---
title: "Db9 Connector — $60K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/electronics/db9-connector"
last_updated: "2026-08-11T12:56:59.070Z"
locale: en
meta:
description: "Niche score 49/100 · $60K/yr market · 51K searches/yr · $14.96 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 49/100 · $60K/yr market · 51K searches/yr · $14.96 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Db9 Connector — $60K/yr Amazon US Niche (2026) - Flapen"
---
# **db9 connector**
**Skip it**
A small market ($60K/yr) — this niche doesn't clear our bar today.
Market size 15Growth 23Conversion 78Competition 58Returns 83Price range 70Avg price 75Brand share 45Review moat 92Quality gap 22
**Review moat**
**Great****161.08**
avg incumbent reviews — the moat a new listing must climb
**Returns**
**Great****1.6%**
return rate — above 5% kills the launch gate
**Conversion**
**Great****7.8%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Great****$14.96**
avg listing price — sweet spot $15–$100
**Price range**
**Good****$5.82–$36.87**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Good****50%**
top-5 click share — leaders hold, buyers still browse
**Brand share**
**Okay****78%**
top-5 brand share — brands hold most of the demand
**Growth**
**Bad****-4.5%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Market size**
**Bad****$60K**
$60K/yr · 51K searches
**Signals**[** Low Review Barrier**](https://flapen.com/research/niches?market=us&signal=low_review_barrier "Top brand's reviews < 500")
According to Flapen's Amazon United States niche tracking, db9 connector is a $60K/yr Amazon United States market (51K searches/yr). The top 5 brands hold 78% of demand. Verdict: Skip it — 49/100.
Data updated Jul 21, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **db9 connector market data**
- **Units sold / yr**
- **5K–6K**
- avg 100–250/product
- **Revenue / yr**
- **$75K–$90K**
- units × avg price
- **Conversion rate**
- **7.8%**
- **Avg BSR**
- **#1,522**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **96%**
- **Out of stock**
- **0.7%**
- **Avg brand age**
- **77 months**
- **Avg seller age**
- **224 days**
## **Competition & brand share**
The top 5 products take 50% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**16 **—flat
**Sellers**
**22**
**Top-5 brand share**
**78%**
Top 20: 100%
**Top-5 click share**
**50%**
Top 20: 95%
**Open market**
**17%**
- ANMBEST35% - YIOVVOM17% - DTECH10% - JUXINICE9% - Tnuocke7% - Twinkle Bay5% - Open — no brand owns it (10 brands, 17%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -4.5% search growth over the last 90 days.
1K600 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.1×
[**Open Trend **](https://flapen.com/research/us/electronics/db9-connector/trend)
## **Top db9 connector search terms**
- **db9 connector**25K/yr+2.1%6.2% conv. - **db9 breakout**9K/yr-14.8%7.9% conv. - **db9**8K/yr-13.2%3.8% conv. - **db9 female connector**3K/yr+5.9%6.0% conv. - **db9 male connector**3K/yr+4.5%4.4% conv. - **db9 female**2K/yr-11.8%9.6% conv. - **rs232 connector**2K/yr-17.8%3.1% conv. [**All search terms **](https://flapen.com/research/us/electronics/db9-connector/search-terms)
## **Top db9 connector 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.
0%4%$2K8%$5K12%$7K16%$10K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**YIOVVOM DB9 Breakout Connector Male 9 pin RS232 connectors Solderless D-SUB RS485 Serial Adapter Module Board with Screw Terminals Case Long Bolts**YIOVVOM**$8.43**4.6★379 rev](https://www.amazon.com/dp/B071DS5GTW) [2**ANMBEST 10PCS DB9 Female Breakout Connector DB9 Solderless RS232 D-SUB Serial to 9-pin Port Terminal Adapter Connector Breakout Board with Case Long Bolts Tail Pipe**ANMBEST**$35.56**4.8★30 rev](https://www.amazon.com/dp/B09WCRYTP2) [3**ANMBEST DB9 Solder Connector 9PIN RS232 Terminal Adapter Breakout Board with Case Assortment Kit(10PCS Male + 10PCS Female)**ANMBEST**$16.27**4.5★80 rev](https://www.amazon.com/dp/B09698YCTZ) [4**DTECH DB9 Breakout Connector DB-9 Female RS232 Serial Adapter Solderless Module Board with Screw Terminals Block Case Long Bolts and Tail Pipes**DTECH**$7.83**4.6★73 rev](https://www.amazon.com/dp/B09L7HLTWC) [5**Tnuocke 18Pack DB9 Connector Adapter Kit 9 Pin D-SUB Male/Female Solder Cup Connectors Tin Plated Housing Lightweight Gray Plastic Hoods Individually Bagged**Tnuocke**$10.17**4.6★94 rev](https://www.amazon.com/dp/B09BZ4YZ9R)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Aurorapath 3-Pack DB9 Screw Terminal Block Male Plug Adapter D-SUB 9pin Breakout Adapter Plate Connector RS232 Serial to Terminal Board Signal Module**Aurorapath**$9.08**1 rev8mo