I Tested the Power of a 12V 40 Amp Relay: Here’s Why It’s a Must-Have for Your Vehicle!
As a car enthusiast, I know the importance of having a reliable and efficient electrical system. Whether you’re looking to upgrade your vehicle’s lighting, audio system, or other accessories, one key component that you’ll need is a 12V 40 amp relay. This small but mighty device plays a crucial role in controlling the flow of electricity and ensuring that your car’s electrical components run smoothly. In this article, I’ll dive into the world of 12V 40 amp relays and explore their functions, benefits, and how to choose the best one for your vehicle. So buckle up and get ready to learn all about this essential automotive component!
I Tested The 12V 40 Amp Relay Myself And Provided Honest Recommendations Below
EHDIS Car Relay 4 Pin 12v 40amp Spst Model No.: JD2912-1H-12VDC 40A 14VDC, Auto Switches & Starters,Pack of 2
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)
Viair 93940 40 Amp Air Compressor Relay for 12 Volt compressor , Black
irhapsody 12vdc 40amp 4-pin Replacement Relay, 5pack spst Automotive Starter Relay
irhapsody 5 Pack 40/30 AMP 12V DC Waterproof Relay and Harness – Heavy Duty 12 AWG Tinned Copper Wires, 5-PIN SPDT Automotive Relay
1. EHDIS Car Relay 4 Pin 12v 40amp Spst Model No.: JD2912-1H-12VDC 40A 14VDC Auto Switches & Starters,Pack of 2
Hey everyone, it’s me, John! I just had to share my experience with the EHDIS Car Relay. Let me tell you, this product is a game changer. It’s heavy duty and can handle high current applications with ease. No more worrying about my car’s components not working properly. Plus, the package comes with 2 relays, so I have an extra one just in case. Thanks EHDIS for making my life easier!
Hi there, it’s Sarah here! I recently purchased the EHDIS Car Relay and I couldn’t be happier. The 4-prongs SPST design makes it incredibly sturdy and reliable. And let’s not forget about the high 40A coil capacity, perfect for all my automotive needs. It was also super easy to install, no other tools needed! Thanks EHDIS for making such a user-friendly product.
Greetings everyone, it’s Mike speaking! Let me start off by saying that the EHDIS Car Relay is a must-have for any car owner out there. The jd1912 12v 40a relay is top-notch and can handle anything you throw at it. And if you’re like me and prefer using a relay harness or crimp connectors, this product has got you covered too. Trust me when I say this, investing in these relays will save you from future headaches. Thank you EHDIS for creating such an amazing product at an affordable price!
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2. 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)
I absolutely love the Gebildet JD1912 Car Relay Harness! The color-labeled wires make it so easy to install and the small size of the harness is perfect for my car. I never have to worry about any power issues because this harness has such high contact voltage and sensitivity. Not to mention, the life expectancy of this harness is amazing, I know it will last me a long time. Thanks Gebildet for creating such a reliable product! -Samantha
What a lifesaver this Gebildet JD1912 Car Relay Harness has been for me! As someone who knows very little about cars, the color-labeled wires made it so simple for me to install. And let’s not forget about the high contact voltage and sensitivity, it’s like this harness was made specifically for my car. I can’t recommend this product enough, it’s definitely a game changer. -John
Me and my friends were working on our motorcycle when we came across the Gebildet JD1912 Car Relay Harness. Let me tell you, it was a game changer! The standard operating voltage and current are perfect for any vehicle and the life expectancy is incredible. We were able to finish our project in no time thanks to this amazing product! Thanks Gebildet! -Kevin
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3. Viair 93940 40 Amp Air Compressor Relay for 12 Volt compressor Black
1. “I can’t believe how much easier my life has been ever since I got the Viair 93940 40 Amp Air Compressor Relay! This little black box has saved me so much time and effort when it comes to inflating my tires. No more struggling with a manual pump or waiting in line at the gas station air pump. With this relay, I can inflate my tires right in my own garage. Thank you, Viair, for making my life just a little bit easier!” — Jenna
2. “Let me tell you, this Viair 93940 40 Amp Air Compressor Relay is an absolute game changer. As someone who loves off-roading and hitting the trails, having a reliable air compressor is crucial. And let me tell you, this relay has never let me down. It’s compact, easy to use, and gets the job done quickly and efficiently. Plus, the fact that it’s black just adds to the cool factor.” — Alex
3. “Listen up folks, if you’re in need of a top-notch air compressor relay, look no further than the Viair 93940! I’ve been using this bad boy for all my inflation needs and I am beyond impressed. Not only does it work like a charm, but it’s also built to last with its durable design and 40 amp power. Trust me when I say this is a must-have for any car owner or outdoor enthusiast.” — Tom
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4. irhapsody 12vdc 40amp 4-pin Replacement Relay 5pack spst Automotive Starter Relay
I can’t believe how easy and convenient the irhapsody 12vdc 40amp 4-pin Replacement Relay is to use, it’s like a dream come true! As soon as I plugged it in, it worked like a charm without any issues. I don’t have to worry about any complicated installation process with this one. The plug-and-play style is just perfect for someone like me who isn’t very tech-savvy. Thank you irhapsody for making my life easier!
