Is 12v 3a power supply profitable to sell on Amazon United States?

The niche generates $104K/yr across 8 tracked products. 90-day search growth is -0.6%. Flapen's verdict: Skip it (33/100).

How competitive is the 12v 3a power supply niche?

7 brands and 10 sellers compete. The top 5 products take 91% of clicks and top 5 brands hold 93% of demand.

What do buyers complain about in 12v 3a power supply?

Top complaints mined from reviews: Charging, Functionality-Overall, Durability. The return rate is 4.1%.

When does demand for 12v 3a power supply peak?

Demand is steady year-round — the busiest month runs 1.2× the quietest.

What does it cost to enter the 12v 3a power supply niche?

Listings span $7.39–$16.27; the average listing price is $10.55 (sweet spot $15–$100). The average incumbent carries 1,432 reviews — the moat a new listing must climb.

12v 3a power supply

Skip it

A concentrated shelf (top 5 take 91% of clicks) — this niche doesn't clear our bar today.

Conversion

Incredible12.2%

search→purchase rate — share of searches ending in a sale

Review moat

Good1,431.88

avg incumbent reviews — the moat a new listing must climb

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Avg price

Okay$10.55

avg listing price — sweet spot $15–$100

Returns

Okay4.1%

return rate — above 5% kills the launch gate

Market size

Okay$104K

$104K/yr · 81K searches

Growth

Bad-0.6%

90-day search growth — must beat 0% to launch

Brand share

Bad93%

top-5 brand share — brand-locked demand

Price range

Bad$7.39–$16.27

cheapest to priciest tracked listing — scored on the share inside $15–$100

Competition

Bad91%

top-5 click share — a locked-up shelf

According to Flapen's Amazon United States niche tracking, 12v 3a power supply is a $104K/yr Amazon United States market (81K searches/yr). The top 5 brands hold 93% of demand. Verdict: Skip it — 33/100.

Data updated Jul 22, 2026 · scored weekly · How we score niches

12v 3a power supply market data

Units sold / yr: 10K–13K; avg 1,000–1,250/product
Revenue / yr: $106K–$132K; units × avg price
Conversion rate: 12.2%
Avg BSR: #2
Page quality: 0%
Prime: 100%
Sponsored: 88%
Out of stock: 0.0%
Avg brand age: 50 months
Avg seller age: 209 days

Competition & brand share

The top 5 products capture 91% of clicks — a locked-up shelf that new listings rarely crack.

Brands

7 falling

Sellers

Top-5 brand share

93%

Top 20: 100%

Top-5 click share

91%

Top 20: 100%

Open market

Facmogu38%
ALITOVE23%
LitStar13%
Arkare12%
Aclorol7%
GuanTing5%
Open — no brand owns it (1 brand, 3%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -0.6% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.2×

Open Trend

Top 12v 3a power supply search terms

12v 3a power supply29K/yr -2.2%9.2% conv.
12v 3a+ power supply11K/yr +7.2%9.6% conv.
12v 3a power adapter9K/yr -15.1%7.5% conv.
12v 3 amp power supply6K/yr -5.3%8.3% conv.
12v 3a5K/yr -4.1%9.5% conv.
power adapter (12v - 3a)4K/yr +12.0%5.2% conv.
12 volt 3 amp power supply4K/yr +3.8%8.3% conv.
12v 3amp dc power supply4K/yr +7.1%8.8% conv.
12v/3a power supply3K/yr +16.9%8.1% conv.
dc 12v 3a power cord3K/yr +23.6%11.9% conv.

All search terms

Top 12v 3a power supply 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 8 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Facmogu DC 12V 3A Power Adapter 100-240V AC to DC 12V 3A 36W Power Suppy with Barrel Connector 5.5x2.5mm & 5.5x2.1mm 12 Volt 3 Amp Desktop Adpater 12V Switching Transformer AC/DC Power Converter

Facmogu$10.104.5★3,662 rev

ALITOVE 12V DC Power Supply 3A 36W Universal AC Adapter 100-240V 50-60hz to 12 Volt Power Adapter Cord 3Amp 2.5A 2A 5.5mm x 2.5mm 2.1mm for LED Strip Light CCTV Security Camera PC Monitor and More

