10 Best Transistor Tester of 2021 – Reviews By An Expert!

Electronics are taking over the world in the modern era and almost everything can be operated electronically. While using electronics, you might often want to play around and check the parameters. The transistor is one of the first things that many people check to see how it can conduct electric current or voltage.

While you are playing around with these electronics, it is best to get your hands on the best transistor tester. The best transistor checker can allow you to check the type of BJT transistor (PNP/NPN). Aside from this, it can allow you to differentiate between many of the features, including MOSFET and BJT just to get started.

Top 5 Best Transistor Tester: Editor Recommended

There are numerous transistor testers on the market today, which means finding the right one is not always easy. In the following article, we have done some deep diving to help you figure out which transistor tester is the best. Following the reviews, you will also see the buyer’s guide with all the features used to select these products.

The 10 Best Transistor Tester Reviews:

Before diving into all the crucial features, it is important that we look at the top options on the market today. If you have very little knowledge of the transistor tester, the following section will help you make the right choice. Here are the best transistor testers that we could find currently on the market for anyone to use:

1. DROK Mosfet Mega328 Transistor Tester

DROK Mosfet Transistor Capacitor Tester

To get you started, we have the DROK Transistor Tester, which comes with a wide array of different features and applications. It is a large transistor tester that features a 1.8-inch LCD display, which also displays in color. The HD resolution means that you can easily see the different parameters when the sun is shining on the screen or in the dark.

One of the top features is automatic detection. The unit tends to automatically detect NPN and PNP transistors, while also doing N or P-channel MOSFET. Aside from these four detections, it can check most other transistors and find out all the information in just a couple of seconds due to fast-working and processing speed.

While you will need to plug many transistor checkers into the plug to get them working, this is not the case with the DROK Transistor Tester. The unit features a DC9V battery that will make it completely portable. However, the battery is not included, which might mean that you need to spend a bit extra to buy one.

Fortunately, it is not one of the most expensive units on the market today and you will definitely get some great value for your money. We should mention that a countdown timer is included to shut the unit off automatically. However, the time-delay can be extended to meet any of your specific needs for power.


  • LCD color display
  • Portable
  • Affordable
  • Automatic transistor detection


  • The battery is not included

2. 1.8 inch Colorful Display Pocketable Multifunctional TFT Backlight Transistor

The Longruner Multifunctional TFT Backlight Transistor LCR-TC1 Tester is one of the more popular options on the market today. Almost any review you read on the best transistor tester will give you this option. It also features a large 1.8-inch LCD display, with a colored background and a backlight to make it easier to see.

The unit is multifunctional as one should expect and it can detect the different transistors and well as diodes and capacitors. The detection limit does not stop here and you will find that it can detect almost any component in your electronics. The liquid-crystal screen ensures that your visibility on the screen will be off the chart.

In terms of usability, the unit is very simple to navigate. One simply needs to line up the IR remote control with the IR light and this will show you all the details. However, it can take a couple of minutes to decode the components before revealing all the specs. Much like the previous tester, it features automatic detection.

While it is slightly more expensive than some of the others, you will definitely get some great value for your money. Since you have one button to use when operating the system, it is much easier to figure out all the nooks and crannies. We would highly recommend the unit to anyone who needs a less sophisticated transistor tester.


  • Ideal for beginners
  • Reasonably priced
  • Automatic detection
  • Large color screen display


  • The battery is small (450mAh)

3. DROK Mosfet Transistor Capacitor Tester

DROK Mosfet Transistor Capacitor Tester

The DROK Mosfet Transistor Capacitor Tester is next on our list and much like the first one, it is from one of the top brands on the market today. As you might have guessed, you will have access to the 1.8-inch display, with a complete color spectrum. However, this one also includes the additional backlight for the dark.

The unit is complete with automatic detection, which means you don’t need to waste time programming the unit or figuring out how the system works. A DC9V battery should make the unit portable as well. However, you should take note that the battery is not included and you will need to buy it separately for the tester.

Overall, the unit is one of the easiest options on the market today. It does not have many features that you will need to get your head around. Once you turn it on, it is almost like a computer that will do all the work for you. We would also recommend it to anyone with electrical components that need to be checked or repaired.


  • Auto-detection
  • Battery compatible
  • Large 1.8-inch display
  • Backlit display


  • Battery not included

4. LCR-T4 Mega328 Digital Transistor Tester

LCR-T4 Mega328 Digital Transistor Tester
  • Test ranges:Inductors, capacitors ,...
  • Can detect the transistor, MOSFET...
  • High test speed, valid component...

If you want something a little different from the norm, you might want to consider the LCR-T4 Mega328 Digital Transistor Tester. It has a functional design and it looks similar to some of the others. However, the main component is smaller and the screen is only black and white. This should not be an issue with the backlight design.

