transistor tester
Worth a lookShows a thin review moat (271 avg reviews), but brand-locked demand (top 5 brands take 98% of clicks) keeps it on the watch list.
Review moat
Great270.83avg incumbent reviews — the moat a new listing must climb
Avg price
Great$82.99avg listing price — sweet spot $15–$100
Competition
Good44%top-5 click share — leaders hold, buyers still browse
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Market size
Good$371K$371K/yr · 166K searches
Growth
Good+22.9%90-day search growth — must beat 0% to launch
Returns
Okay3.2%return rate — above 5% kills the launch gate
Conversion
Okay2.7%search→purchase rate — share of searches ending in a sale
Price range
Okay$13.97–$262.94cheapest to priciest tracked listing — scored on the share inside $15–$100
Brand share
Bad98%top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, transistor tester is a $371K/yr Amazon United States market (166K searches/yr). The top 5 brands hold 98% of demand. Demand peaks in Nov. Verdict: Worth a look — 51/100.
Data updated Jul 27, 2026 · scored weekly · How we score niches
transistor tester market data
- Units sold / yr
- 3K–4K
- avg 0–100/product
- Revenue / yr
- $249K–$332K
- units × avg price
- Conversion rate
- 2.7%
- Avg BSR
- #69
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 97%
- Out of stock
- 2.4%
- Avg brand age
- 37 months
- Avg seller age
- 168 days
Competition & brand share
The top 5 products take 44% of clicks — established leaders, but buyers still shop beyond them.Brands
7 falling
Sellers
14
Top-5 brand share
98%
Top 20: 100%
Top-5 click share
44%
Top 20: 84%
Open market
1%
- FNIRSI91%
- Velleman3%
- diymore2%
- FORIOT2%
- WESTOBiG1%
- HiLetgo1%
- Open — no brand owns it (1 brand, 1%)
Demand & seasonality
Weekly Amazon search volume, last 85 weeks — +22.9% search growth over the last 90 days.Peak months: Nov · busiest ÷ quietest = 1.9×
Top transistor tester search terms
- fnirsi108K/yr
- transistor tester27K/yr
- component tester12K/yr
- fnrsi7K/yr
- electronic component tester5K/yr
- finirsi3K/yr
- diode tester4K/yr
Top transistor tester products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
FNIRSI LCR-P1 Transistor Tester Mosfet Transistor Capacitor Tester SMD Electronic Component Tester Diode Triode Zener Diode Resistance Inductance Battery Test LCR Meter MOS PNP NPN ESR Meter
FNIRSI$30.754.3★808 rev
FNIRSI 2C53T Upgraded Handheld Oscilloscope 50MHz Bandwidth 3IN1 Digital Oscilloscope Multimeter DDS Generator 250MS/s Sampling Rate 19999 Counts Voltage Current Capacitor Resistor Diode Test
FNIRSI$91.064.4★772 rev
FNIRSI HS-02A 100W Portable Corded Soldering Iron Kit 3S Fast Heating 212-842 Pre-set 3 Groups Temperature 6 F245 Soldering Tips Smart Digital Soldering Iron Pen Tool for Electronics Repair
FNIRSI$82.984.3★333 rev
FNIRSI DPS-150 DC Power Supply Variable 30V 5A Adjustable DC CNC Power Supply with 4-Digit IPS Display <20mV Power Ripple PD/QC/DC Input PC Programmable Switching Power Supply (NO Power Adapter)
FNIRSI$59.564.4★304 rev
FNIRSI DMC-100 Clamp Meter 10000 Counts TRMS 600A AC/DC Amp Meter with Curve Recording & 2 TFT Screen Rechargeable Multimeter Measuring Voltage Current Resistance Capacitance NCV for HVAC Auto
FNIRSI$45.864.6★729 rev
Newest
by launch date
FNIRSI HS-03 Cordless Soldering Iron Kit 2600mAh Battery Portable Soldering Iron 212-842F 3s Fast Heating 5-Level Temp 0.96 IPS Display Soldering Iron for Electronics Repair DIY PCB
FNIRSI$65.8183 rev
