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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 6,728 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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WARNING: California’s Proposition 65

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

UPC

‎707129801449

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 6,728 ratings

4.7 out of 5 stars

Best Sellers Rank

#8,766 in Automotive (See Top 100 in Automotive)
#7 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 TRUE MODS 1 Pack 5-Pin 12V Bosch Style Waterproof Relay Kit [Harness Socket] [12 AWG Hot Wires] [SPDT] [30/40 Amp] 12 Volt Automotive Marine Relays for Boats Auto Fan Cars	dummy Gebildet JD1912 Car Relay Harness 12V 40A 4 Pin SPST 12AWG Harness Sockets with Color-labeled Wires for Automotive Truck Van Motorcycle Boat (Pack of 2)	dummy 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
	Try again! Details Added to Cart spCSRF_Control	Try again! Details Added to Cart spCSRF_Control	Try again! Details Added to Cart spCSRF_Control	Try again! Details Added to Cart spCSRF_Control	Try again! Details Added to Cart spCSRF_Control	Try again! Details Added to Cart spCSRF_Control
Price	$11.97	-17% $9.50 List: $11.50	$7.95	$24.99	$17.99	$25.99
Delivery	Get it as soon as Saturday, Jul 13	Get it as soon as Saturday, Jul 13	Get it as soon as Saturday, Jul 13	Get it as soon as Saturday, Jul 13	Get it as soon as Saturday, Jul 13	Get it as soon as Saturday, Jul 13
Customer Ratings	4.76,728	4.61,356	4.72,993	4.71,001	4.7518	4.73,099
Easy to install	4.8	4.7	4.6	4.8	5.0	4.7
Value for money	4.8	4.6	4.6	4.5	4.2	4.5
Water resistance	—	4.6	4.3	—	—	4.6
Sold By	EPFamily Direct	OnlineLEDStore	Gebildet	IRHAPSODY® Store	IRHAPSODY® Store	IRHAPSODY® Store
contact type	Spdt	Normally Closed	Spst	Spst	Normally Closed	Spdt
max switch current	40 amps	40 amps	40 amps	40 amps	80 amps	40 amps
	—	—	—	—	—	15.6 volts
	—	—	8 volts	6 volts of direct current	—	—
	—	—	—	—	—	—
coil voltage	12 volts	12 volts	12 volts	12 volts	12 volts	12 volts
operation mode	Automatic	Auto,Manual	Manual	Automatic	Automatic	—
wattage	560 watts	—	1.8 watts	1.8 watts	1.8 watts	—

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Customer reviews

4.7 out of 5

6,728 global ratings

How customer reviews and ratings work

Customers say

Customers like the connectors, wire harness, and ease of wiring. They say it comes with a clear and concise wiring diagram that is easy to follow. Customers also appreciate the value for money. They are happy with service, quality, and easy of use. However, some customers have mixed opinions on wire size.

AI-generated from the text of customer reviews

Select to learn more

Quality Value Service Ease of use Ease of wiring Connector Wire harness Wire size

1,019 customers mention "Quality"979 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 and are standard quality. Overall, most are happy with their purchase and recommend it to others.

"...the harness pigtail, they were relatively inexpensive, and the reviews were good...." Read more

"Good quality and includes pigtail connectors. Work great!" 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

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

427 customers mention "Value"427 positive0 negative

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

"...these because they came with the harness pigtail, they were relatively inexpensive, and the reviews were good...." Read more

"Good value, includes sockets that lock together for specific circuits - that was a bonus!..." Read more

"Had to wire up some 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

168 customers mention "Service"168 positive0 negative

Customers are satisfied with the service. They mention that the relays are packaged well and arrived super fast.

"...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

154 customers mention "Ease of use"138 positive16 negative

Customers find the relays easy to use. They say the instructions are simple and the prewired plugs make installation very easy. They also say the diagram is easy to understand and the color-coded instructions are a convenient addition. Customers also mention that using these relays makes remote switching much easier.