The unit has numerous test ranges that include transistors, capacitors, and inductors among others. However, the stand out feature is the detection component. While you might need to spend a lot of time detecting with other units, the LCR-T4 Mega328 Digital Transistor Tester will give you a result in around 2-seconds.

The unit might not have all the high-end features that we see on some of the others nowadays, but it will still give you some great value for your money. In terms of the price, it is the most affordable option so far. However, the price should not scare you away, as you can be sure that you are getting value for your money.


  • 2-second detection time
  • A wide array of detection ranges
  • Affordable
  • Backlight LCD


  • No battery
  • Lacks durability without casing

5. LCR-TC1 Colorful Display TFT Backlight Transistor Tester

LCR-TC1 Colorful Display TFT Backlight Transistor Tester
  • For detecting NPN and PNP...
  • Put the pins of component in...
  • After detection, align the infrared...

If the previous option does not tickle your fancy, you might be interested in the LCR-TC1 Colorful Display TFT Backlight Transistor Tester. The unit is slightly more advanced when compared to the previous model, but it can also test a wide variety of ranges. Additionally, the manufacturer claims that it can also give you information on the battery if the electronics are using batteries.

Since you might find yourself in the dark or with bad light, you can use the colorful LCD with liquid-crystal technology to give you a clear indication of the data. The LCD is backlit, which makes it bright enough to use at night. We should mention that automatic detection will make your work much easier if you work with electronics.

Once again, you will only need to use the IR remote and line it up with the infrared light if you want to have detection and find out the details. While we are not sure about the detection speed, it will definitely be fast. The unit features a battery, which has been included and it should be very easy for the user to carry around.


  • Battery-powered
  • Backlit LCD
  • Automatic detection
  • Decent detection speed


  • Only 90% accurate

6. KOOKYE Mega328 Transistor Tester

KOOKYE Mega328 Transistor Tester
  • Automatic test the pin of a...
  • Resistance measurement resolution...
  • Inductors, capacitors , diodes,...

The KOOKYE Mega328 Transistor Tester is one of the smaller and cheaper options on the market today. The unit is not battery powered and will need a solid power supply. However, it has a wide range of detection features, which include the standard transistor(NPN or PNP), capacitor, and many other components.

The unit has a very high testing speed and it should take you no more than 2-seconds to have the results you need on your components. While the unit itself might lack some durability, it features a clear casing that will make it possible for you to use it in all weather conditions. The single button operation is very easy to navigate and use.

As for the price, it is one of the cheaper options on the market today and this is due to the limited features. However, the price is no resemblance to the quality of the unit. You can be sure that you will get some great value for your money. We would recommend it for the quality and all the features you will get.


  • Basic design
  • Reasonable Price
  • High-speed testing
  • Single-button operation


  • Lacks durability
  • Not battery-powered

7. ACEIRMC Mega 328 Graphic Transistor Tester

ACEIRMC Mega 328 Graphic Transistor Tester
  • Automatic detection of NPN and PNP...
  • Can detect the transistor, MOSFET...
  • Can be in the correct order and the...

As you might have noticed by now, almost all of the transistor checkers on the list are versatile with a range of features. The ACEIRMC Mega 328 Graphic Transistor Tester is another one of these options, but the graphical display is what stands out. It might be black and white, but the unit will give you a larger display to see the information.

The unit has the capacity to detect any transistor that you need to have tested. The MOSFET protection diode coefficient is a handy tool to have when you need some fast and accurate results. The unit also features a capacitor tester, which will be very handy when you have large electronic components that all need to be tested.

Unfortunately, the transistor tester does not have a battery included. Yes, it does work with a battery, but you will need to separately buy the battery. We should mention that the unit takes only 2-seconds to run a test. After the 2-second period, you will have all the information and you should be ready. We would recommend it for the price.


  • Portable design
  • Includes a durable casing
  • Multiple test ranges
  • 2-second test speed


  • No batteries included

8. Neoteck Transistor Tester with Test Leads

Neoteck Transistor Tester with Test Leads
  • This multifunctional capacitance...
  • Adopts TFT color LCD screen with...
  • Automatical Identification: This...

One of the most popular options on the market is the Neoteck Transistor Tester. Aside from being a functional model, the unit is very effective when used. It features a state of the art display, which is done with color. The additional backlight will ensure that you can use the unit at night and in the dark corners of your home.

Sticking to the color screen, we should also mention that it has the ability to display all your parameters in different colors. All the interior components are cased in the main design that you will carry around. This means you don’t have to remove the casing every time you use the unit. Keep in mind that mini test leads are included.

As we have mentioned, the unit is battery powered and much like the other top options, it has limited battery life. However, the battery could last you a long time due to the auto-shutoff feature. It includes a 9-volt battery and you will need to use a micro USB connection when you want to recharge the battery for the next use.

