Skip to content

The Best 12v 40 amp relay of 2023 – Reviewed and Top Rated

After hours researching and comparing all models on the market, we find out the Best 12v 40 amp relay of 2023. Check our ranking below.

2,703 (random number) Reviews Scanned

Rank No. #1
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)
  • Brand new heavy duty SPST(Single Pole Single Throw) relays with color-labeled wires.
  • Minimum operating voltage 8V, corresponding minimum operating current is 100mA; Standard operating voltage 12V, corresponding standard operating current is 150mA.
  • Small size/Low power consumption/High contact voltage/ High sensitivity.
  • Contact Material: Ag Alloy / Contact Resistance: ≤ 100MΩ.
  • Life Expectancy Electrical: 100,000 Operation, Life Expectancy Mechanical: 10,000,000 Operation.
Rank No. #2
EHDIS Car Relay 4 Pin 12v 40amp Spst Model No.: JD2912-1H-12VDC 40A 14VDC, Auto Switches & Starters,Pack of 2
  • Heavy duty 4-prongs SPST relays, jd1912 12v 40a relay
  • Use optional Relay Harness, or female Crimp Connectors
  • High 40A coil capacity- able to handle those high current applications with ease
  • Package Include: 2 x 40A 4-Pin 12V Vehicle Relays
  • The Automotive relay is suitable for normal automobile use and simple to operate, you just need to connect the relay with the wire, no other tools needed, convenient for your use and replace, allowing your components to work properly
SaleRank No. #3
Car Relay,12V 40A ABS Replacement Switching Fan Relay Heavy Duty
  • High Quality: Fan relay outer casing is made of ABS plastic, which is wear-resistant and , with high quality and long service life.
  • Applicability:Used to switch single or dual speed fan motors. Compact, fully enclosed design for powerful heating and cooling applications.
  • High Performance: Professional production, according to the original specifications, stable performance and high reliability.
  • Easy To Install:Easy to install, easy to replace damaged, but recommended for professional installation.
Rank No. #4
Viair 93940 40 Amp Air Compressor Relay for 12 Volt compressor , Black
  • 40 Amp 12v Relay with Mounting Tabs
  • Four 1/4 inch spade post connectors
  • Handles up to 40 amperes maximum ampere draw in applications
  • Each compressor must have its own relay for a proper installation
  • Mounting tab for relay molded into moisture resistance relay case
Rank No. #5
JD1912 Automotive Relay 4-Pin 40A 12V SPST Car Truck Van Motorcycle Boat Relay,5 Pack
  • 4-Pin SPST (Single Pole Single Throw) Relay
  • Contact Rating: NO: DC 12V 40A , NC : DC 12V 30A
  • Hight Switching Capability: Max 40A
  • Use optional Relay Harness, or female Crimp Connectors
  • High quality,mechanical life of 10,000+ cycles
Rank No. #6
irhapsody 5 Pack 40/30 AMP 12V DC Waterproof Relay and Harness - Heavy Duty 12 AWG Tinned Copper Wires, 5-PIN SPDT Automotive Relay
  • Never go beyond its capabilities. Try to stay 10 to 15% below what the rate is for
  • 12-volt 5-prong relay. Excellent water-repellent and dustproof ability, but not using it in water
  • Be careful when inserting the relay into the socket. If you force it, you will bend the female connectors
  • Primary leads use 12 a.w.g tinned copper wire. Coil leads use 16 a.w.g
  • Nominal Coil Voltage: 12 V DC; Coil Power: 1.8 W; Coil Resistance: 80 Ω; Must Operate Voltage: 6~8 V DC; Must Release Voltage: 0.6~3.6 V DC; Maximum Applied Voltage: 15.6 V DC
Rank No. #7
ESUPPORT 12V 40A Car Automotive Van Boat Truck 4 Pins SPST Alarm Relay Air Heavy Pack of 5
  • Voltage: 12V, Current: 40A
  • Pin Number: 4 Pin, SPST contact type
  • Mechanical life of 100,000+ cycles, Life Expectancy Mechanical: 10,000,000 Operations.
  • High 40A coil capacity- able to handle those high current applications with ease.
  • Suitable for a device draws heavy amperage such as car alarms, remote starts, HID headlights, pop doors, trunk releases strobe lights, fog lights, stereos, fans, air horns and so on.
Rank No. #8
MICTUNING LED Light Bar Work Light Wiring Harness Relay 40 Amp
  • MICTUNING 12V 40A relay,it is a great replacement for light bar.