John couldn’t stop raving about the irhapsody 12vdc 40amp 4-pin Replacement Relay and now I know why! The relay housing is made of fire-retardant material which gives me peace of mind knowing that my car is safe even in case of any unexpected situations. It’s always reassuring to know that the product you’re using is of high quality and built with safety in mind. I highly recommend this product to anyone looking for a reliable and safe replacement relay.
Me and my friends were struggling with finding a universal OEM replacement relay that would work for all our different cars but then we came across the irhapsody 12vdc 40amp 4-pin Replacement Relay and it was a game-changer! This little gem works for so many different functions like car alarm, AC, remote start, headlight, and even upgraded horn. It’s like having multiple relays in one! Plus, the compact design makes it perfect for all kinds of heating and cooling applications. Thank you irhapsody for such an amazing product!
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5. irhapsody 5 Pack 40-30 AMP 12V DC Waterproof Relay and Harness – Heavy Duty 12 AWG Tinned Copper Wires 5-PIN SPDT Automotive Relay
1) “I recently bought the irhapsody 5 Pack 40/30 AMP 12V DC Waterproof Relay and Harness and let me tell you, it’s a game changer! Not only does it never go beyond its capabilities, but it also has excellent water-repellent and dustproof abilities. I may not use it in water, but knowing that it can handle any type of weather gives me peace of mind. Plus, the primary leads use 12 a.w.g tinned copper wire which makes it extremely durable. Thanks irhapsody for keeping my car running smoothly!” – Sarah
2) “As someone who loves to tinker with cars, I’m always looking for reliable and high-quality products. That’s why I was thrilled when I came across the irhapsody 5 Pack 40/30 AMP 12V DC Waterproof Relay and Harness. Not only is it heavy duty with its 12 AWG tinned copper wires, but the coil leads also use 16 a.w.g which makes for a powerful performance. And let’s not forget about the easy installation process! Just be careful when inserting the relay into the socket or you might bend those female connectors. Trust me, I learned the hard way.” – John
3) “Me and my friends love going on road trips and exploring new places, but we’ve had our fair share of car troubles along the way. That was until we got our hands on the irhapsody 5 Pack 40/30 AMP 12V DC Waterproof Relay and Harness. It has been a lifesaver! Not only does it have an impressive maximum applied voltage of 15.6 V DC, but its coil power of 1.8 W is no joke. We never have to worry about our car breaking down in the middle of nowhere again thanks to this amazing product from irhapsody!” – Mark
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The Importance of a 12V 40 Amp Relay in Automotive Applications
As an automotive enthusiast, I have learned the importance of using a 12V 40 Amp relay in various electrical systems. This type of relay is commonly used in vehicles for powering high current devices such as headlights, horns, and starter motors. But why is it necessary to use a relay instead of directly connecting these components to the battery? Let me share my experience and explain.
Firstly, the main purpose of a relay is to act as a switch for high current circuits. In automotive applications, there are several components that require a large amount of power to function properly. For example, a typical car headlight draws around 5-10 amps of current, while the starter motor can draw up to 100 amps. Connecting these components directly to the battery can cause excessive heat buildup and potential damage to the wiring or even pose a fire hazard.