With all these features, it is easy to expect the unit to be very expensive. However, this is not the case. When compared to similar units, we have found that the Neoteck Transistor Tester is one of the top options for the price. We would recommend it for the value of the product and the overall features that simplify our lives.


  • Colorful screen
  • Functional LCD
  • 9-volt battery
  • Affordable


  • No manual included

9. DROK Mosfet Transistor Capacitor Tester

DROK Mosfet Transistor Capacitor Tester
  • Automatic Identification: Automatic...
  • Bipolar Transistor Measurement: A...
  • Measure MOSFET: It can detect the...

Moving back to one of the high-end options, you can never go wrong with the DROK Mosfet Transistor Capacitor Tester. The unit has almost all the features that you will need. It has a wide range of tests that can be conducted. However, the real kicker is that you will get all of these results in around 2-seconds of you starting the unit.

The unit is not only for your transistors and it can detect the protection diode inside the MOSFET. Having such versatility and detection speed means that you will save yourself a ton of time when it comes to using it. The large LCD display is in color and will graphically display all the test results for easy reading.

Once again, we would think that a transistor checker with all of these features will set you back a lot of money. However, this is not the case. The DROK Mosfet Transistor Capacitor Tester is affordable and when you look after the battery, it should give you many years of usage. We would recommend it for all electronic users.


  • Easy to use
  • Multifunctional design
  • Durable exterior
  • Color screen display


  • Lacks accuracy

10. wisTek Pocketable Multifunctional Transistor Tester

My product name
  • Widely Use: Transistor Tester is...
  • Display the data code and infrared...
  • One Button Operation: automatically...

Last but certainly not least, we have one of the largest options on the list. The wistek Pocketable Multifunctional Transistor Tester is one of the most functional options currently available. It features a state of the art design and color screen display. However, the liquid crystal LCD makes the display clear to read.

Once you have your mini leads connected to the electrical components, you don’t need to waste a lot of time with the setup. It should not take the unit more than 2-seconds to give you the tests. It might not have a manual, but you only have one button that needs to be operated. The button will make it easy to use and read the results.

The wisTek Pocketable Multifunctional Transistor Tester takes the worry of battery power out of your hands and it features a state of the 4.5 lithium-ion battery. The battery is already built into the device, which means that you don’t need to waste time replacing it. A standard micro USB charger will suffice for charging.


  • Budget price
  • One-touch unit
  • High-speed detection
  • Multifunctional


  • The design is large and bulky

Recommended Product

Transistor Tester

The Longruner 1.8 inch Colorful Display Pocketable Multifunctional TFT Backlight Transistor LCR-TC1 Tester is one of the leading options on the market today and it offers you a wide variety of features. It might be a bit more expensive than many of the others, but we would recommend it as the top[ pick for professional use.

Buying Guide: What to Consider When Choose Transistor Tester

Once you have gone through all of the products, you will notice that there are many more transistor testers available. To help you find the right one for your needs, we have selected a couple of the main features to help you. You can use these features as your buying guide to ensure that you make the right decision:

a) General Usage

One of the first things to look at is the general usage of the unit. The unit generally states whether it is for professional use, or for use in the comfort of your home. The hobby transistor testers are very useful. However, they might lack some durability and in many cases some accuracy. However, it should still get the job done.

Those made for professional use tend to be much better. Yes, they are also more expensive, but the features will allow you to do a lot more with the unit. In terms of functionality, these transistor testers are high-end and they should be able to measure almost anything you want to be measured.

b) Display

While you are likely to use the transistor tester in decent lighting, you might find that the LCD is not always great. Instead of using the standard black and white display, a color screen option is much easier to use and navigate. Additionally, many of these testers will give you a graphical display of data, which is much better than numbers.

c) Functionality

Another important feature is to check the test ranges of these transistor testers, Many of them are versatile with multifunctional features that will measure additional components. If you like playing around at home with your electronics, it is helpful to have all these additions. However, the multiple test ranges are better for professional users.

d) Battery

You need to ask yourself if you need a portable unit, or if you will be near a power source whenever you use the unit. If you need a portable unit, you will need to look for one with a battery. The rechargeable lithium-ion batteries tend to outlast the batteries we buy from the store. Keep in mind that you need to have a charger on hand.

e) Cost

Lastly, we don’t have an unlimited budget when it comes to buying these units, and occasionally, you will need to look for a product within your means of purchase. Much like the first point, you will have to consider the usage of the tester. If you need one for a hobby, you don’t need to spend a lot of money on the unit.


The best transistor tester can make your life easier and more interesting. If you have an interest in electronics and you want to measure some of the components the DIY transistor checker will make it easier for you to do. We have selected some of the top products, but we would love to see any of your suggestions in the comment section.


  1. https://en.wikipedia.org/wiki/Transistor_tester

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