Relay
FailDemand is soft, at -13.9% this quarter, so Relay is a Fail.
- Flapen Score
- 44 / 100Ranks 5,081 of 7,287 Automotive niches · −5 vs the category median of 4944
- Market size
- $452K/yr827K searches / yr
- 90-day growth
- -13.9%search demand this quarter
- Competition
- 63%top-5 click share · 9 brands · 16 sellers
Flapen Score
Relay against its category
The dotted line is the Automotive average. Past it, Relay is stronger. Inside it, weaker.
Market
The Relay market on Amazon at a glance
Shoppers on Amazon United States searched for Relay 827K times last year and spent an estimated $452K. The top 5 brands take 92% of clicks. Flapen scores it 44 out of 100, a Fail.
01 · Demand
An estimated 4.0% of those searches ended in a purchase.
Shoppers searched for this 827K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 4.0% of those searches ended in a purchase. Searches in the last 90 days moved -13.9% against the 90 days before. Searches, conversion and average price together put the market at an estimated $452K a year.
- Searches, last 12 months
- 827K
- Growth, 90 days vs prior 90
- -13.9%
- Conversion, latest week
- 4.0%
- Market size, estimated
- $452Ka year
- Peak month
- September1.3× the quietest month
- Top search term
- relay345K searches a year
02 · Price
A sale here is worth $13.71.
Listings sell for $13.71 on average, from $5.92 to $29.41. Amazon reports units sold in ranges. This niche sold 25K to 30K a year. The average listing sells 1,000 to 1,250 of them. At $13.71 that is $14K to $17K a year per listing.
- Average price
- $13.71under the $15 to $100 sweet spot
- Price range
- $5.92–$29.41
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 25K–30K
- Units per listing a year
- 1,000–1,250
- Revenue per listing a year
- $14K–$17K
- Returns
- 1.8%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is ads.
100% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 0.9% of listings are out of stock. The average listing ranks #10 within Switches & Relays. It carries 1,005 reviews at 4.60 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 100%
- Prime listings
- 100%
- Out of stock, average day
- 0.9%
- Average rank
- #10in Switches & Relays
- Average rating
- 4.60 starsAmazon United States average 4.42 stars
- Average reviews
- 1,005per listing
- Listings tracked
- 23
04 · Newcomers
Brands here are settling in.
The brands on the shelf have sold for 57 months on average, so the names here are settling in.
- Launched, last 12 months
- 0
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 57 months
Products
Top Relay products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 11, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
irhapsody 5 Pack 40/30 AMP 12V DC Waterproof Relay Kit with Heavy-Duty Pigtail 5-PIN SPDT Automotive Relay
- Price
- $25.55
- Rating
- 4.7/5
- Reviews
- 3,540
- Age
- 8y ago

Gebildet 2pcs 12V 40A 4 Pin SPST Car Relay Harness JD1912 12AWG Harness Sockets with Built-in Diode for Automotive Truck Van Boat Motorcycle
- Price
- $8.04
- Rating
- 4.7/5
- Reviews
- 2,361
- Age
- 8y ago

Nilight 50003R Automotive Set 5-Pin 30/40A 12V SPDT with Interlocking Relay Socket and Wiring Harness-5 Pack 2 Years Warranty
- Price
- $12.53
- Rating
- 4.6/5
- Reviews
- 3,431
- Age
- 8y ago

irhapsody 4-pin 40/30AMP 12V DC Waterproof Relay with Heavy Duty Wires SPST Automotive Relay Pack of 1
- Price
- $10.03
- Rating
- 4.7/5
- Reviews
- 983
- Age
- 5y ago

4 PCS Relays 5 Pin Relay 40A Waterproof Car Relays 12V Relay Switch for Electric Cooling Fans Motor Starters Automotive Taillights
- Price
- $8.52
- Rating
- 4.3/5
- Reviews
- 302
- Age
- 1y ago
Trending
estimated 90-day click momentum
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
- Price
- $6.76
- Rating
- 4.8/5
- Reviews
- 132
- Age
- 2y ago

AEDIKO 10pcs DC 5V Relay Module - 1 Channel Relay Switch Board with Optocoupler Isolation High or Low Level Trigger
- Price
- $12.11
- Rating
- 4.4/5
- Reviews
- 42
- Age
- 3y ago

irhapsody 12vdc 30amp 4-pin Spst Multi-Purpose Starter Relay Automotive Replacement Relays
- Price
- $12.76
- Rating
- 4.6/5
- Reviews
- 376
- Age
- 2y ago

AEDIKO 4pcs DC 5V Relay Module - 1 Channel Relay Switch Board with Optocoupler Isolation High or Low Level Trigger
- Price
- $7.07
- Rating
- 4.5/5
- Reviews
- 209
- Age
- 5y ago

irhapsody 12v 30A 5-pin Spdt Multi-Purpose Starter Relay
- Price
- $12.80
- Rating
- 4.6/5
- Reviews
- 376
- Age
- 3y ago
Newest
by launch date
4 PCS Relays 5 Pin Relay 40A Waterproof Car Relays 12V Relay Switch for Electric Cooling Fans Motor Starters Automotive Taillights
- Price
- $8.52
- Rating
- 4.3/5
- Reviews
- 302
- Age
- 1y ago

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
- Price
- $6.76
- Rating
- 4.8/5
- Reviews
- 132
- Age
- 2y ago

Weasch 2 Pack JD1912 Car Relay 12V 40A 4 Pins SPST Automotive Switches and Starters Waterproof Relay for Boat Tractor Truck Motorcycle (2)
- Price
- $5.96
- Rating
- 4.7/5
- Reviews
- 207
- Age
- 2y ago

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
- Price
- $25.82
- Rating
- 4.5/5
- Reviews
- 505
- Age
- 2y ago

irhapsody 12vdc 30amp 4-pin Spst Multi-Purpose Starter Relay Automotive Replacement Relays
- Price
- $12.76
- Rating
- 4.6/5
- Reviews
- 376
- Age
- 2y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 63% of clicks. Leaders hold, but buyers still shop past them.
Brands
9 falling
Sellers
16
Est. top-5 brand share
92%
Top 20: 100%
Est. top-5 click share
63%
Top 20: 97%
Open market
5%
- iRhapsody36%
- Nilight21%
- Gebildet19%
- AEDIKO9%
- ecocstm7%
- Weasch3%
- Open — no brand owns it (3 brands, 5%)
Demand
Relay search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.3×
Search terms
Top Relay search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- relay345K/yr
- relays165K/yr
- 12v relay72K/yr
- relay 12v39K/yr
- rele24K/yr
- relay kit23K/yr
- automotive relay23K/yr
- 12 volt relay22K/yr
- 40 amp relay17K/yr
- relay switch25K/yr
Reviews and returns
What reviews say buyers love and hate about Relay
We read the reviews and the return reasons for every product selling here.
“not as good as you might think from the description”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
18 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Relay questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