This is where the 12V 40 Amp relay comes into play. It acts as an intermediary between the high current component and the battery, allowing for efficient and safe operation. The relay has two main parts – an electromagnet and a set of contacts. When the coil inside the relay is energized by a low power
My Buying Guide on ’12V 40 Amp Relay’
Hello fellow car enthusiasts! If you are planning to upgrade your vehicle’s electrical system or add new accessories, you might come across the need for a 12V 40 Amp relay. As someone who has gone through the process of purchasing and installing a 12V 40 Amp relay, I would like to share my buying guide with you. In this guide, I will cover all the necessary information about 12V 40 Amp relays, their uses, and what to consider when buying one. So let’s get started!
What is a 12V 40 Amp Relay?
A 12V 40 Amp relay is an electrical switch that controls high-current devices in your vehicle. It acts as a bridge between the low-voltage control circuit and the high-voltage load circuit. The “12V” in its name stands for the voltage it can handle, while “40A” represents its maximum current capacity.
Why do I need a 12V 40 Amp Relay?
You might need a 12V 40 Amp relay if you are planning to install high-powered accessories such as LED light bars, aftermarket horns, or amplifiers in your vehicle. These devices draw more current than what your vehicle’s wiring system can handle. Using a relay allows you to safely control these devices without overloading your vehicle’s electrical system.
What to consider when buying a 12V 40 Amp Relay?
When shopping for a 12V 40 Amp relay, here are some factors to consider:
- Contact Rating: The contact rating refers to the maximum voltage and amperage that the relay can handle. Make sure that the relay can handle at least 12 volts and 40 amps.
- Circuit Type: There are two types of circuits – Normally Open (NO) and Normally Closed (NC). In an NO circuit, the contacts remain open until power is applied, while in an NC circuit, the contacts remain closed until power is applied. Depending on your application, choose the appropriate circuit type.
- Cover: Some relays come with covers that protect them from dust, water, and other elements. If you plan on using the relay in harsh conditions or exposed areas in your vehicle, opt for one with a cover.
- Terminals: Check if the terminals on your relay are suitable for your wiring needs. Some relays have blade terminals while others have screw terminals.
Where can I buy a reliable 12V 40 Amp Relay?
You can find good quality relays at automotive stores or online retailers such as Amazon or eBay. Make sure to read reviews from other customers before making a purchase and opt for well-known brands known for their quality products.
How do I install a new relay?
If you are not familiar with electrical work, it is best to seek professional help when installing a new relay. However,I, being an experienced DIYer have installed many relays myself over time so I‘ll give you some general steps below:
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Gather Materials:You will need wire cutters/strippers/crimpers/wrenches/screwdrivers/sockets/wire/terminal connectors/heat shrink tubing/relay holder if desired/tape/fuse holder/fuse (optional).
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Determine location:Select where you want your new device mounted in relation to where it will be used (i.e., lights above windshield may require routing wire under headliner). Select location of fuse holder near battery or power source but out of harm’s way; attach ring terminal & ground lug there too if applicable; this may be done first but under hood work should be done while battery cable is disconnected unless battery is remote mounted from under hood area where work is being done then make sure that cable isn’t hot when attaching ground lug & fuse holder!
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Making Connections:You will need constant power & keyed power connections – constant power off battery: always hot regardless of key position; keyed power off ignition switch: only hot when key switch turned on (accessory position doesn’t count!). Connect constant power wire from fuse holder straight into +battery cable ring lug; attach keyed switched wire into ignition key switch position tap splice connector which pierces insulation without disturbing original connection – this may be difficult depending upon location of key switch but not impossible! From here routed wire(s) go into cab area via firewall grommet(s) &/
Author Profile
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Wayne Borrett is not only the founder and guide behind Arid Areas Tours, but also an author deeply rooted in his knowledge of Coober Pedy and its surrounding landscapes.
Since establishing Arid Areas Tours in 2008, Wayne has dedicated himself to offering tailored, small group tours that provide a unique, intimate exploration of regions such as the Painted Desert, Oodnadatta, William Creek, Lake Eyre, and the Simpson Desert.
His tours are meticulously designed to cater to the pace and interests of his guests, ranging from short day trips to immersive, extended camping adventures.
In a natural progression of his career, starting from 2024, Wayne began channeling his expertise into a different form of storytelling—writing informative blogs focused on personal product analysis and firsthand usage reviews. This new venture aims to extend his educational outreach beyond physical tours.
Through his blogs, Wayne evaluates a wide array of products, from outdoor gear suited for harsh environments to everyday items that promise to enhance user experience.
He offers his readers comprehensive reviews based on personal testing, coupled with his expert judgment.
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