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5 Pack - EPAuto 30/40 AMP Relay Harness Spdt 12V, 5-PIN SPDT Bosch Style

4.7 4.7 out of 5 stars 6,674 ratings

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5 Pack

Purchase options and add-ons

Contact Type Spdt
Current Rating 40 Amps
Brand EPAuto
Wattage 560 watts
Coil Voltage 12 Volts

About this item

  • 40A/30A high switching capability.
  • Heavy-duty impact molded relay socket with 5 WIRES。White (common), Black (normally closed), and Yellow (normally open).
  • Package Include: 5 relays + 5 relay sockets with wires.
  • Safety UL Flame retardant 9" wires for the main contact.
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This product has fewer returns than average compared to similar products.

Frequently bought together

$15.87 ($3.17/Item)
Get it as soon as Monday, Apr 1
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Sold by EPFamily Direct and ships from Amazon Fulfillment.
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$8.99 ($0.90/Count)
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Ships from and sold by Amazon.com.
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$9.99 ($2.50/Count)
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5 Pack - EPAuto 30/40 AMP Relay Harness Spdt 12V, 5-PIN SPDT Bosch Style
5 Pack - EPAuto 30/40 AMP Relay Harness Spdt 12V, 5-PIN SPDT Bosch Style
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Price-7% $15.87
List:$16.99
$7.95$17.99$25.99-27% $10.19
List:$13.99
$8.99
Delivery
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Customer Ratings
Easy to install
4.8
4.6
5.0
4.7
4.4
4.7
Value for money
4.7
4.6
4.2
4.6
4.3
4.5
Water resistance
4.3
4.6
4.1
4.4
Longevity
4.7
4.4
4.0
Sold By
EPFamily Direct
Gebildet
IRHAPSODY® Store
IRHAPSODY® Store
Amazon.com
Ehdis
contact type
Spdt
Spst
Normally Closed
Spdt
Normally Closed, Normally Open
Spst
max switch current
30 amps
40 amps
80 amps
40 amps
30 amps
40 amps
coil voltage
12 volts
12 volts
12 volts
12 volts
12 volts
12 volts
wattage
560 watts
1.8 watts
1.8 watts
1.8 watts
1.8 watts

Product Description

Contact Capacity:

Normal switching Capacity (res.load):
- NO 40A 14VDC
- NC 30A 14VDC
Max. switching current: 40A
Max. switching voltage: 30VDC
Max. switching power: 560W

Characteristic Data:

Initial contact resistance (at 6VDC 1A): 50mΩ Max.
Operate time (at nominal volt.): 10 msec. Max.
Release time (at nominal volt.): 5 msec Max.
Initial insulation resistance: 100MΩ Min. (DC500V)
Initial dielectric strength:
- Between open contacts: AC500V, 50/60 Hz 1Min.
- Between coil and contact: AC500V, 50/60 Hz 1Min.
Vibration resistance:
- Functional: 10 ~ 55Hz at double amplitude of 1.5 mm
- Destructive: 10 ~ 55Hz at double amplitude of 1.5 mm
Shock resistance:
- Functional: 20G Min.
- Destructive: 100G Min.
Endurance (operations):
- Mechanical (at 7,200 ops./h): 10,000,000
- Electrical (at 600 ops./h): 100,000
Ambient Temperature: -40°C ~ +125°C (no condensation)

Product information

Technical Details

Additional Information

Warranty & Support

Product Warranty: For warranty information about this product, please click here

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5 Pack - EPAuto 30/40 AMP Relay Harness Spdt 12V, 5-PIN SPDT Bosch Style


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Customer reviews

4.7 out of 5 stars
4.7 out of 5
6,674 global ratings

Customers say

Customers like the quality, performance, value, and ease of use of the relay. For example, they mention it's well constructed, works well, and is great value for money. Some appreciate the simple instructions and the pre-wired plugs that make the installation very easy. That said, opinions are mixed on the wire size.

AI-generated from the text of customer reviews

613 customers mention576 positive37 negative

Customers are satisfied with the quality of the relay. They say that it is well-constructed, reliable, sturdy, and capable. They also appreciate the high-quality plastic used and the thick coating of the wires. Overall, customers recommend this product for its high quality and perfect for their projects.

"...for several years now and only had one failure so the relays themselves are pretty good, specially for the price. Just remember the included..." Read more

"The relays themselves are well made and function as designed...." Read more

"Well packaged, quality product, as described." Read more

"Good relay, but the harness/plug is not rated for 30/40 amps." Read more

529 customers mention520 positive9 negative

Customers are satisfied with the performance of the relay. They say that it works well, does as it should, and is great for automotive applications. Some customers also say that the relays are great for center stop light projects and that they have no issues with RF power through them. Overall, customers are happy with their purchase and recommend it to others.

"Had to wire up some lights on a truck, the relays worked good, were priced right, and arrived fast!" Read more

"The relays themselves are well made and function as designed...." Read more

"I am running up to 600 watts RF power through these with no issues at all...." Read more

"...It is very low current, and works great. We haven't had another "accidentally left the lights on" incident since...." Read more

426 customers mention426 positive0 negative

Customers appreciate the value of the relay. They say it's a great product for the price, and a convenient package deal.

"Had to wire up some lights on a truck, the relays worked good, were priced right, and arrived fast!" Read more

"...Perfect inexpensive solution." Read more

"Great price." Read more

"good relay for the money" Read more

167 customers mention167 positive0 negative

Customers are satisfied with the service provided by the company. They mention that the relays are well packaged, and arrived quickly. Some say that the product works fast and flawlessly.

