A transistor tester is a versatile electronic device used to identify, test, and measure various parameters of transistors, such as type (PNP or NPN), material, and pinout. It simplifies diagnostics by also testing resistors, capacitors, and other components, making it invaluable for electronics repair and development.
- Display: For easy use, a transistor tester needs a clear, large display. Colored displays are better than monochromatic ones, and a display size of 1.8 inches is preferable over a smaller 1.2-inch one.
- Identification: The ability to identify different types of transistors accurately is vital for any tester. Our selections can distinguish among a wide array of transistor types, including NPN, PNP, MOSFET, JFET, and more, providing you with a versatile tool.
- Measurement Range: The measurement range determines what transistors the tester can analyze. Our recommended testers boast wide measurement ranges, capable of testing transistors with current gains from 0 to 20,000 mA/V, voltage thresholds up to 50V, and resistance from 0.1 ohms to 50M ohms, catering to a broad spectrum of electronic components.
Despite the significance of these aspects, there’s more to consider. Thus, our selection of top transistor testers includes detailed specs and features, complemented by a “Buying Guide” to aid your choice.
Best Transistor Testers Table
| Best Transistor Testers | Display | Identification | Warranty | Buy Now |
|---|---|---|---|---|
| DROK Transistor Tester | Colored LCD display | Automatic identification | --- | Check On Amazon |
| LONGRUNER Transistor Tester | Colored LCD display | Automatic identification | 1 year long | Check On Amazon |
| WISTEK Transistor Tester | Colored LCD display | Automatic identification | --- | Check On Amazon |
| BSIDE Transistor Tester | Monochrome LCD display | Automatic identification | 1 year long | Check On Amazon |
| YWNYT Transistor Tester | Colored LCD display | Automatic identification | --- | Check On Amazon |
| ICQUANZX Transistor Tester | Monochrome LCD display | Automatic identification | 1 year long | Check On Amazon |
| ACEIRMC Transistor Tester | Monochrome LCD display | Automatic identification | --- | Check On Amazon |
| AITRIP Transistor Tester | Colored LCD display | Automatic identification | --- | Check On Amazon |
| AIDEEPEN Transistor Tester | Colored LCD display | Automatic identification | --- | Check On Amazon |
Best Transistor Tester Reviews
1. DROK Transistor Tester
DROK is a well reputable and fairly popular brand of transistor testers and other related testing tools which are generally known to offer handy and useful features to the user.
The DROK transistor tester offers all kinds of useful features making it a great all-rounder option. For starters, you get an excellent 1.8 inch display with this unit which happens to be a colored LCD display. You also get automatic identification with this tester which allows you to work on NPN and PNP transistors along with other components.
You also get other handy features like a 40-second auto shutdown function which is quite handy for getting the most out of its 9V battery. While you do not get a warranty with this transistor tester from DROK, it does feature a great build quality which is to be expected at its high-end price.
Best Features
- Uses a colored LCD display for showing its readings
- Supports automatic identification for NPN and PNP transistors
- Offers an auto-shutdown function
Pros
- Great looking colored LCD display with a large size
- Offers pretty good battery life with an auto shutdown function
- Works with all kinds of electrical components
Cons
- A bit on the expensive side for not including a warranty
2. LONGRUNER Transistor Tester
Even though Longruner is a fairly new and small brand of electrical testing equipment, its offerings are still quite a great and versatile option thanks to the complete package that you get.
Longruner’s transistor tester is one of the best options out there if you want to get started right away since it includes all kinds of accessories in the box. Apart from its accessories, it even includes a colored LCD 1.8-inch display which looks quite great. And to get the most out of its display and included accessories, it even features automatic identification for not only NPN and PNP transistors, but other components as well.
While this transistor tester does feature an inbuilt chargeable battery for practicality, it does not come with an automatic shutdown feature which can be an issue for many. Thankfully, you will be glad to know that this transistor tester does feature a 1-year warranty for long term usage.
