--- product_id: 276696985 title: "AiTrip LCR-T4 Mega328 Digital Transistor Tester Resistance Capacitance Diode Triode Capacitance Resistance ESR Meter MOS PNP NPN LCR with Case (No Battery)" brand: "aitrip" price: "NT$2102" currency: TWD in_stock: true reviews_count: 5 category: "Aitrip" url: https://www.desertcart.tw/products/276696985-aitrip-lcr-t4-mega328-digital-transistor-tester-resistance-capacitance-diode store_origin: TW region: Taiwan --- # 2s ultra-fast test speed 128x64 backlit LCD display Auto power-off saves battery AiTrip LCR-T4 Mega328 Digital Transistor Tester Resistance Capacitance Diode Triode Capacitance Resistance ESR Meter MOS PNP NPN LCR with Case (No Battery) **Brand:** aitrip **Price:** NT$2102 **Availability:** ✅ In Stock ## Summary > ⚙️ Master your electronics bench with precision and speed! ## Quick Answers - **What is this?** AiTrip LCR-T4 Mega328 Digital Transistor Tester Resistance Capacitance Diode Triode Capacitance Resistance ESR Meter MOS PNP NPN LCR with Case (No Battery) by aitrip - **How much does it cost?** NT$2102 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/276696985-aitrip-lcr-t4-mega328-digital-transistor-tester-resistance-capacitance-diode) ## Best For - aitrip enthusiasts ## Why This Product - Trusted aitrip brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Pro-Grade Precision:** Measure ESR, forward bias voltage, and gate threshold voltage with professional accuracy. - • **Crystal-Clear Display:** Large 128x64 backlit LCD ensures you never miss a detail, even in low light. - • **Smart Power Management:** Automatic shutdown and ultra-low standby current extend battery life for longer bench sessions. - • **Lightning-Fast Diagnostics:** Get accurate readings in just 2 seconds—no more waiting around. - • **All-in-One Component Testing:** Seamlessly test transistors, MOSFETs, diodes, capacitors, resistors, and more with one device. ## Overview The AiTrip LCR-T4 Mega328 is a compact, battery-powered digital tester designed for professionals and enthusiasts to quickly and accurately measure a wide range of electronic components including transistors, MOSFETs, diodes, capacitors, resistors, and ESR. Featuring a large backlit LCD, ultra-fast 2-second test speed, and smart power-saving auto shutoff, it delivers pro-level diagnostics in a sleek, portable package—perfect for modern electronics workbenches. ## Description Features: 1. Support boot voltage detection function 2. Automatic detection of NPN and PNP transistors, N-channel and P-channel MOSFETs, diodes (including dual diodes), thyristors, triodes, resistors, and capacitors. Automatically testing the component leads and displaying them on the LCD 3. The forward bias voltage of the emitter transistor can be determined by detecting the amplification factor and base number of a transistor, a MOSFET protection diode, and the like 4. Measure gate threshold voltage and gate capacitance MOSFET 5. The display uses 12864 lcd LCD (128 * 64 characters) 6. High test speed, valid component test: In 2 seconds (except in larger capacitors, large capacitance measurement also takes a long time, the measurement time in 1 minute is normal) 7. One-button operation, power-on test. 8. Power Consumption Shutdown Mode: Less than 20 nA 9. Automatic shutdown function can avoid unnecessary waste, save battery energy and improve battery life. Note: Please make sure that capacitors are discharged before testing. Battery is not included.Please tear off the paper outside the case. Specifications: Material: PCB Display: 128 x 64 LCD Normal Testing Speed: 2 seconds Shutdown Current: 20nA Package included: 1 x Transistor Tester with case Review: Great little component tester - works for most basic components - Exactly what I was expecting. I had read and watched various reviews - including the one from Dave Jones at EEVBlog - and I was convinced it was worth picking one up. Especially important when one has a box of no-brand transistors and different manufacturers wire the emitter, base and collector differently for the same model. The included case and local US Prime delivery made this one worth the extra few dollars over getting one on ebay. Works great. I have been using it on the bench for doing some transistor and capacitor testing as well as some resistor categorizing from a grab-box I picked up recently. (Yes - I can read color codes ;-) but sometimes the bands on metal film blue cases can be tricky to distinguish for some colors). Seemed to fare pretty well compared to my digital multimeter. Make sure you follow the calibration instructions which you can find in various YT videos: in essence, hold down the button, short 1,2 and 3 with something - I used two breadboard jumpers - and then put in a capacitor when prompted. Above that - hats off to the vendor :-) The case had a small crack in the front plastic piece. I contacted them with pictures showing the issue and they didn't just send me a new front piece but a whole new unit. Excellent customer service - THANK YOU! Review: You need this on your bench! - Please see my updated review at the bottom. Sorry this is a bit wordy, but it is for good reason. My review is based on perspective obtained from making my living repairing and