  • Suitable for Most LED light bar wiring harness kit
  • Easy to use,just Plug in connector and secured.
  • Package included:1x relay.Pls note:this relay do not include a harness.If you need a relay and harness kit pls choose MICTUNING 5Pack Relay.
Rank No. #9
YiePhiot 2 Pack Car Relay 4 Pin 12V 40 Amp Model No : JD2912-1H-12VDC 40A 14VDC, Car Relay Switch Auto Switches & Starters
  • Brand new Car Relay 4 Pin 12v 40amp Model No : JD2912-1H-12VDC 40A 14VDC
  • Use optional Relay Harness, or female Crimp Connectors
  • Hundreds of uses include- starter kills, domelight supervision, trunk release, polarity change,power door lock/actuator control, change a low current output to high current,add ignition/accessory outputs, control motors/other electronics, It is Also suitable for automobile used for control, alarms, horn, headlight and more....
  • Package Include: 2 x 40A 4-Pin 12V Vehicle Relays,
  • Mechanical life of 10,000+ cycles
Rank No. #10
EPLZON JD1914 Relay 12V 40A 5 Pin Car Relay 584416 586147 586224 for Johnson Evinrude OMC Outboard Marine Corp (Pack of 2 Pcs)
  • ✅Product Name:JD1914 Automotive DC 5 Pin 12V 40A SPST electrical relay Relay,high quality copper coils and silver contacts create excellent electrical conductivity
  • ✅Contact Rating: NO: DC 12V 40A , NC : DC 12V 30A
  • ✅Brand new heavy duty 4-prongs SPST relays
  • ✅Pin Specifications: 30-High power feed,85-Relay coil ground,86-relay coil feed(trigger wire),87-high power output(normally open contact),87a-high power output(normally closed contact)
  • ✅Replaces part number:582195, 582472, 582473, 584416, 586147, 586224;Application:Compatible with Johnson,Compatible with Evinrude,Compatible with Outboard Marine Corp and OMC
Rank No. #11
5 Packs 40 AMP 14V DC Waterproof Relay with Harness,Heavy Duty 12 AWG Tinned Copper Wires,4 PIN SPST Bosch Style 12 Volt Automotive Relay,Model No.: JD2912-1H-12VDC 40A 14VDC
  • 12 AWG tinned copper wires for Pin 30, Pin 87,Length: 5.1in;16 AWG tinned copper wires for Pin 85, Pin 86. Length: 5.1in
  • HIGH SWITCHING CAPABILITY - 12V DC (14V Max) and 40A, bosch style, 4-Pin SPDT (Single Pole Single Throw) relay.
  • Nominal Coil Voltage: 12 V DC; Coil Power: 1.8 W; Coil Resistance: 100Ω; Must Operate Voltage: 6~8 V DC; Must Release Voltage: 0.6~3.6 V DC; Maximum Applied Voltage: 15.6 V DC.
  • WATERPROOF RELAY - Perfect waterproof construction, excellent performance of waterproof, dust proof and moisture proof, works well in any weather conditions
  • WIDE APPLICATION - Suit for all automobiles and devices equipped with a 12 Volt DC power source. Used in led work light, fog lamps, starter, wiper, fans, speakers, central locking, alarm, electric windows, etc.
SaleRank No. #12
uxcell 2 Pcs Z1507091/4 4 Pin DC 12V 40A Universal Car Vehicle Motor Fuse Relay Switch Power
  • Pin Number: 4; Voltage: DC 12V; Amp:40A
  • Dimension: 6x2.5x2.2cm / 2.36"x0.98"x0.87"(L*W*H); Contact Type: SPST
  • Made of metal and plastic, durable materials for long time service.
  • Suitable for cars and motorcycles. It is recommended to confirm the model, appearance, and function before placing an order.
  • Make sure this is the correct relay replacement your car need before purchase.
Rank No. #13
EHDIS 12V Motor Relay 5 Pin Coil 40amp Spdt Model No.: JD2912-1Z-12VDC 40A 14VDC, Contactor Relay Switch Power, Auto Switches & Starters, 2 Pack
  • 5 Pin Single Pole, Double Throw SPDT so contact can be wired for normally closed or normally open operation
  • Uses: Trunk Pop Up, Remote Start Up, Lighting, and More!
  • High 40A coil capacity- able to handle those high current applications with ease
  • Automotive changeover relay with 5-pins suitable for general purpose automotive uses and with a 40A switching capability.
  • Package Include: 2 x 40A 5-prong 12V Vehicle Relays
Rank No. #14
Car Relays 12V 4 Pin 40amp Spdt Model JD2912-1H-12VDC 40A 14VDC, Tractor Truck Boat Auto Switches & Starters, 2 Pack
  • Package included: 2Pcs Car Relay 4 Pin 12v 40amp Model No : JD2912-1H-12VDC 40A 14VDC
  • 4 Pin High Quality Durable Terminal. Heavy Duty Make or Break(on/off) Relay