Best Features
- Uses a colored LCD display for showing its readings
- Supports automatic identification for NPN and PNP transistors
- Comes with a 1-year warranty
Pros
- Includes a wide range of handy accessories in the box
- Large and high-resolution display with colored readings
- Inbuilt battery for easy charging and ease of use
Cons
- Lacks an auto-shutdown function for increasing battery life
3. WISTEK Transistor Tester
wisTek is another reliable brand that manufactures transistor testers and related testing tools with useful features.
This wisTek pocketable multi-functional transistor tester is a great pick that is designed with a colored LCD 1.8-inch display to easily read the final display. It features automatic identification that detects NPN and PNP transistor, resistor, capacitor, triode capacitor, diode, P-channel & N-channel, and other components.
Also, the transistor tester features self-calibration and detects Zener diode and infrared wave forms. It comes with an automatic shutdown function with a single button operation. While you won’t get any warranty on this tester, yet it has an excellent build quality that lasts longer.
Best Features
- Supports automatic identification for PNP and NPN transistors
- Comes with an auto-shutdown function
- Uses a colored LCD display for showing its readings.
- Rechargeable battery.
Pros
- Works with all kinds of electrical components
- Offers good battery life
- Display the data code and infrared waveform
- Easy operation
Cons
- Lacks warranty information
4. BSIDE Transistor Tester
BSIDE is a premium and high-end option that you have to check while shopping for electrical components and related equipment like transistor tester
This ESR02 PRO transistor tester with tweezers is a great pick that is made for heavy-duty probes for reliable usage. Also, it features a large and easy-to-read monochrome LCD display. As you would expect, with its automatic identification support, the transistor tester will work great for both PNP and NPN transistors along with other components.
It is an easy-to-test plug-in and SMD devices that are used to test different kinds of triodes, MOSFET, the pin’s polarity, FET’s junction capacitance, or valve voltage. With its 2 power/test buttons on both sides, you can easily operate the device on either side as per your hand convenience. A table at its back with typical ESR value of electrolytic capacitor that let you understand easily and quickly.
Since it is powered by a 9V replaceable battery, BSIDE features a 10-second automatic shutdown that aids in the best possible battery life. Being a high-end and premium transistor tester, it comes with a 1-year warranty apart from the pretty sturdy build quality.
Best Features
- Supports automatic identification for PNP and NPN transistors
- Uses a monochrome LCD display to show the readings
- Offers an auto-shutdown function
- Bipolar transistor current amplification factor
- Base-emitter threshold voltage measurement
- Comes with a 1-year warranty
Pros
- Includes handy probes for working on transistors, diodes, and other components
- Offers peace of mind in its usage with the sturdy build quality and a decent warranty
- Ideal option for heavy-duty usage and wide application
- Comes with the power button on both sides of the device
Cons
- Need to purchase a 9V battery separately and on a bit expensive side as well.
5. YWNYT Transistor Tester
You can also consider YWNYT and its electrical testing tools like its transistor tester if you want something that not only offers features but also includes handy accessories.
YWNYT’s transistor tester is a highly versatile option since it includes all kinds of accessories like cables, batteries, and even components. Taking a look at the features that it includes, you will be glad to know that the YWNYT transistor tester features a colored LCD display. You also get automatic identification with it for NPN and PNP transistors.
Another automatic function of this transistor tester is its automatic shutdown function. With this, it can get the most out of its 9V battery in terms of the battery life that you can expect. However, if you want something for long term usage, you should look elsewhere since this one does not have any included warranty.
Best Features
- Uses a colored LCD display for showing its readings
- Supports automatic identification for NPN and PNP transistors
- Offers an auto-shutdown function
Pros
- Features a wide range of accessories in the box
- Handy features like auto shutdown and auto identification
- Decently large and easy to read colored display
Cons
- Misses out on an included warranty
6. ICQUANZX Transistor Tester
ICQUANZX can be another viable option for all those who want a transistor tester that is ideal for long term usage and works without any issues even over a long period of time.
This ICQUANZX LCR TC1 transistor tester is a great all-rounder option for many since not only is it quite durable and reliable, but it even includes a decent number of accessories in the box. As for its features, you will find a decent size monochrome LCD display with it. With this display, you can take advantage of its automatic shutdown function for testing NPN and PNP transistors.
