relay
Skip itSoft demand (-13.9% this quarter) — this niche doesn't clear our bar today.
Returns
Great1.8%return rate — above 6% kills the launch gate
Avg price
Good$13.71avg listing price — sweet spot $15–$100
Review moat
Good1,004.57avg incumbent reviews — the moat a new listing must climb
Price range
Good$5.92–$29.41cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Good$452K$452K/yr · 827K searches
Conversion
Okay4.0%search→purchase rate — share of searches ending in a sale
Competition
Okay63%top-5 click share — leaders hold, buyers still browse
Quality gap
Okay4.6★avg incumbent rating — lower means beatable quality
Brand share
Bad92%top-5 brand share — brand-locked demand
Growth
Bad-13.9%90-day search growth — must beat 0% to launch
Competition
The top 5 products take 63% of clicks — established leaders, but buyers still shop beyond them.Brands
9 falling
Sellers
16
Top-5 brand share
92%
Open market
5%
- iRhapsody36%
- Nilight21%
- Gebildet19%
- AEDIKO9%
- ecocstm7%
- Weasch3%
- Open — no brand owns it (3 brands, 5%)
Product shelf
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 23 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
irhapsody 5 Pack 40/30 AMP 12V DC Waterproof Relay Kit with Heavy-Duty Pigtail 5-PIN SPDT Automotive Relay
iRhapsody$25.554.7★3,540 rev
Gebildet 2pcs 12V 40A 4 Pin SPST Car Relay Harness JD1912 12AWG Harness Sockets with Built-in Diode for Automotive Truck Van Boat Motorcycle
Gebildet$8.044.7★2,361 rev
Nilight 50003R Automotive Set 5-Pin 30/40A 12V SPDT with Interlocking Relay Socket and Wiring Harness-5 Pack 2 Years Warranty
Nilight$12.534.6★3,431 rev
irhapsody 4-pin 40/30AMP 12V DC Waterproof Relay with Heavy Duty Wires SPST Automotive Relay Pack of 1
iRhapsody$10.034.7★983 rev
4 PCS Relays 5 Pin Relay 40A Waterproof Car Relays 12V Relay Switch for Electric Cooling Fans Motor Starters Automotive Taillights
ecocstm$8.524.3★302 rev
Newest
by launch date4 PCS Relays 5 Pin Relay 40A Waterproof Car Relays 12V Relay Switch for Electric Cooling Fans Motor Starters Automotive Taillights
ecocstm$8.52302 rev
Weasch Waterproof Relay Kit 12V 40A 4 Pin SPST Heavy Duty 14 AWG Tinned Copper Wires Automotive Relay and Harness Set for Automotive Car Marine Boat
Weasch$6.76132 rev
Weasch 2 Pack JD1912 Car Relay 12V 40A 4 Pins SPST Automotive Switches and Starters Waterproof Relay for Boat Tractor Truck Motorcycle (2)
Weasch$5.96207 rev
DaierTek 12V Relay Box 6 Way12 AWG Pre-Wired Waterproof Relay Box 6 Slot ATC/ATO Fuse Relay Block Universal Relay Panel for Automotive Car Marine Boat
DAIERTEK$25.82505 rev
irhapsody 12vdc 30amp 4-pin Spst Multi-Purpose Starter Relay Automotive Replacement Relays
iRhapsody$12.76376 rev
Trending
90-day click momentumWeasch Waterproof Relay Kit 12V 40A 4 Pin SPST Heavy Duty 14 AWG Tinned Copper Wires Automotive Relay and Harness Set for Automotive Car Marine Boat
Weasch$6.764.8★
AEDIKO 10pcs DC 5V Relay Module - 1 Channel Relay Switch Board with Optocoupler Isolation High or Low Level Trigger
AEDIKO$12.114.4★
irhapsody 12vdc 30amp 4-pin Spst Multi-Purpose Starter Relay Automotive Replacement Relays
iRhapsody$12.764.6★
AEDIKO 4pcs DC 5V Relay Module - 1 Channel Relay Switch Board with Optocoupler Isolation High or Low Level Trigger
AEDIKO$7.074.5★
irhapsody 12v 30A 5-pin Spdt Multi-Purpose Starter Relay
iRhapsody$12.804.6★
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -13.9% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.3×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“The build quality is impressive for the price point”
“Reasonable price”
“Works flawlessly”
“Worked as it should”
“Easy to install”
“fit perfect”
“Easy to use, waterproof, solid construction”
“Easy to use”
“Versatile”
“The product is still very functional”
What buyers complain about
“not as good as you might think from the description”
“Does not fit”
“Falsely advertised”
“No Instructions”
“still no function”
“Not for starter relay 08-12 Sedona”
“Dead wthin a year”
“Loud”
“No Way These Are 80 Amp Relays”
“And dont come at me with connections or correct wiring”