ago](https://www.amazon.com/dp/B0G34B5N37) [**YAODHAOD DB9 Breakout Solderless Connector Female 9PIN RS232 Serial Adapter to Terminal Connector Signal Module with Case Screwdriver (DB9 Female Connector (2PCS))**YAODHAOD**$10.87**3 rev1y ago](https://www.amazon.com/dp/B0DJ262RR3) [**ANMBEST 4PCS DB9 Male Female Solderless Connector in One Breakout**ANMBEST**$18.28**3 rev3y ago](https://www.amazon.com/dp/B0CBJZSLCG) [**Jienk 2pcs DB9 Male to Female Terminal Breakout Board RS232 D-SUB Serial to 9pin Port Terminal Block Gender Changer Connector**Jienk**$14.06**9 rev4y ago](https://www.amazon.com/dp/B0B714YHDD) [**DTECH DB9 Breakout Connector DB-9 Female RS232 Serial Adapter Solderless Module Board with Screw Terminals Block Case Long Bolts and Tail Pipes**DTECH**$7.83**73 rev4y ago](https://www.amazon.com/dp/B09L7HLTWC)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Aurorapath 3-Pack DB9 Screw Terminal Block Male Plug Adapter D-SUB 9pin Breakout Adapter Plate Connector RS232 Serial to Terminal Board Signal Module**Aurorapath**$9.08**5.0★**▲ 245%**](https://www.amazon.com/dp/B0G34B5N37) [**TQDLYKHS 10 Pack DB9 Solder Connector Adapter Kit RS232 Serial Adapter**TQDLYKHS**$5.82**4.6★**▲ 62%**](https://www.amazon.com/dp/B0GD77VC21) [**ANMBEST 2PCS DB9 Solderless RS232 D-SUB Serial to 9-pin Port Terminal Male Adapter Connector Breakout Board with Case Long Bolts Tail Pipe (2PCS Female)**ANMBEST**$9.82**4.5★**▲ 42%**](https://www.amazon.com/dp/B07S7M24C3) [**BIFALE DB9 Breakout Connector (2 Male+2 Female) DB9 Solderless Connector RS232 D-SUB Serial Adapters 16mm thinner 9 Pin Port Terminal Breakout Board with Case Long Bolts Tail Pipe**BIFALE**$25.33**4.6★**▲ 42%**](https://www.amazon.com/dp/B08P77JSYF) [**OIKWAN USB to RS232 USB Serial Adapter with FTDI Chipset USB 2.0 to Male DB9 Serial Cable for Windows 11 10 8 7 Vista XP 2000 Linux and Mac OS(6ft)**OIKWAN**$12.97**4.6★**▲ 36%**](https://www.amazon.com/dp/B0759HSLP1)
**~~View all trending →~~**
## **What buyers say about db9 connector**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**20%
*“no quality control issues”*
**Connectivity-Overall**20%
*“it's really nice or quick connects without having to solder or crimp”*
**Ease Of Use**12%
*“easy to use”*
**Socket/Port/Plug**9%
*“The connector is just fine”*
**Value For Money**8%
*“It was cheap”*
**Advertised Vs Actual Product**4%
*“As advertised, high quality and worked fine”*
**Size-Overall**3%
*“They fit right”*
**Assembly/Installation**2%
*“has great ease of installation”*
**Efficiency**2%
*“Works fine”*
**Compatibility-Overall**2%
*“Worked perfect with my Windows 11 laptop”*
### **What buyers complain about **
**Connectivity-Overall**14%
*“so you have to be careful it doesn't disconnect while you're downloading information”*
**Quality-Overall**14%
*“Could be better... Poor build quality”*
**Rope/Wire Tangling**14%
*“Wire won't stay connected”*
**Socket/Port/Plug**10%
*“it will NOT communicate with the serial port”*
**Flatness**7%
*“These were more like flat tabs that were pretty difficult to get aligned to solder”*
**Assembly/Installation**5%
*“one piece seems thicker than it should making assembly a bit tricky”*
**Value For Money**5%
*“can't really afford these kinds of delays over a few bucks”*
**Thickness**5%
*“I found the piece that slides into the enclosure to be too thick”*
**Heating**5%
*“After that it got uncomfortably hot to the touch”*
### **Top return reasons **
**Compatibility-Overall**45%
**Connectivity-Overall**14%
**Functionality-Overall**13%
**Size-Overall**11%
**Socket/Port/Plug**4%
**Defective Material/Parts**3%
**Advertised Vs Actual Product**2%
**Value For Money**2%
**Quality-Overall**1%
**Assembly/Installation**0%
## **Common questions**
- **Is db9 connector profitable to sell on Amazon United States?**
- The niche generates $60K/yr across 26 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -4.5%. Flapen's verdict: Skip it (49/100).
- **How competitive is the db9 connector niche?**
- 16 brands and 22 sellers compete. The top 5 products take 50% of clicks and top 5 brands hold 78% of demand.
- **What do buyers complain about in db9 connector?**
- Top complaints mined from reviews: Connectivity-Overall, Quality-Overall, Rope/Wire Tangling. The return rate is 1.6%.
- **When does demand for db9 connector peak?**
- Demand is steady year-round — the busiest month runs 1.1× the quietest.
- **What does it cost to enter the db9 connector niche?**
- Listings span $5.82–$36.87; the average listing price is $14.96 (sweet spot $15–$100). The average incumbent carries 161 reviews — the moat a new listing must climb.
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