designing circuitry in electronics products. Before I purchased this little gem, I saw reviews making critical comments about the contrast, the “supposed” issues with the plexiglass case, having to open the case when replacing the battery and so on. As someone who has worked on countless products, I thought it would be interesting to check out not only the operation and accuracy of this unit, but also why people complained about breaking or having to modify the case to fit, the contrast and so on. Being no stranger to quality test bench gear, I was very surprised at the quality and accuracy of this unit! For a mere $13, you get a transistor, diode and capacitor tester, unheard of just a few years ago. Electrolytic and tantalum caps are the worst offenders in the capacitor-world and this product does an excellent job of reporting their capacitance value AND ESR value! I had absolutely no issues with the case either….all pieces fit and interlocked together and it took maybe 10 minutes to get it together, most of that time was spent peeling off the protective covering! I found the contrast to be very acceptable and you can always change your viewing angle if it doesn’t suit you. You’re only needing to look at the screen for a few seconds anyway so I consider this another non -issue. Replacing the battery does requires removing the top of the case, but this unit times-out 30 seconds after a test so battery life should not be an issue, and when you do, it takes 5 minutes….remember, this cost $13 and does things a MUCH more expensive unit does. I’m not saying you’ll never need any other test gear, but I am saying those who complain are probably weekend warrior “tech” folks who are relatively inexperienced and can’t grasp the value this very inexpensive unit represents because they’ve never spent big money on test gear in the past, so understandably, they have a limited perspective, and if it dies in 6 months which I doubt, it is still worth it and I would purchase another one. For $13 you have a couple of choices, buy this or buy a couple of Fru Fru Lattes and see which one is around the next day. Enjoy! (see photos) UPDATED REVIEW: June 2025 The one important thing to be aware of is to discharge capacitors BEFORE measuring them, as the tester can/will be damaged by stored voltage that’s present on a charged cap. I knew to do this, but was working faster than usual one day and forgot and it’s now a mini doorstop😝 I recently bought another to replace it for just a few dollars more than the original and hopefully won’t forget again, but if I do they are inexpensive enough that I won’t feel bad about it. ## Features - Test ranges:Inductors, capacitors , diodes, dual diode , mos, transistor, SCR , the regulator, LED tube, ESR, Resistance, Adjustable potentiometer - Can detect the transistor, MOSFET protection diode amplification coefficient and the base to determine the emitter transistor forward biased voltage. - High test speed, valid component test: 2 seconds (except in the larger capacitor of large capacitance measurement also takes a long time, the measured time of one minute is normal) - 128*64 big Backlight LCD display,only 2mA when stand by. - Auto power off function to avoid unnecessary waste, saving battery power, improved battery life ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07WT9VVZB | | Best Sellers Rank | #254,151 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,246 in Multi Testers | | Brand | AITRIP | | Brand Name | AITRIP | | Customer Reviews | 4.3 out of 5 stars 386 Reviews | | Item Weight | 0.01 Kilograms | | Item weight | 0.01 Kilograms | | Manufacturer | AiTrip | | Measurement Type | ESR meter | | Measurement type | ESR meter | | Model | 15370 | | Part Number | 15370 | | Power Source | Battery Powered | | Power source | Battery Powered | | Style | Modern | | Style Name | Modern | ## Product Details - **Brand:** AITRIP - **Color:** Transparent, green, yellow - **Item Weight:** 0.01 Kilograms - **Power Source:** Battery Powered - **Style:** Digital ## Images ![AiTrip LCR-T4 Mega328 Digital Transistor Tester Resistance Capacitance Diode Triode Capacitance Resistance ESR Meter MOS PNP NPN LCR with Case (No Battery) - Image 1](https://m.media-amazon.com/images/I/61FgayXzl4L.jpg) ![AiTrip LCR-T4 Mega328 Digital Transistor Tester Resistance Capacitance Diode Triode Capacitance Resistance ESR Meter MOS PNP NPN LCR with Case (No Battery) - Image 2](https://m.media-amazon.com/images/I/51ztkRIj9AL.jpg) ![AiTrip LCR-T4 Mega328 Digital Transistor Tester Resistance Capacitance Diode Triode Capacitance Resistance ESR Meter MOS PNP NPN LCR with Case (No Battery) - Image 3](https://m.media-amazon.com/images/I/51eIC3uGXcL.jpg) ![AiTrip LCR-T4 Mega328 Digital Transistor Tester Resistance Capacitance Diode Triode Capacitance Resistance ESR Meter MOS PNP NPN LCR with Case (No Battery) - Image 4](https://m.media-amazon.com/images/I/71nJibh6FOL.jpg) ![AiTrip LCR-T4 Mega328 Digital Transistor Tester Resistance Capacitance Diode Triode Capacitance Resistance ESR Meter MOS PNP NPN LCR with Case (No Battery) - Image 5](https://m.media-amazon.com/images/I/51WmC04WdfL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great little component tester - works for