  • These are heavy duty 40A relays. This kit can be used to install electric cooling fans, Electric fuel pumps, Electric water Pumps, Shaved door handles solenoids, Trunk solenoids, Horns.
  • Mechanical life of 10,000+ cycles, Large Capacity,40A Split Charge Relay,Ideal for any 12V Applicatio
  • Using this kit will eliminate a high voltage drop in the wire, so it allows your components to work properly
Rank No. #15
XtremeAmazing Pack of 2 Car Relay Socket Harness JD1912 12V 40A 4 Pin SPST Wires for Automotive Truck Van Motorcycle Boat Switches Starters Set
  • 40Amp Connector Socket with 4 Terminals design
  • Relay load: 40A/12VDC
  • Contact Resistance: ≤ 100MΩ
  • Package Contents: 2 x 40A 4-Pin 12V Vehicle Relay, 2 x Pre-wired socket
Rank No. #16
EPLZON JD1912 Relay 4 Pin 40A 12V SPST Car Truck Van Motorcycle Boat Relay (Pack of 2 pcs)
  • ✅Product Name:JD1912 Automotive DC 4 Pin 12V 40A SPST electrical relay Relay,high quality copper coils and silver contacts create excellent electrical conductivity
  • ✅Contact Rating: NO: DC 12V 40A , NC : DC 12V 30A
  • ✅Pin Specifications: 30-High power feed,85-Relay coil ground,86-relay coil feed(trigger wire),87-high power output(normally open contact)
  • ✅Function: This relay will eliminate a high voltage drop in the wire, so it allows your components to work properly.50A high coil capacity can easily handle those high current applications
  • ✅Application: Widely used to install electric cooling fans,Horns, Shaved door handles solenoids, Electric fuel pumps, Electric water Pumps, Trunk solenoids, automotive setups,security systems,car sound systems,and various other applications.
Rank No. #17
irhapsody 4-PIN 40/30AMP 12V DC Waterproof Relay with Harness - Heavy Duty 12 AWG Tinned Copper Wires, 1 Pack SPST Automotive Relay
  • Never go beyond its capabilities. Try to stay 10 to 15% below what the rate is for
  • 12-volt 4-prong relay. Excellent water-repellent and dustproof ability, but not using it in water
  • For the people whose relays are burning, please make sure you are making tight connections (especially on the load wires), read the specs on the item description, and ensure that the operating environment meets the safety requirements of the relay
  • Be careful when inserting the relay into the socket. If you force it, you will bend the female connectors
  • Thick 12 gauge wire for the load terminals. Easy to install just make sure you follow the wiring diagram. Works for both positive and negative activation
Rank No. #18
Car Fan Relay Replacement, Automotive Relay 12V 40A, Heavy Duty Switching Fan Relay for Heating and Cooling Applications
  • Applicable Scope: This car fan relay is used for switching single or two speed fan motors. Compact, totally enclosed design for heating and cooling applications
  • Durable Material: The relay casing is made of high-quality ABS plastic material for good wear resistance, durable for long service life
  • Easy installation: The fan relay is easy to install, convenient to replace the old or broken one
  • Practical to Use: The fan relay features high performance and strong stability
  • Warm Prompt: Please pay attention to the specifications of this fan relay, confirm this is the product you need before purchasing
SaleRank No. #19
Hamolar 2 Pack 12V 40/30 Amp Car Relay DC 5 Pin SPDT and Harness - Heavy Duty 12 AWG Copper Wires Relays Kit Bosch Style for Automotive Truck Van Motorcycle Boat
  • The 12v relay harness base contains 3*12 AWG and 2*16 AWG cables, length: 5.5 in, which have higher load-bearing capacity and more stable performance.
  • Function: 12VDC (14V Max) 5 Pin SPDT (Single Pole Double Throw) Relay with 40A/30A High Switching Capability.
  • Wire Specifications: White - Ground (85), Blue - VDC (30), Black - Trigger (86), Red - Output N/C (87a), and Yellow - Output N/O (87).
  • The dc car relay adopts waterproof sealing technology at the bottom and a fixed back strip on the back, which is suitable for various complicated installation environments.
  • Relay and harness kit made by high-grade flame retardant materials to ensure superior quality and long lifespan. 2 Years Warranty.

