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East to use 30/40 AMP Relay with Harness 12V, 5-PINRobin's Testing Studio (expert island)

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EPAuto 30/40 AMP Relay Harness Spdt 12V Bosch Style - 4 Pack

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4.7 6,698 ratings

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Amazon's Choice in Automotive Replacement Starter Relays by EPAuto

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Purchase options and add-ons

Contact Type	Spdt
Current Rating	40 Amps
Brand	EPAuto
Operation Mode	Automatic
Wattage	560 watts

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: 4 relays + 4 relay sockets with wires.
Safety UL Listed 6" wires with pigtail leads for the main contact.

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EPAuto 30/40 AMP Relay Harness Spdt 12V Bosch Style - 4 Pack

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Nilight 10 Pack NI-FH01 Inline Holder 14AWG Wiring Harness ATC/ATO 30AMP Blade Automotive Fuse Holder-10, 2 Years Warranty

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irhapsody 5 Pack 40/30 AMP 12V DC Waterproof Relay and Harness - Heavy Duty 12 AWG Tinned Copper Wires, 5-PIN SPDT Automotive

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Top Brand: EPAuto

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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

Contact Type

‎Spdt

Current Rating

‎40 Amps

Brand

‎EPAuto

Operation Mode

‎Automatic

Wattage

‎560 watts

Coil Voltage

‎12 Volts

Contact Current Rating

‎40 Amps

Maximum Switching Current

‎40 Amps

Specification Met

‎UL

Upper Temperature Rating

‎125 Degrees Celsius

Manufacturer

‎EPAuto

Item Weight

‎10.2 ounces

Product Dimensions

‎5.75 x 1.75 x 4.75 inches

Item model number

‎AE-001-2

Is Discontinued By Manufacturer

‎No

Manufacturer Part Number

‎AE-001-2

Additional Information

ASIN

B072QXDZRD

Customer Reviews

4.7 6,698 ratings

4.7 out of 5 stars

Best Sellers Rank

#4,493 in Automotive (See Top 100 in Automotive)
#3 in Automotive Replacement Starter Relays

Date First Available

November 16, 2015

Warranty & Support

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

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	This Item EPAuto 30/40 AMP Relay Harness Spdt 12V Bosch Style - 4 Pack	Recommendations irhapsody 4-PIN 40/30AMP 12V DC Waterproof Relay with Harness - Heavy Duty 12 AWG Tinned Copper Wires, 5 Pack SPST Automotive Relay	dummy irhapsody 80/60Amp 12v 5-pin Relay Kit, spdt 12-Volt Bosch Style Automotive Relay with Heavy-Duty Pigtail, 6-Pack	dummy irhapsody 5 Pack 40/30 AMP 12V DC Waterproof Relay and Harness - Heavy Duty 12 AWG Tinned Copper Wires, 5-PIN SPDT Automotive Relay	dummy Nilight SPDT Relay Replacement 12V 5 Prong SPDT Auto Tilt Trim Relay (Pack of 10) 40/30 AMP Electrical Power Relay Switch 5 Pin Bosch Style Relay for Automotive Cars Marine Boats,2 Years Warranty	dummy Nilight 50023R 5 Pack 30A Fuse Relay car Truck Socket kit-30A Switch Harness Set-12V DC 4-Pin SPST Automotive 14 AWG Hot Wires-Auto Switches & Starters Set,2 Years Warranty
	Try again! Details Added to Cart	Try again! Details Added to Cart	Try again! Details Added to Cart	Try again! Details Added to Cart	Try again! Details Added to Cart	Try again! Details Added to Cart
Price	$11.97	$24.99	$17.99	$25.99	$14.02	$16.99
Delivery	Get it as soon as Tuesday, May 14	Get it as soon as Tuesday, May 14	Get it as soon as Tuesday, May 14	Get it as soon as Tuesday, May 14	Get it as soon as Tuesday, May 14	Get it as soon as Tuesday, May 14
Customer Ratings	4.76,698	4.6957	4.7500	4.73,027	4.41,055	4.51,738
Easy to install	4.8	4.7	5.0	4.7	4.4	4.5
Value for money	4.8	4.5	4.2	4.5	4.3	4.2
Water resistance	—	—	—	4.6	4.1	3.8
Sold By	EPFamily Direct	IRHAPSODY® Store	IRHAPSODY® Store	IRHAPSODY® Store	Amazon.com	Amazon.com
contact type	Spdt	Spst	Normally Closed	Spdt	Normally Closed, Normally Open	Spst
max switch current	40 amps	40 amps	80 amps	40 amps	30 amps	30 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	—

Looking for specific info?

Customer reviews

4.7 out of 5

6,698 global ratings

How customer reviews and ratings work

Customers say

Customers like the quality, connectivity, ease of wiring, and connectors of the relay. For example, they mention it works great, the wiring connectors lock together, and the harnesses connect together for ease of mounting and organization. That said, they appreciate the clear and easy to follow wiring diagram and the included sockets with wires. As for the service, they say it was fast and the product was packaged well.

AI-generated from the text of customer reviews

1,018 customers mention978 positive40 negative

Customers are satisfied with the quality of the relay. They mention that it works great, is excellent, and has no issues. Some say that the relays themselves are pretty good. Overall, most are happy with the product's quality and value.

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

"...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

"...Then a yellow one did. So far that's all. The relays themselves seem to be fine and all have the same resistance (quality) the plug tabs is my only..." Read more

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

427 customers mention427 positive0 negative

Customers appreciate the value of the relay. They mention that it's great 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

"Good price, quick ship, as advertised = recommend !" Read more

"Great price." Read more

168 customers mention168 positive0 negative

Customers are satisfied with the service. They mention that the relays are well packaged, and arrived quickly.

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

"Good price, quick ship, as advertised = recommend !" Read more

"Well packaged, quality product, as described." 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 instructions are simple, the prewired plugs make the install very easy, and the job is simple. They also appreciate the color-coded instructions and the convenient addition of the remote switch.

"...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

145 customers mention112 positive33 negative

Customers like the ease of wiring the relays. They mention that the wiring diagram is clear and easy to follow, the harnesses snap together for ease of mounting and organization, and the contacts are identified. They also say the wire connector makes it very easy to install and the relay chains slide together easily.

"...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 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

"...the supplied connectors are pretty easy to salvage and reuse with a small pick and a small flathead screwdriver if you're as stubborn and frugal as..." 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 relays come with the wiring connector, so if one fails, it is easy to replace. They also say the included sockets with wires are very nice and will make the install. Customers also mention that the connectors and extended cables are a bonus.

"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

42 customers mention38 positive4 negative

Customers like the connectivity of the relay. They say the wiring connectors lock together and make it easy to mount multiple relays in one. They also appreciate the interconnects to hold them together. Customers also mention that the harnesses make a solid connection to relay, are made with heavy gauge wire, and are securely attached to the plastic connector.

"...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

"Great multi-pack relays. Easy to use color coded wires and clear diagram on top of the relay...." Read more

"...I like that they all slide/clip together into a neat row. I wish the mount tabs were on the harness instead of the relay itself...." Read more

"...Each wiring harness is made with heavy gauge wire, securely attached to the plastic connector, and the enclosed instructions clearly indicate which..." Read more

78 customers mention40 positive38 negative

Customers have mixed opinions about the wire size of the relay. Some say the wires are of decent size to handle 30 amps, and the pigtails are an appropriate length. However, others say the size is a little small and using undersized wires is a fire risk.

"...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

"...The wires are 18 gauge, so I would not use for more than 15 amps. Always remember to put fuses in your wiring so you don't cause a fire...." 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

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kevin bostelman

Good quality!

Reviewed in the United States on January 21, 2024

Size: 5 PackVerified Purchase

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

Helpful

Matt

Relays with quality harnesses and removable mounting clips

Reviewed in the United States on February 11, 2024

Size: 4 PackVerified Purchase

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.

Helpful

James E. Hawkins

Work great for a variety of automotive things.

Reviewed in the United States on July 5, 2019

Size: 4 PackVerified Purchase

I have used these for everything from upgrading headlights to electric chokes and even as a starter relay on an 84 Chevy truck and had no issues.
The relays are sealed well so you don't have to worry about water intrusion in the relay itself. The included wiring is a nice bonus, but it is NOT sealed so water can still get into the connections. Also the wires that are included maybe on the small side for any sustained high current, certainly not suited 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 look professional.
The mounting bracket is a bit flimsy but holds the relay in place.

For the price you cant hardly go wrong, certainly much cheaper than buying them at a local parts store.

Update 10/5/23
Been using these for several years now and only had one failure so the relays themselves are pretty good, specially for the price.
Just remember the included wires are NOT up to the task of a 30 amp load, even if the relay is.
The wires are marked as 16awg which is OK for up to a 15 amp load, depending on the length of the wire used in the circuit and how much voltage drop is allowable.

Have successfully used for electric radiator cooling fans after replacing some of the wires in the relay connector.
Personally, I make new wires for the power supply side and the load side of the relay (terminals 30, 87 [& 87a if it is being used]) if the load is over 10 amps. Terminals 85 & 86 are fine since they are just used to activate the relay and that does not use much current at all.

As always, make sure any hot wires are fused with an appropriate sized fuse for the wires and circuit load as close to the battery as possible.

Relays are still 5 star, specially for the price.
The wiring and connector would be more like a 2 since it is so far below the rating of the relay, but again, for the price you can't expect much. At this price point, you are lucky to get a connector at all.

4 people found this helpful

Helpful

Giovanni

Interlocking plugs

Reviewed in the United States on July 16, 2023

Size: 4 PackVerified Purchase

These made my setup look so clean. Downside is inside the plug broke. The tab that holds the blue power wire broke. Then a yellow one did. So far that's all. The relays themselves seem to be fine and all have the same resistance (quality) the plug tabs is my only fear of breaking later down the road.

Helpful

Cecilia Ransom

Used these to make a Remote Antenna Switch

Reviewed in the United States on November 5, 2023

Size: 5 PackVerified Purchase

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.

Helpful

W. C. Greer

Quiet handy for little projects

Reviewed in the United States on November 22, 2016

Size: 5 PackVerified Purchase

Relays seem to be well built, reliable, sturdy, and capable.

Wiring harnesses also seem to be well built.

Just an FYI, even though the relay is rated for 30A, doesn't mean you should run 30 amps through it. As others have mentioned, the wiring harness included, is not rated for that high level of current.You should always factor in, 'the weakest link', i.e. if the wires feeding the relay will not handle more than say 8 amps (and I don't know what these wires will handle), it doesn't matter much how strong the relay is, you don't run more than 8 amps through the wires.... duh. and even that is pushing it. When an overall circuit is rated for 8 amps max, you should not get anywhere near 8 amps anyway. Pushing anything to the max is never a good idea. Besides, running high current through a mechanical relay, the contacts will arc, carbon will build up on the contacts, the contacts will become pitted, and eventually.... one day, when it energizes, the contacts will stick, and whatever it is will be 'On' continuously... if it comes on at all. You might want to consider using a solid state relay (DC) or a triac (AC) imho.

Any time you are dealing with any type of high current, get someone that has an electrical engineering degree or background to look at your circuit designs... just because you may know how-to, doesn't mean you know how to.

One of my kids kept leaving their car lights on, apparently they have a lot on their minds these days. I used this to build a simple 'lights-on' circuit. This particular car doesn't have one. I found a line that goes to 12 volts when the key is turned on, and found the "Lights" wire. I wired it up, so if the lights are on, and the key is off, a Piezo Electric buzzer sounds. It is very low current, and works great. We haven't had another "accidentally left the lights on" incident since.

These are quiet handy for any number of little projects you might have.

6 people found this helpful

Helpful

jimjeeper

Recommend

Reviewed in the United States on April 23, 2024

Size: 4 PackVerified Purchase

Good price, quick ship, as advertised = recommend !

Helpful

mjwoodoh1

As described, great product.

Reviewed in the United States on December 22, 2023

Size: 4 PackVerified Purchase

Great price.

Helpful

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