"...It's easy to move the terminals to match your desired configuration using a jeweler's screwdriver...." Read more

"...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

"...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

143 customers mention "Ease of wiring"110 positive33 negative

Customers find the wiring diagram clear and easy to follow. They also say the harnesses snap together for ease of mounting and organization. Customers also mention that the instructions are explicit with wire colors and terminal names.

"...The included wiring is a nice bonus, but it is NOT sealed so water can still get into the connections...." 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

73 customers mention "Connector"73 positive0 negative

Customers like the connector. They say it's a bonus, it includes pigtail connectors, and extended cables. Customers also mention that the relays come with wired sockets that lock together.

"Good quality and includes pigtail connectors. Work great!" Read more

"Good value, includes sockets that lock together for specific circuits - that was a bonus!..." Read more

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

33 customers mention "Wire harness"33 positive0 negative

Customers appreciate that the relay comes with a wire harness. They say that it's a nice touch and makes installation a breeze.

"...I selected these because they came with the harness pigtail, they were relatively inexpensive, and the reviews were good...." Read more

"This product is well made. This product comes with both Harness and relays. Relays are well packaged in a cardboard box...." Read more

"Great relays, came with everything needed. They work fast and flawless. The pigtails are decent length, how’s ever kind of thin...." Read more

"...The relays also have moulded slots so they can be attached to each other for close quarter and secure attachment to each other...." Read more

85 customers mention "Wire size"46 positive39 negative

Customers are mixed about the wire size. Some mention that the wires are of decent size to handle 30 amps, and the pigtails are an appropriate length. However, others say that the size is a little small, using undersized wires is causing a fire risk, and that the pts are not inserted very well.

"...In addition, these relays are a good width so they can plug in to the linked sockets without interference...." Read more

"...While installing i noticed the wire gauge size was 16. The description and relay state 30/40 Amp. Do not install this and run a 30 Amp circuit...." Read more

"...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

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Zero Signal

Nice to have around for non-critical applications

Reviewed in the United States on May 13, 2024

Size: 4 PackVerified Purchase

I bought this set of relays so I could use one to run an electric fuel pump on my lawn tractor. The factory diaphragm fuel pump is tired and I didn't want to mess with it, so I bodged an electric pump with a relay to turn it on.

I selected these because they came with the harness pigtail, they were relatively inexpensive, and the reviews were good. Those are my criteria when I buy non-critical parts to keep around. I don't want to spend the money on name-brand relays for non-critical applications such as this because an inexpensive relay will do the job just fine, and even if it doesn't, my lawn tractor is never more than 200 feet from my house.

Would I use this relay on a critical system in my car, IE fuel pump? Only if I was in a real bind, and in that case I'd throw as many spares as I could find in the glovebox. Not saying these relays won't work (the one I installed is working quite well), but I have no idea what this company's QC is like or how good they will be in the long run.

I suspect that most people who buy these will use them for non-critical applications-- accessories or lights on their car, adding a circuit, etc. For this they'll probably be fine, and if they're not, they'll be easy enough to swap out for something better. As for me, I'm glad I have them for little project like my lawn tractor. If I manage to use them all, I'll buy more.

Helpful

Danny Owens

Good quality relays

Reviewed in the United States on May 9, 2024

Size: 5 PackVerified Purchase

Good quality and includes pigtail connectors. Work great!

Helpful

Mrhubada

Does the job well.

Reviewed in the United States on May 6, 2024

Size: 5 PackVerified Purchase

Very useful in the 5 piece package.

Helpful

E.T.

Good value, includes sockets that lock together

Reviewed in the United States on June 25, 2024

Size: 4 PackVerified Purchase

Good value, includes sockets that lock together for specific circuits - that was a bonus! It's easy to move the terminals to match your desired configuration using a jeweler's screwdriver. In addition, these relays are a good width so they can plug in to the linked sockets without interference.

My only gripe is admittedly minor - these relays have a metal tab inserted for mounting purposes (you can see it in the photo). I would have preferred the tabs be included separately so I could insert the ones I needed rather than having to fight to remove extra tabs.

The tab issue will not keep me from buying these the next time I need to create a custom circuit for one of my vehicles.

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

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

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

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

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