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Sold by: Switch Suspension
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(197 ratings)
86% positive over last 12 months
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Viair 93940 40 Amp Air Compressor Relay for 12 Volt compressor , Black

4.7 4.7 out of 5 stars 550 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Automotive Replacement Air Conditioning Compressor Relays by VIAIR

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1 Count (Pack of 1)

Purchase options and add-ons

Connector Type Quick Connect
Contact Material Silver Nickel
Current Rating 40 Amps
Mounting Type Chassis Mount
Brand VIAIR

About this item

  • 40 Amp 12v Relay with Mounting Tabs
  • Four 1/4 inch spade post connectors
  • Handles up to 40 amperes maximum ampere draw in applications
  • Each compressor must have its own relay for a proper installation
  • Mounting tab for relay molded into moisture resistance relay case

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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 6 x 6 x 5.5 inches; 0.8 ounces
  • Item model number ‏ : ‎ 93940
  • Date First Available ‏ : ‎ June 1, 2006
  • Manufacturer ‏ : ‎ VIAIR
  • ASIN ‏ : ‎ B000YC7GBU
  • Country of Origin ‏ : ‎ China
  • Customer Reviews:
    4.7 4.7 out of 5 stars 550 ratings

Product Description

Viair 40 ampere four-post relay for all 12-volt applications.

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Top Brand: VIAIR

Highly Rated
4.6/5 star rating from 10K+ customer ratings
Trending
10K+ orders for this brand in past 3 months
Low Returns
Customers usually keep items from this brand

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Customer reviews

4.7 out of 5 stars
4.7 out of 5
550 global ratings

Customers say

Customers like the performance, quality, value, and delivery of the relay. They mention that it works well, is dependable, and is well made. They also appreciate the fast shipping.

AI-generated from the text of customer reviews

22 customers mention22 positive0 negative

Customers are satisfied with the performance of the relay. They mention that it works well, is heavy duty, and has no issues. Some customers also say that it solved their problem immediately and shows no signs of failing.

"...Popped this one in and it works good as new again." Read more

"...Fit perfectly and my compressor works perfectly now" Read more

"I have 2 and they work flawlessly" Read more

"Works great" Read more

18 customers mention16 positive2 negative

Customers like the quality of the relay. They mention that it is a high quality product, well made, and dependable. Some customers also say that the switches are durable and will last a long time with no issues. Overall, customers are satisfied with the quality and performance of the product.

"These are a great replacement relay for anyone with an air lift performance system...." Read more

"...Other than that looks like a high quality relay compared to the other ones I've got from EBay and such." Read more

"...I expect this to last a long time with no issues." Read more

"...Heavy duty and up to now no issues. I'm sure they will provide years of trouble free service." Read more

6 customers mention6 positive0 negative

Customers appreciate the value of the relay. They mention that the price is good and the shipping is fast.

"Great price. I have ran Viair compressors for a couple years without problems...." Read more

"Great price" Read more

"Great price, fast shipping" Read more

"Product was exactly as described and at a fair price. Thanks!" Read more

3 customers mention3 positive0 negative

Customers are satisfied with the delivery of the product. They appreciate the fast shipping.

"Great price, fast shipping" Read more

"Good price,fast shipping" Read more

"Fast shipping" Read more

3 customers mention3 positive0 negative

Customers are satisfied with the service provided by the company. They say that the product is of good quality and will provide years of trouble-free service.

"good service and product" Read more

"...Heavy duty and up to now no issues. I'm sure they will provide years of trouble free service." Read more

"Great service and products..." Read more

Working great
5 Stars
Working great
No problems so far. Wired in for use with air system in a pickup toolbox. Florida heat inside a metal box haven't killed them yet.
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Top reviews from the United States

Reviewed in the United States on January 11, 2024
Size: 1 Count (Pack of 1)Verified Purchase
Reviewed in the United States on January 26, 2023
Size: 1 Count (Pack of 1)Verified Purchase
2 people found this helpful
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Reviewed in the United States on December 21, 2023
Size: 1 Count (Pack of 1)Verified Purchase
Reviewed in the United States on January 14, 2016
Size: 1 Count (Pack of 1)Verified Purchase
One person found this helpful
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Reviewed in the United States on May 29, 2023
Size: 1 Count (Pack of 1)Verified Purchase
Reviewed in the United States on March 12, 2022
Size: 1 Count (Pack of 1)Verified Purchase
4 people found this helpful
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Reviewed in the United States on March 19, 2023
Size: 1 Count (Pack of 1)Verified Purchase
Reviewed in the United States on February 25, 2021
Size: 1 Count (Pack of 1)Verified Purchase

Top reviews from other countries

s w
5.0 out of 5 stars As described and good value for the price.
Reviewed in Canada on December 1, 2015
Size: 1 Count (Pack of 1)Verified Purchase
nick minnema
5.0 out of 5 stars These are perfect I'd order again
Reviewed in Canada on February 19, 2022
Size: 1 Count (Pack of 1)Verified Purchase
John
5.0 out of 5 stars Works good
Reviewed in Canada on October 6, 2017
Size: 1 Count (Pack of 1)Verified Purchase
Wreckerdan
5.0 out of 5 stars A+
Reviewed in Canada on December 21, 2018
Size: 1 Count (Pack of 1)Verified Purchase
GMF
4.0 out of 5 stars No issues
Reviewed in Canada on October 4, 2016
Size: 1 Count (Pack of 1)Verified Purchase