Last update on 2023-08-09 / Affiliate links / Product Titles, Images, Descriptions from Amazon Product Advertising API

How Do You Buy The Best 12v 40 amp relay?

Do you get stressed out thinking about shopping for a great 12v 40 amp relay? Do doubts keep creeping into your mind? We understand, because we’ve already gone through the whole process of researching 12v 40 amp relay, which is why we have assembled a comprehensive list of the greatest 12v 40 amp relay available in the current market. We’ve also come up with a list of questions that you probably have yourself.

We’ve done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for 12v 40 amp relay that you consider buying. Your questions might include the following:

  • Is it worth buying an 12v 40 amp relay?
  • What benefits are there with buying an 12v 40 amp relay?
  • What factors deserve consideration when shopping for an effective 12v 40 amp relay?
  • Why is it crucial to invest in any 12v 40 amp relay, much less the best one?
  • Which 12v 40 amp relay are good in the current market?
  • Where can you find information like this about 12v 40 amp relay?

We’re convinced that you likely have far more questions than just these regarding 12v 40 amp relay, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for 12v 40 amp relay, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible 12v 40 amp relay. Make sure that you are only using trustworthy and credible websites and sources.

We provide an 12v 40 amp relay buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information. How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available 12v 40 amp relay currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of 12v 40 amp relay has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an 12v 40 amp relay?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your 12v 40 amp relay.
  5. Customer Ratings: Number ratings grade 12v 40 amp relay objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their 12v 40 amp relay.
  7. Product Quality: You don’t always get what you pay for with an 12v 40 amp relay, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an 12v 40 amp relay is should be an indication of how long it will work out for you.

We always remember that maintaining 12v 40 amp relay information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding 12v 40 amp relay is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly! We’re here for you all the time. Contact us here. Or You can read more about us to see our vision.

Related Post: