We consider a 12 volt heavy duty relay to be a worthy investment in the long run. We are here to help you pick the best one for your purposes from all the best available products in market today.

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Our Top Picks:

Best Overall: Buy: Irhapsody 12 Volt Heavy Duty Relay READ REVIEW

Best For Waterproof Relay: Buy: Irhapsody Waterproof Relay READ REVIEW

Best For Life Expectancy: Buy: Ehdis 12 Volt Heavy Duty Relay READ REVIEW

Best For Great Price: Buy: Online Led 12 Volt Heavy Duty Relay READ REVIEW

Best For Customer Service: Buy: Online Led Standard Relay READ REVIEW

Best For Hundreds Of Uses: Buy: Winjun 12 Volt Heavy Duty Relay READ REVIEW

Best For Easy Installation: Buy: Vanjing 12 Volt Heavy Duty Relay READ REVIEW

Best For Wide Application: Buy: Walfront 12 Volt Heavy Duty Relay READ REVIEW

Best For High Power: Buy: Ehdis 12 Volt Heavy Duty Relay READ REVIEW

Best Overall: Irhapsody 12 Volt Heavy Duty Relay

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The best part: Irhapsody 12 Volt Heavy Duty Relay costs reasonable and it is available to ship in 24 hours. The irhapsody 12 volt heavy duty relay is strong, comes with strong mounting points and it is made with quality wiring harnesses. Easy to install. Just make sure you follow the wiring diagram. The 5 terminals of the relay have been sealed, which will bring more stable performance.

The relay has an operating tice and it switches current.s. And, it comes with excellent waterproof, provides effective protection and it is good for life expectancy. Most importantly, the irhapsody 12 volt heavy duty relay has both normally open and normally closed terminals, Terminal 87a is powered when the relay is inactive and switches the power to terminal 87 when the relay is activated.

Almost all customers quickly discovered that the relay can be used in daily auto fan installation and on boat project. Also, they also found that the relay is used to make an $8 starter relay for a kubota tractor rather than buying a pre-made unit for $22. And, they strongly agree that these are a standard bosch 5 pin relay. Overall, for almost all buyers, it was just what they wanted.

• The wires are color coded and correspond with the assigned numbers for a relay.
• 12 awg tinned copper wires for pin 30, pin 87, pin 87a. Length: 5.1in.
• Did a 5 x 12 v dc waterproof relay and harness.
• This is best for nice weather seals, it is durable and has a mounting style.

Best For Waterproof Relay: Irhapsody Waterproof Relay

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The best part: Irhapsody Waterproof Relay costs comparatively little and it is available to ship in 24 hours. The irhapsody waterproof relays have a good sealing feature and are very robust. The Manufacturer says: We attach great importance to the support you get before and after sales, so as to establish a long-term cooperative relationship. The 5 terminals of the relay have been sealed, which will bring more stable performance.

The relay is black and it worked perfectly. Further, the relay allows for easy install and it is white. Most importantly, the irhapsody waterproof relay has operating tice, It is perfect for high quality and has a spdt design.

Most customers found that the relay is not rated for 110v ac. Moreover, a few strongly agree that the relay is where a wiring diagram would have been nice. And, a few say that this is a universal 12v relay. You will need to wire to it whatever you want to operate. With no doubts, this relay passed the test and had very satisfied buyers eager to share their experience.

• Excellent waterproof and dustproof ability, high quality in any weather conditions.
• This is easy to install and it is great for high quality switch.
• You do need to know a little about electrical.
• This relay is built well and looks like it will last a long time.

Best For Life Expectancy: Ehdis 12 Volt Heavy Duty Relay

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We would, of course, be remiss if we didn't mention Ehdis 12 Volt Heavy Duty Relay for daily use. The ehdis 12 volt heavy duty relay switches current, is good for country of origin and it is great for temperature range. Make sure this fits by entering your model number. These are heavy duty 80a relays.

The relay is designed for high - value relays and it is good for life expectancy. Further, the relay can be used to install electric cooling fans, electric fuel pumps, electric water pumps, shaved door handles solenoids, trunk solenoids, horns. Finally, the ehdis 12 volt heavy duty relay is brand new, is made with heavy wires and it is mechanical.

Almost all buyers found that the relay comes with a socket, You need butt connectors to connect the pigtails. And, they also found that the relay is good for incab only ( it is not waterproof) If you want to use the outside side of your vehicle, then go for the waterproof relay only. Moreover, a few also found that the schematic on the relay is incorrect, circuits 87 and 87a should be switched, other wise the current will flow when not energized when using 87a. To sum up, at the price, they believe that they got a steal of a deal with it.

• It is sturdy and it is reliable.
• Mechanical life of 100,000+ cycles, life expectancy mechanical: 10,000,000 operations.
• Brand new heavy duty 12v SPDT relays and socket kit sets.
• 12 volt 80 amp 5-prong relay socket with 5 wires.

Best For Great Price: Online Led 12 Volt Heavy Duty Relay

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If you often find yourself confused about the appropriate and satisfactory relay, Online Led 12 Volt Heavy Duty Relay should be your first option for buying. The online led 12 volt heavy duty relay worked perfectly and it is functional. Make sure this fits by entering your model number. This 4 pin relay has a high current carrying capacity of 200 amperage of load at 14 volts dc, making it the perfect component to be used in a split charging setup.

Most importantly, the online led 12 voltheavy duty relay is perfect for split charging or various automotive applications.

Most buyers found that the relay makes no sense as the cap is in parallel with the contactor coil and will discharge much faster than that. Moreover, a few also found that the relay is great value for a 200 amp 12vdc relay. Also, a few say that the relay works well, good value but tight and small connection points. In short, for most buyers, it was what they were looking for.

• This is suitable for high power and it is great for nice heavy duty.
• This is rated current and it makes for nice quality.
• This is used to apply power to a snow blower connection on a UTV.
• This can be used in both automotive and marine settings.

Best For Customer Service: Online Led Standard Relay

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Online Led line of relay come in a pretty wide variety of styles, so you can definitely find one that suits your individual preferences and needs. The Online Led Standard Relay allows for a great deal and it is white. Bosch style 5-pin SPDT (single pole double throw) relay. These 12v 5-pin relays are rated to handle 60a on normally closed pin 87a and 80a on normally open pin 87.

Above all, the online led standard relay is easy to group and mount several relays together.

Most customers opine that the relay makes it very convenient for mounting. And, a few say that the relay can actually handle the rated 60/80 amps. Moreover, a few strongly agree that the relay is perfect for tying led lights to headlights via weatherpak assemblies instead of taps. In short, many have used the relay for more than a few months without letup, and it shows no sign of giving up.

• This has 1/4 inch blades plus it is used to power an aux.
• It is sturdy, is black and it worked perfectly.
• It has a user manual available for download under product information details.
• This is strong, it is perfect for great quality and has a mounting style.

Best For Hundreds Of Uses: Winjun 12 Volt Heavy Duty Relay

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The features department is where Winjun 12 volt heavyduty relay truly manages to shine. The Winjun 12 Volt Heavy Duty Relay allows for better performance and it allows for more connection accessories. Compared to other relay, Winjun complete connection accessory makes sure that you can efficiently finish your work once you get the relay set. Further, this is perfect for split charging or various automotive applications.

Lastly, the winjun 12volt heavy dutyrelay works great and it is designed for a great price.

In short, many customers have used the Winjun 12 volt heavy duty relay for more than a few months without any issues, and it shows no sign of giving up.

• This is switching current and it is great for high quality.
• This is used for control, alarms, horn, headlights and more.
• A heavy duty relay can make your work safer and more efficient.

Best For Easy Installation: Vanjing 12 Volt Heavy Duty Relay

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Best part: Vanjing 12 Volt Heavy Duty Relay costs comparatively low and it is available to ship in 24 hours. The vanjing 12 volt heavy duty relay comes with waterproof construction, It is durable and has a mounting style. For your and others' safety, let professional technicians install the equipment. Moreover, the relay is present on the relay for ease of installation.

Most importantly, the vanjing 12 voltheavy dutyrelay is black, it is white and has a SPDT design.

"These are very nice relay and waterproof connection harness that come with the metal hanger clip also. " - says, one customer. Without any doubt, this relay passed the test and had very satisfied buyers eager to share their experience.

• 2.wiring specifications: black-pin 86(16 awg), white-pin 85(16awg), red-pin 87a(14awg), blue-pin 30(14awg), yellow-pin 87(14awg).
• If you have any questions about the item, please express your points.
• Manufacturer says: we will reply to you for any reason and life-time technical support.
• This has good performance of waterproof, dustproof and moistureproof.

Best For Wide Application: Walfront 12 Volt Heavy Duty Relay

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The best part: Walfront 12 Volt Heavy Duty Relay costs comparatively low and it is available to ship in 24 hours. The walfront 12volt heavyduty relay is characterized by high relliability and durability. Make sure this fits by entering your model number. This car start relay is a good automotive replacement with wide applications, used for small cranes, wheat combine harvester, auto start power switch, auto preheat relay and more.

The relay is rated current and it is perfect for high quality. Above all, the walfront 12 volt heavy duty relay is designed for high reliability and it makes for easy installation.

• Good brand reputation.
• Delivers what they promise.

Best For High Power: Ehdis 12 Volt Heavy Duty Relay

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Next on the list, we've got yet another relay that manages to win our hearts. It's the Ehdis 12 Volt Heavy Duty Relay and it's widely considered as the relay that has the most suitable features. The ehdis 12 volt heavy duty relay is ideal for universal 12v applications. Able to handle those high current applications with ease, heavy duty make or break (on/off) relay. In addition, it is easy to install and it is good for life expectancy.

Above all, the ehdis 12 volt heavy duty relay is mechanical and it is durable.

Overall, most buyers call the relay functionally comfort, and no one questions it.

• Durable & firm & stable contact load: high power ideal for universal 12v applications.
• This is black and it works well for high power.
• This switches current and it is suitable for temperature range.
• This comes with a 2pin footprint + 2 terminal accessories, hundreds of uses, including.