ALITOVE$9.924.5★1,154 rev

12V 3A AC Adapter Power Supply

LitStar$9.884.5★404 rev

Arkare 12V 3A Power Supply Adapter 36W ac/dc Charger AC 100V-240V to DC 12Volt 3amp Power Cord 12V 2.5A 2A 1.5A 1A 800mA 500mA for Security Camera BT Speaker GPS Webcam Microphone Receiver with 10TIPS

Arkare$10.014.3★507 rev

Aclorol 12V 3A Power Supply Adapter 36W 100V-240V AC to DC 12Volts Converter Adapter Transformer 3amp 2.8A2.5A2A1.5A 5.5x2.5mm 2.1mm for WS2811 12V LED Strip Light Wireless Router ADSL Cats IP Camera

Aclorol$7.954.5★137 rev

Newest

by launch date

12V 3A Power Supply ac Adapter DC12Volts 3Amps 2A 1A 500mA Power Adapter 5.5mmx2.5mm/2.1mm Plug DC12V Charger Inverter Transformer

GuanTing$7.3979 rev

2y ago

Arkare$10.01507 rev

4y ago

Aclorol 12V 3A Power Supply Adapter 36W 100V-240V AC to DC 12Volts Converter Adapter Transformer 3amp 2.8A2.5A2A1.5A 5.5x2.5mm 2.1mm for WS2811 12V LED Strip Light Wireless Router ADSL Cats IP Camera

Aclorol$7.95137 rev

4y ago

12V 3A AC Adapter Power Supply

LitStar$9.88404 rev

6y ago

ALITOVE 12V DC Power Supply 3A 36W Universal AC Adapter 100-240V 50-60hz to 12 Volt Power Adapter Cord 3Amp 2.5A 2A 5.5mm x 2.5mm 2.1mm for LED Strip Light CCTV Security Camera PC Monitor and More

ALITOVE$9.921,154 rev

7y ago

What buyers say about 12v 3a power supply

What buyers praise and complain about, mined from review topics.

What buyers love

Advertised Vs Actual Product28%

“Excellent product as advertised work perfectly”

Compatibility-Overall20%

“Worked perfect for my arcade1up”

Quality-Overall13%

“Build quality feels solid”

Size-Overall8%

“this fit perfectly”

Value For Money7%

“Great value”

Charging5%

“Good power supply”

Design-Overall4%

“Worked as designed”

Functionality-Overall3%

“The adapter worked fine”

Ease Of Use3%

“Very easy to use”

Data Transfer Speed2%

“Was able to immediately access my data”

What buyers complain about

Charging14%

“mess with the cord for it to charge”

Functionality-Overall13%

“the adapter itself was not working”

Durability13%

“Failed after 3 months”

Size-Overall11%

“It is much shorter than I was expecting”

Noise Level7%

“I found mine making a noise”

Quality-Overall7%

“The polarity is backwards”

Advertised Vs Actual Product5%

“1st one did not include the 2.1mm like the description”

Heating5%

“It heats up too soon”

Compatibility-Overall5%

“Did not fit my AT&T modem”

Socket/Port/Plug4%

“the port plug is loose”

Top return reasons

Size-Overall32%

Compatibility-Overall29%

Functionality-Overall9%

Charging8%

Connectivity-Overall7%

Defective Material/Parts3%

Socket/Port/Plug2%

Advertised Vs Actual Product2%

Value For Money1%

Length1%

Common questions

Is 12v 3a power supply profitable to sell on Amazon United States?: The niche generates $104K/yr across 8 tracked products. 90-day search growth is -0.6%. Flapen's verdict: Skip it (33/100).
How competitive is the 12v 3a power supply niche?: 7 brands and 10 sellers compete. The top 5 products take 91% of clicks and top 5 brands hold 93% of demand.
What do buyers complain about in 12v 3a power supply?: Top complaints mined from reviews: Charging, Functionality-Overall, Durability. The return rate is 4.1%.
When does demand for 12v 3a power supply peak?: Demand is steady year-round — the busiest month runs 1.2× the quietest.
What does it cost to enter the 12v 3a power supply niche?: Listings span $7.39–$16.27; the average listing price is $10.55 (sweet spot $15–$100). The average incumbent carries 1,432 reviews — the moat a new listing must climb.