most basic components *by W***E on 20 November 2019* Exactly what I was expecting. I had read and watched various reviews - including the one from Dave Jones at EEVBlog - and I was convinced it was worth picking one up. Especially important when one has a box of no-brand transistors and different manufacturers wire the emitter, base and collector differently for the same model. The included case and local US Prime delivery made this one worth the extra few dollars over getting one on ebay. Works great. I have been using it on the bench for doing some transistor and capacitor testing as well as some resistor categorizing from a grab-box I picked up recently. (Yes - I can read color codes ;-) but sometimes the bands on metal film blue cases can be tricky to distinguish for some colors). Seemed to fare pretty well compared to my digital multimeter. Make sure you follow the calibration instructions which you can find in various YT videos: in essence, hold down the button, short 1,2 and 3 with something - I used two breadboard jumpers - and then put in a capacitor when prompted. Above that - hats off to the vendor :-) The case had a small crack in the front plastic piece. I contacted them with pictures showing the issue and they didn't just send me a new front piece but a whole new unit. Excellent customer service - THANK YOU! ### ⭐⭐⭐⭐⭐ You need this on your bench! *by T***D on 25 August 2021* Please see my updated review at the bottom. Sorry this is a bit wordy, but it is for good reason. My review is based on perspective obtained from making my living repairing and designing circuitry in electronics products. Before I purchased this little gem, I saw reviews making critical comments about the contrast, the “supposed” issues with the plexiglass case, having to open the case when replacing the battery and so on. As someone who has worked on countless products, I thought it would be interesting to check out not only the operation and accuracy of this unit, but also why people complained about breaking or having to modify the case to fit, the contrast and so on. Being no stranger to quality test bench gear, I was very surprised at the quality and accuracy of this unit! For a mere $13, you get a transistor, diode and capacitor tester, unheard of just a few years ago. Electrolytic and tantalum caps are the worst offenders in the capacitor-world and this product does an excellent job of reporting their capacitance value AND ESR value! I had absolutely no issues with the case either….all pieces fit and interlocked together and it took maybe 10 minutes to get it together, most of that time was spent peeling off the protective covering! I found the contrast to be very acceptable and you can always change your viewing angle if it doesn’t suit you. You’re only needing to look at the screen for a few seconds anyway so I consider this another non -issue. Replacing the battery does requires removing the top of the case, but this unit times-out 30 seconds after a test so battery life should not be an issue, and when you do, it takes 5 minutes….remember, this cost $13 and does things a MUCH more expensive unit does. I’m not saying you’ll never need any other test gear, but I am saying those who complain are probably weekend warrior “tech” folks who are relatively inexperienced and can’t grasp the value this very inexpensive unit represents because they’ve never spent big money on test gear in the past, so understandably, they have a limited perspective, and if it dies in 6 months which I doubt, it is still worth it and I would purchase another one. For $13 you have a couple of choices, buy this or buy a couple of Fru Fru Lattes and see which one is around the next day. Enjoy! (see photos) UPDATED REVIEW: June 2025 The one important thing to be aware of is to discharge capacitors BEFORE measuring them, as the tester can/will be damaged by stored voltage that’s present on a charged cap. I knew to do this, but was working faster than usual one day and forgot and it’s now a mini doorstop😝 I recently bought another to replace it for just a few dollars more than the original and hopefully won’t forget again, but if I do they are inexpensive enough that I won’t feel bad about it. ### ⭐⭐⭐⭐ Excellent electronics, subpar case *by M***R on 28 January 2024* This component tester works very well. I tried it on several components and it did an excellent job quickly and accurately measuring the component type and value. It even correctly measured a field effect transistor. The case it comes with is not terribly useful. It's finicky to assemble but sturdy once it's all together. The problem is that you have to disassemble the entire unit to replace the battery, and once in place the battery is unsecured so it rattles around. I ended up 3D printing a different case that overcomes those problems. All in all a good value for the money. ## Frequently Bought Together - LCR-T4 Mega328 Digital Transistor Tester Resistance Capacitance Diode Triode Capacitance Resistance ESR Meter MOS PNP NPN LCR with Case - WGGE WG-026 10 Pieces and 5 Colors Test Lead Set & Alligator Clips,20.5 inches / 22 AWG Copper Wire. The Clips soldered and Stamped to The Wires. 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