Similar to most other transistor testers out there, this one also uses a 9V battery for its power requirements. And since it also has an auto-shutdown function, you can expect fairly decent battery life from it as well. But unlike others, you get a 1-year warranty with it which is quite great for most.
Best Features
- Uses a monochrome LCD display for showing its readings
- Supports automatic identification for NPN and PNP transistors
- Offers an auto-shutdown function
- Comes with a 1-year warranty
Pros
- Includes various handy and useful accessories in the box
- Decent build quality with a standard warranty for peace of mind
- Fairly long battery life thanks to auto shutdown and monochrome display
Cons
- Display’s resolution is a bit average and mediocre
7. ACEIRMC Transistor Tester
ACEIRMC is a comparatively small and much cheaper option out there when you are talking about electrical testing equipment like transistor testers and other related products.
The ACEIRMC transistor tester is the cheapest option given here making it perfect for all budget buyers who are on a tight budget. Since it is the cheapest option given here, its included monochrome LCD display is to be expected. But unlike other cheaper options, this one still includes an automatic identification function for NPN and PNP transistors.
In fact, you also get an auto-shutdown function with this transistor tester which is quite important since it uses a 9V battery for its power needs. However, being such an entry-level transistor tester, it does not offer any warranty which becomes an even bigger issue considering its barebones design.
Best Features
- Uses a monochrome LCD display for showing its readings
- Supports automatic identification for NPN and PNP transistors
- Offers an auto-shutdown function
Pros
- Highly affordable and budget-friendly transistor tester
- Offers a case for protecting its barebone design
- Handy automatic features for identification and power
Cons
- Not a reliable or durable transistor tester
8. AITRIP Transistor Tester
Without charging a premium for the same, AITRIP and its transistor testers happen to be a great option for all those who are looking for a complete package in terms of included accessories.
AITRIP’s transistor tester is the cheapest option given here which still includes handy accessories in the box at an affordable price tag. Even with a fairly low price tag, this transistor tester also features a colored LCD display for easily viewing everything. Apart from its easy to read display, you also get an automatic identification feature with it.
A great thing about this transistor tester is that you get an inbuilt battery with it which is rechargeable. However, it does not offer an automatic shutdown function which does affect its battery life a bit. Despite its lack of an included warranty, the build quality of this transistor tester alone makes it quite great for long term usage.
Best Features
- Uses a colored LCD display for showing its readings
- Supports automatic identification for NPN and PNP transistors
Pros
- Includes various accessories on a budget
- Great looking colored display for easily reading measurements
- Inbuilt battery for easy charging and ease of use
Cons
- Misses out on an auto-shutdown function
9. AIDEEPEN Transistor Tester
Aideepen and its electrical testing products like its transistor tester given here can be a great option for all those who are looking for something feature-rich and ideal for long-term usage.
This Aideepen transistor tester is the most feature-rich option given here since not only do you get high-end features with it, but it also includes various handy accessories in the box. Starting with its display, you will find a pretty large 1.8 inch colored LCD display. Just like most other transistor testers, this one also has automatic identification for NPN and PNP transistors.
Because this transistor tester relies on a 9V battery for its power requirement, it features an auto-shutdown function for extending its battery life as much as possible. Unfortunately, despite offering a fairly sturdy build quality, this transistor tester lacks any form of warranty.
Best Features
- Uses a colored LCD display for showing its readings
- Supports automatic identification for NPN and PNP transistors
- Offers an auto-shutdown function
Pros
- Perfect option for heavy-duty usage with various included features
- Features multiple handy accessories in the box
- Decent build quality for peace of mind
Cons
- Misses out on manufacturer warranty
Buying Guide for the Best Transistor Testers
Those of you who work on electrical circuits quite often must know that there are all sorts of components that you need to use for the same. Out of the various options out there, a transistor is something that gets used in almost all circuits.