FNIRSI TDM-120P 2-in-1 Thermal Imaging Multimeter 19999 Counts Digital Multimeter TRMS & 120x90 IR Resolution Thermal Camera Infrared Imager with 2.8 Touchscreen for HVAC Electrical & Auto Repair
FNIRSI$185.6225 rev
FNIRSI HS-01 Digital Soldering Iron Kit DC/PD 96W/65W Fast Heating 180-780 Adjustable Temperature OLED Digital Display Auto Sleep Function 6 Soldering Tips for Precision Electronics Repair
FNIRSI$55.063 rev
FNIRSI LPM-10A Ethernet Tester Network Cable Tester Kit for CAT5 CAT6 RJ11 RJ45 Wire Tracer & Cable Toner PoE/NCV/Length Test Rechargeable Ethernet Cable Tester
FNIRSI$66.0858 rev
FNIRSI LC1020E 100kHz LCR Meter 19 999 Counts Resistor Inductor Capacitor Tester Auto Component Detect Measures ESR/Q/D//X 2.8 Color TFT Dual Parameter Display Sorting & Open/Short Calibration
FNIRSI$71.78238 rev
Trending
90-day click momentumFNIRSI HS-03 Cordless Soldering Iron Kit 2600mAh Battery Portable Soldering Iron 212-842F 3s Fast Heating 5-Level Temp 0.96 IPS Display Soldering Iron for Electronics Repair DIY PCB
FNIRSI$65.814.6★
FNIRSI TDM-120P 2-in-1 Thermal Imaging Multimeter 19999 Counts Digital Multimeter TRMS & 120x90 IR Resolution Thermal Camera Infrared Imager with 2.8 Touchscreen for HVAC Electrical & Auto Repair
FNIRSI$185.624.7★
FNIRSI LPM-10A Ethernet Tester Network Cable Tester Kit for CAT5 CAT6 RJ11 RJ45 Wire Tracer & Cable Toner PoE/NCV/Length Test Rechargeable Ethernet Cable Tester
FNIRSI$66.084.4★
FNIRSI HS-01 Digital Soldering Iron Kit DC/PD 96W/65W Fast Heating 180-780 Adjustable Temperature OLED Digital Display Auto Sleep Function 6 Soldering Tips for Precision Electronics Repair
FNIRSI$55.065.0★
Transistor Tester FORIOT LCR Meter LCR-TC1 Multi-Function Transistor Meter ESR Tester with TFT Full Color Display Capacitor Detector for LCR ESR PNP NPN Zener Diode
FORIOT$19.364.3★
What buyers say about transistor tester
What buyers praise and complain about, mined from review topics.What buyers love
“Great Value”
“build quality is great”
“Very handy”
“Works as Advertised”
“Great for the portability”
“the rechargeable battery has been very convenient”
“The design is simple”
“Holds a charge for a LONG time”
“holds the heat well”
“Easy to read display”
What buyers complain about
“Not working well”
“Durability and Quality are low”
“it has no instructions”
“Broke”
“Not user friendly”
“short battery run time”
“The device consistently produced inaccurate and unrealistic readings”
“Unknown how this meter can be purchased at this price”
“Display is poor”
“it seems like it takes a long time to charge”
Top return reasons
Common questions
- Is transistor tester profitable to sell on Amazon United States?
- The niche generates $371K/yr across 35 tracked products. 7 of 8 products launched in the last 360 days are still selling. 90-day search growth is +22.9%. Flapen's verdict: Worth a look (51/100).
- How competitive is the transistor tester niche?
- 7 brands and 14 sellers compete. The top 5 products take 44% of clicks and top 5 brands hold 98% of demand.
- What do buyers complain about in transistor tester?
- Top complaints mined from reviews: Functionality-Overall, Quality-Overall, Instructions/User Manual/Troubleshooting. The return rate is 3.2%.
- When does demand for transistor tester peak?
- Demand peaks in Nov; the busiest month runs 1.9× the quietest.
- What does it cost to enter the transistor tester niche?
- Listings span $13.97–$262.94; the average listing price is $82.99 (sweet spot $15–$100). The average incumbent carries 271 reviews — the moat a new listing must climb.