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The Best 40 Amp Relay of 2022 – Reviewed and Top Rated

After hours researching and comparing all models on the market, we find out the Best 40 Amp Relay of 2022. Check our ranking below.

2,142 Reviews Scanned

Rank No. #1
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
Rank No. #2
Gebildet JD1912 Car Relay Harness 12V 40A 4 Pin SPST 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. #3
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. #4
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. #5
Nilight 50003R Automotive Set 5-Pin 30/40A 12V SPDT with Interlocking Relay Socket and Wiring Harness-5 Pack, 2 Years Warranty
  • High switching capability: Normally open 40A/14V DC and normally close 30A/14V DC. Suitable for Nilight LED light bar wiring harness kit
  • Premium quality: Durable relay and harness socket with 5 wires; Made by high-grade materials to ensure superior quality and long lifespan
  • Male-female slot design: Unique male-female slot design, easy to connect the relay with harness socket, clean and neat after installation
  • Easy wiring: The relay sockets come with different colors for loads/accessories, simple and convenient wiring
  • Package include: 5 x relay and 5 x relay socket with wires.Fit type: Universal fit
Rank No. #6
Bosch Automotive 0332019157 Normal Open Mini Relays - 4 Pins, 12 V, 40 A
  • [BOSCH EXPERTISE] - Bosch has been producing relays for vehicles and other applications for more than 40 years - this vast development experience ensures continuous advancement in design features to deliver optimum performance
  • [COMPACT SWITCHING] - Bosch Mini Relays feature a compact design and are used in a wide range of vehicles to perform switching operations
  • [PREMIUM PERFORMANCE] - Bosch relays incorporate only the highest quality materials for reliable, long-term performance and a 250,000 switching cycle capability
  • [SUPERIOR ENGINEERING] - Engineered with high corrosion resistance to ensure long term reliability in harsh environments and conditions
  • 4 pins, 12V, 40A; Integral bracket mount; Black
Rank No. #7
Kalmaegee 5 Pack Car Relays 12V 40A, 4 Pin Relay Spst Model JD2912-1H-12VDC 40amp 14VDC, Automotive Switches and Starters, SPST Relay for Car, Truck, Motorcycle, Boat
  • 【Superior Quality】The 5pcs relays are made with composite material that's both durable and electrically insulated. The silver alloy contact and copper coil ensure stable performance.
  • 【5 Pack Relays】Heavy duty 4 pole SPST (Single Pole Single Throw) relay is 12v 40amp. You'll have enough relays to meet your needs and even share them with friends and family.
  • 【Widely Application】The relay is perfect for automotive tail lights, electric cooling fans, starters, headlights, horns, fog lights, rear window defrosters, blower motors, trunk solenoids, and more.
  • 【Easy To Use】Just need to connect the relay with the wire, a few seconds can be completed installation. Convenient for your use and replacement. The compact size also makes them easy to store.
  • 【Kalmaegee Service】If you have any questions about the product, please feel free to contact us and we will reply you as soon as possible and provide you with comfortable service
Rank No. #8
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. #9
10 Pack 30/40 AMP Waterproof 5-Pin 12V Relay Switch (SPDT)for 12 Volt Automotive Marine Relays for Boats Auto Fan Cars
  • 12V waterproof 5-Pin SPDT Relay Excellent waterproof and dustproof ability, high quality in any weather conditions
  • 12V 5-Pin SPDT Relay Pin Specifications: Ground (85), VDC (30), Trigger (86), Output N/C (87a), and Output N/O (87).
  • SPDT Relay with 40A/30A High Switching Capability,it 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.
  • 12v relays can operate with anywhere between 9v and 14v,Very suitable for 12V automotive, marine, and machine circuits.
  • These 12V 5-pin relays are rated to handle 30A on normally closed pin 87a and 40A on normally open pin 87.
Rank No. #10
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

Last update on 2023-09-16 / Affiliate links / Images from Amazon Product Advertising API

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  1. Brand Value: Every brand of 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 40 Amp Relay?
  3. Specifications: How powerful they are can be measured.
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  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their 40 Amp Relay.
  7. Product Quality: You don’t always get what you pay for with an 40 Amp Relay, sometimes less, and sometimes more.
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