"...lights on a truck, the relays worked good, were priced right, and arrived fast!" Read more

"Well packaged, quality product, as described." Read more

"...devices, but they appear to be hardy and good quality, and shipping was quick and easy. Heavy duty wire leads; perhaps 14 gauge. Pre-stripped ends...." Read more

"...This product comes with both Harness and relays. Relays are well packaged in a cardboard box. Inside is a foam pad and box has a closable lid...." Read more

150 customers mention134 positive16 negative

Customers find the relays easy to use. They mention that the prewired plugs make the install very easy, and the work is simple. The color-coded instructions are a convenient addition, and using these relays makes remote switching much easier.

"...And, after the modification, the job is simple--remove the cover to the fuse box on the driver's side near the firewall, unplug the old relays and..." Read more

"...The wiring harness that comes with them is a convenient addition. This beats using a few spade connectors, then a bunch of compound tape." Read more

"...trucks and I really like these because they are well marked with clear instructions on what wire goes where...." Read more

"...Makes it easy for any installation. The relays do work as they should within their specs...." Read more

146 customers mention112 positive34 negative

Customers find the wiring diagram sent with the relays clear and easy to follow. They also mention that the harnesses snap together for ease of mounting and organization. Customers say the wire connector makes it very easy to install and the socket and wiring harness make connections very easy. Overall, customers are satisfied with the ease of wiring and recommend the product to others.

"...for a continuous 30 or more amp load. Luckily the terminals are easy to remove from the connector so heavier wire can be installed and still..." Read more

"...The documentation is well about average with good graphics explaining the wiring scheme. My only issue was with the harnesses...." Read more

"...The wiring connectors lock together and make it very easy to mount multiple relays in one location. You can't beat these for the $...." Read more

"...used and the removed and returned so when I got it the wires where extremely short on only one relay the rest where completely fine !..." Read more

45 customers mention45 positive0 negative

Customers like the connector. They say the included sockets with wires are very nice and will make the installation. Customers also say the connectors are a bonus, just splice in your wire and you are good to go. They mention the relay comes with a socket and wiring harness to make connections very easy.

"Leads on the connector are sufficient gauge for rated current. Standard pin numbering nomenclature...." Read more

"...These come with detachable plugs so you can use the plug and wire set or if you are lucky and have a plug already set up the same way then just plug..." Read more

"I like the prewired plugs, they make the install very easy...." Read more

"Relays are good quality, work well, came with the wiring connector and pigtails too...." Read more

78 customers mention40 positive38 negative

Customers are mixed about the wire size of the relay. Some mention that the wires are of decent size to handle 30 amps, and the appropriate length for what they needed to do. However, others say that the size is a little small, using undersized wires is causing a fire risk. Some customers also mention that most of the wire pigtails are either not inserted very well, or the tabs were flattened out.

"...The new relays fit perfectly and I now have a few extra pigtail harnesses so I can relay-trigger the pod lights I've installed at the corners." Read more

"...Most of the wire pigtails are either not inserted very well, or the tabs were flattened out...." Read more

"...A neat and compact packaging box and very fast shipping. I would reccomend this as great value and superior product." Read more

"The wire for the actual contact is way undersized for the relays supposed 30/40 amp rating...." Read more

Relays with quality harnesses and removable mounting clips
5 Stars
Relays with quality harnesses and removable mounting clips
Standard automotive relays. Harnesses can connect together if you have several relays in one area (it will look neat).Photos show what amperage it the relay requires to operate at different voltagesMinimal voltage to active coil is 7.6 voltsLowest voltage to keep relay active is 2.4 voltsI've encountered poor quality 30/40 amp relays in the past that had a cheap micro relay inside. These are glued shut, but they are heavy for this type of relay, so they appear to have a good coil inside.Last 2 photos show this relay (right) next to a 80 amp relay (left). It is the size of a standard automotive relay.
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Top reviews from the United States

Reviewed in the United States on January 21, 2024
Size: 5 PackVerified Purchase
Reviewed in the United States on February 11, 2024
Size: 4 PackVerified Purchase
Customer image
5.0 out of 5 stars Relays with quality harnesses and removable mounting clips
Reviewed in the United States on February 11, 2024
Standard automotive relays. Harnesses can connect together if you have several relays in one area (it will look neat).

Photos show what amperage it the relay requires to operate at different voltages

Minimal voltage to active coil is 7.6 volts
Lowest voltage to keep relay active is 2.4 volts

I've encountered poor quality 30/40 amp relays in the past that had a cheap micro relay inside. These are glued shut, but they are heavy for this type of relay, so they appear to have a good coil inside.

Last 2 photos show this relay (right) next to a 80 amp relay (left). It is the size of a standard automotive relay.
Images in this review
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Reviewed in the United States on July 5, 2019
Size: 4 PackVerified Purchase
4 people found this helpful
Report
Reviewed in the United States on May 15, 2019
Size: 5 PackVerified Purchase
Reviewed in the United States on November 5, 2023
Size: 5 PackVerified Purchase
Customer image
5.0 out of 5 stars Used these to make a Remote Antenna Switch
Reviewed in the United States on November 5, 2023
I am running up to 600 watts RF power through these with no issues at all. Compared the SWR/Power and impedance readings to the Ameritron RCS-8V that I replaced with a board made out of these and they are basically identical. Perfect inexpensive solution.
Images in this review
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Customer imageCustomer image
Reviewed in the United States on December 22, 2023
Size: 4 PackVerified Purchase
Reviewed in the United States on November 22, 2016
Size: 5 PackVerified Purchase
6 people found this helpful
Report
Reviewed in the United States on December 13, 2023
Size: 5 PackVerified Purchase