust
  • Small in size


  • Battery timing is less (around 4 hrs in case of continuous operation)

2. Bside ESR02 PRO Digital Transistor Tester

Bside ESR02 transistor testerSmart transistor checker have the capability to detect various types of components such as NPN and PNP transistors, N-channel and P-channel MOSFET, diodes, thyristors, resistors, capacitors or other devices automatically.

It can test both plug-in and SMD devices in a very simple way and can also be used for other functions such as to test different kinds of triodes, thyristors, MOSFET, enable to analysis the device type, the output HFE, the valve voltage, the polarity of the pin, the junction capacitance of the FET. It can be operated with left or right hand as the POWER/TEST button is on both sides.

There is a table at the back of this tester “typical ESR value of electrolytic capacitor” which provides a clear indication / information that you can quickly understand and use it.

The transistor tester will automatically power off to save energy if there is not used for any operation about 10 seconds which may be known as idle time. Large LCD display with backlight function has been provided for easy reading.

It can measure bipolar transistor current amplification factor and base-emitter threshold voltage, and a single diode reverse capacitance. If the bipolar junction transistor is connected to the collector and emitter of the base and pin, the collector or emitter junction reverse capacitance can be measured.


  • Brand Name: Bside
  • Display Type: LCD
  • Material: Composite

Buy Now


  • Gives accurate results
  • Small in size and robust
  • Immediately see the pinout and the gain
  • Comes with tweezer


  • Return period is less

3. Atlas DCA55 Semiconductor Tester

Atlas DCA55The Atlas DCA55 offers many functions and comes in a unique style. It offers enhanced message display i.e. detailed information in scrollable pages and intelligent component identification.

When it comes to testing the components you just need to connect the component any way round and let this tester do the rest. This tester has the ability of automatic component identification, automatic pinout identification, where as you may connect the test leads anyway round.

Gain measurement for transistors devices along with Gate threshold measurement for enhancement-mode MOSFETs and Forward voltage drop measurements of diodes, LEDs, and transistor base-emitter junctions can be easily gotten with this tester.

It will even identify special component features/properties such as diode protection on transistors or resistor shunts values on Darlington’s.

It can find the difference between normal diodes and LEDs and it will correctly identify and characterize both LED chips in two-terminal and three-terminal bicolor LEDs.

The Atlas DCA55 transistor tester combines an impressive analysis portfolio with unequaled ease of use.


  • Brand Name: Peak Electronic Design Ltd
  • Display Type: LED
  • Item Weight: 2.00 ounces
  • Item model number: dca55

Buy Now


  • Simple to use
  • value for money


  • Difficult to measure larger transistors

4. Icquanzx LCR-T7 Transistor Tester

Icquanzx LCR-T7This tester comes with the function of self-calibration. It is used to detect various components such as NPN and PNP transistor, capacitor, resistor, diode, triode,  MOSFET (N-channel and P-channel), IGBT, JFET, triac, battery, etc. Apart from that is can also be used to detect Zener Diode and infrared waveforms.

The data code and infrared waveform will be displayed once the detector is successfully decoded (Hint: After detection, align the infrared remote control and “IR” light, then press the button in the remote control).

This tester offers single key operation, auto detection, shutdown, and you can press the Multi-function button to OFF the detector. This tester is an example of fine workmanship and good performance.


  • Brand Name: ICQUANZX
  • Display Type: 3.5 inches TFT Screen
  • Item Weight: 4.2 Ounces
  • Item model number: LCR-T7
  • Size: Approx. 88 x 80 x 28 mm

Buy Now


  • Durable and easy to use


  • Instructional manual not included in the package

5. LCR-T4 Mega328 Component Tester

LCR-T4 Mega328LCR-T4 Mega328 is a nice component tester you have to take a look. It is able to test various components and therefore, this one should be your consideration when it comes to multiple testing purposes.

It is not able to test transistors but also various other components such as inductors, capacitors, diodes, dual diodes, SCR, regulator, LED tube, ESR, resistance, and potentiometer. Even, it can detect the coefficient of MOSFET protection diode amplification. By using this device, the forward-biased voltage of the emitter transistor can be determined.

Another capability you would like to know is that it measures the gate threshold voltage and gate capacitance MOSFET.

In terms of the screen, it comes with a backlight display that uses a 12864 liquid crystal display (128 x 64 characters). The backlight is useful to use in a dimmer room. And the display is nice because it gives you fast testing speed and reliability in just 2 seconds. However, it could be more than 1 minute when facing a larger capacitor.


  • Brand Name: AiTrip
  • Display Type: LCD
  • Material: PCB
  • Part Number: 15370
  • Normal Testing Speed: 2 seconds

Buy Now


  • Durable
  • Accurate


  • No instructions for assembly

Transistor Tester Buying Guide

Transistor testers are one of the widely used electronic components testing instruments and they are available in market to buy from many sources, and obviously, there is a huge variety offered to choose from. It is the detailed product analysis, features, functions and research of the product which makes a good purchase and helps you to pick the best transistor tester. The choice of transistor tester may be a little bit difficult because some of these test instruments cost as little as $10, whilst others may be much expensive even ten times this. It is necessary to have a good look and due considerations at what is needed and what the real requirements for the transistor testers are before buying one. By doing so, it is possible to buy the best transistor testers for whatever the situation is.

There is a basic criterion that must be in mind of the users when making a transistor tester purchasing decision. It includes cost, quality and application. In addition, many other factors are also important that should be considered as well such as flexibility, ease of use, and adaptability.

It is necessary to work out what is required and then choose the best suitable transistor tester before purchasing the item.

Some more of the key points are as follows:

General usage:   Check if the transistor tester is to be used for home as hobby use or for more exacting professional use for some special project. If it is to be used for home/hobby, it is unlikely to need a high level of robustness, accuracy, resolution, battery timing, and reliability as one used for industrial or professional use. There is a considerable difference between the cost of the basic level testers and those used for professional use.

Quality: A good quality transistor tester itself is important but users need to make sure they get the best transistor tester at the best price. These transistor testers provide reliable values of the components no matter how many times you take them. It makes it easier for you to detect the faulty component etc.

Ease of Use: Users should always consider that transistor tester must be easy to use before they buy, for that they must read about particular tester’s use and basics about its functioning.


It is very important to have a good understanding of the testing of components and test equipment within any area of electronics. Testing is vital and required during all stages of research and development, manufacture, assembling, field service and repair. One can guarantee the proper working item whether it is working correctly, and if not what it is not. Nowadays, in order to test the electronic circuits a variety of testing instruments are available such as from basic meters, through analog and digital multimeters, to oscilloscopes, spectrum analysers and very many more testers.

Testing of the components is the very basic need if you are working in electronics lab or working on projects which are related to electronics or even following as hobby. Many of the electronics components can be tested with the help of the multimeter (analogue or digital) but nowadays we have dedicated testers for these tasks i.e. transistor testers. This articles is written to provide you concept of basic transistor tester along with features.

A transistor tester is also used for many other component testing,  provide you the pin configuration of various components along with many other parameters which helps you in project troubleshooting, repairing of in even designing.

Leave a Comment