But since choosing the right transistor is quite important for your circuits, you will need to use one of the best transistor testers given above. To help you in choosing the right transistor tester, we have explained some of the most important factors and aspects of all these transistor testers. And in case you wish to know further, make sure to check out this detailed buying guide for the best transistor testers:
1. Display
The display of a transistor tester is pivotal for clear readability and ease of use, directly impacting the efficiency of testing and troubleshooting electronic components.
Why it Matters: A well-defined display ensures that all readings are easily interpreted, reducing strain and errors.
What to Look For: Opt for a colored LCD display for better clarity and distinction between readings. Size also matters; a larger display, ideally 1.8 inches or more, offers greater visibility of data and icons compared to smaller ones. These factors combine to enhance user experience, making the testing process more accurate and less cumbersome.
2. Component Identification
Why it Matters: The ability to accurately identify components is crucial for efficient troubleshooting and analysis of electronic circuits. It allows for a quick assessment of component types, facilitating repairs or modifications.
What to Look For
- Automatic Identification: A transistor tester should automatically identify a wide array of components, such as NPN and PNP BJTs, MOSFETs, diodes, resistors, capacitors, and more. This feature saves time and reduces the risk of human error in component analysis.
- Other Identifications: The device should also be capable of identifying and displaying other critical component attributes, such as hFE (DC current gain) values for transistors, capacitance values, and resistance. These details are vital for understanding component performance and suitability for specific applications.
3. Measurement Range
Why it Matters: The measurement range of a transistor tester determines the spectrum of components it can test. A broad range allows for more versatility and application across different types of projects and components.
What to Look For
- Capacitance: A range from 0.01 µF to 10,000 µF is desirable, as it covers a vast array of capacitors from small ceramic ones to larger electrolytic types.
- Resistance: Look for a tester that can measure resistance from 0.1 ohms to 50M ohms. This range is broad enough to evaluate most resistors used in electronic circuits.
- Current and Voltage: While not all transistor testers measure current and voltage directly, those that do should offer a functional range that suits your testing needs. For voltage, a range of 0.1V to 50V is typical and adequate for low to medium voltage components.
4. Automatic Power Off
Why it Matters: An automatic power-off feature is essential for conserving battery life and preventing accidental power wastage. This feature ensures the tester turns off automatically after a period of inactivity, extending the life of the device and saving on maintenance costs.
What to Look For
- Adjustable Timer: Opt for testers with an adjustable automatic power-off timer. This allows you to set the duration of inactivity (e.g., 5, 10, 30 minutes) before the device automatically turns off. A range allowing customization provides flexibility according to your working habits and preferences.
- Battery Life Indicator: A battery life indicator, in conjunction with the automatic power-off feature, helps monitor the device’s power status, ensuring you’re never caught off guard by a dead battery. Look for models that alert you when the battery is low, allowing for timely replacements or recharging.
Transistor Tester – FAQs
Ans: Even though not all transistor testers may offer the same, many of them come with backlit displays. Because of this, their displays will light up in the dark making everything easier to read while taking measurements and readings.
Ans: Since almost all transistor testers out there feature automatic identification features, you do not have to switch manually for testing components other than a transistor. You can simply continue your testing and your transistor tester will keep switching automatically at all times.
Ans: Most transistor testers will come with included probes that allow you to test transistors that are already installed in a circuit. Some of them even feature a pin interface that allows you to install your transistor or any other component on your transistor tester for proper testing.
Conclusion
A transistor tester helps you figure out which type of transistor you need for your circuits. By using one, you ensure you’re using the correct components for your electrical setup. We’ve listed some top transistor testers and their key features.
- The ACEIRMC Transistor Tester is a budget-friendly option with a decently sized monochromatic LCD display and automatic identification for NPN and PNP transistors.
- The ICQUANZX Transistor Tester is also affordable and comes with a 1-year warranty. It features a monochromatic LCD display and automatic identification for various transistor types.
- For a more premium choice, consider the AIDEEPEN Transistor Tester. It comes with extras like cables and a battery. This tester boasts a 1.8-inch colored LCD display, automatic identification, and supports testing for both NPN and PNP transistors.
