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Best 12v Dc 4 Pin Relay With Diode of 2026
Last updated on 31/03/2026
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1
irhapsody 5 Pack 40/30 AMP 12V DC Waterproof Relay and Harness - Heavy Duty 12 AWG Tinned Copper Wires, 5-PIN SPDT Automotive Relay
iRhapsody
7% Off
Why we love it
Reliable water-repellent design.
High-quality copper wire construction.
Easy installation without forcing connectors.
Main Highlights
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
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9.8
Exceptional
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9.8
Exceptional
iRhapsody
irhapsody 5 Pack 40/30 AMP 12V DC Waterproof Relay and Harness - Heavy Duty 12 AWG Tinned Copper Wires, 5-PIN SPDT Automotive Relay
7% Off
Check Price
Show More
Why we love it
Reliable water-repellent design.
High-quality copper wire construction.
Easy installation without forcing connectors.
Main Highlights
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
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Value for Money
2
Gebildet 4 Pin Heavy Duty High Current Relay Battery Isolator 12V DC 500 Amp Vehicle SPST Contactor Double Isolator Control On/Off Switch
Gebildet
Why we love it
Heavy duty for safer work.
High current handling capability.
Versatile for various applications.
Main Highlights
Sturdy and Durable A high performance relay can make your work safer and more efficient. Durable construction for improved high temperature resistance.
Rated voltage 12VDC, this car relay with red copper terminal ensures strong current can be transmitted safely, maximum instantaneous continuity current 500A, long working time max 200A.
Compatibility The relay is an automatic switching element with isolation function, widely used in remote control, telemetry, communication, automatic control, mechatronics and power electronics.
Perfect for split charging or various automotive applications.
Package: 1 x 12 V 500 A relay
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9.7
Exceptional
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9.7
Exceptional
Gebildet
Gebildet 4 Pin Heavy Duty High Current Relay Battery Isolator 12V DC 500 Amp Vehicle SPST Contactor Double Isolator Control On/Off Switch
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Why we love it
Heavy duty for safer work.
High current handling capability.
Versatile for various applications.
Main Highlights
Sturdy and Durable A high performance relay can make your work safer and more efficient. Durable construction for improved high temperature resistance.
Rated voltage 12VDC, this car relay with red copper terminal ensures strong current can be transmitted safely, maximum instantaneous continuity current 500A, long working time max 200A.
Compatibility The relay is an automatic switching element with isolation function, widely used in remote control, telemetry, communication, automatic control, mechatronics and power electronics.
Perfect for split charging or various automotive applications.
Package: 1 x 12 V 500 A relay
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3
X AUTOHAUX 5 Pcs Waterproof Relay DC 12V 60A, 4 Pin Relay Car Charge Case
X AUTOHAUX
Why we love it
Universal fit for various vehicles.
Compact size and low power.
Durable for harsh conditions.
Main Highlights
UNIVERSAL FIT - Power Relay is universal for most suitable for most for cars trucks SUVs, durable Power Relay.
UNIQUE BENEFITS - Power Relay is small size, low power consumption, High contact voltage and High sensitivity.
SPECIAL FEATURES - Good quality composite housings protect against harsh temperatures and severe under bonnet conditions
EASYINSTALLATION - Relay Switch is easy to install and remove, ideal replacement for the old or broken one.
PACKAGE CONTENT: Package includes 5 Pcs Power Relay
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9.6
Superb
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9.6
Superb
X AUTOHAUX
X AUTOHAUX 5 Pcs Waterproof Relay DC 12V 60A, 4 Pin Relay Car Charge Case
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Why we love it
Universal fit for various vehicles.
Compact size and low power.
Durable for harsh conditions.
Main Highlights
UNIVERSAL FIT - Power Relay is universal for most suitable for most for cars trucks SUVs, durable Power Relay.
UNIQUE BENEFITS - Power Relay is small size, low power consumption, High contact voltage and High sensitivity.
SPECIAL FEATURES - Good quality composite housings protect against harsh temperatures and severe under bonnet conditions
EASYINSTALLATION - Relay Switch is easy to install and remove, ideal replacement for the old or broken one.
PACKAGE CONTENT: Package includes 5 Pcs Power Relay
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4
QitinDasen 5 Pieces 4 Pin Car Relay, 12V 40A SPST Automotive Relay with Harness Socket and 14/16 AWG Pre-Wired, for Car Truck Boat (Black)
QitinDasen
12% Off
Why we love it
Easy installation with pre-wired harness.
Versatile for various automotive applications.
Customer support is highly responsive.
Main Highlights
Professional 4 pin automotive relay with SPST design (Single Pole Single Throw), suitable for normally closed or normally open circuits.
The relay comes with harness socket and 14/16 AWG pre-wired. The harness socket has a unique male and female groove structure design on the edge, which can connect all relays together. Pre-wired with 4 different color-coded wires for easy connection of loads and accessories.
Comes with free metal mounting bracket for easy installation and fixing.
Suitable for all automobiles and devices equipped with 12V DC power supply. Widely used for car lights, Indicator light, fog lamps, wiper, central locking, alarm, electric windows, etc.
If you have any questions about the products you ordered, please contact us in time, we will try our best to provide you with satisfactory service. We always care about customer experience and strive to improve product functions and details.
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9.6
Superb
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9.6
Superb
QitinDasen
QitinDasen 5 Pieces 4 Pin Car Relay, 12V 40A SPST Automotive Relay with Harness Socket and 14/16 AWG Pre-Wired, for Car Truck Boat (Black)
12% Off
Check Price
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Why we love it
Easy installation with pre-wired harness.
Versatile for various automotive applications.
Customer support is highly responsive.
Main Highlights
Professional 4 pin automotive relay with SPST design (Single Pole Single Throw), suitable for normally closed or normally open circuits.
The relay comes with harness socket and 14/16 AWG pre-wired. The harness socket has a unique male and female groove structure design on the edge, which can connect all relays together. Pre-wired with 4 different color-coded wires for easy connection of loads and accessories.
Comes with free metal mounting bracket for easy installation and fixing.
Suitable for all automobiles and devices equipped with 12V DC power supply. Widely used for car lights, Indicator light, fog lamps, wiper, central locking, alarm, electric windows, etc.
If you have any questions about the products you ordered, please contact us in time, we will try our best to provide you with satisfactory service. We always care about customer experience and strive to improve product functions and details.
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5
mxuteuk 2pcs HH54P DC 12V LED Indicator Electromagnetic Power Relay 14 Pin 3A Coil Relays 4PDT with Socket Base,with DIN Slotted Aluminum Rail
mxuteuk
Why we love it
High contact capacity reliability.
Easy DIN rail mounting solution.
Includes essential accessories for installation.
Main Highlights
Product Name:Electromagnetic Power Relay; Relay Model : HH54P; Type : 4PDT; Number of Terminals : 14 ; Socket Model : PYF14A-E
Mount Rail Type : 35mm DIN Rail; DIN Rail length : 100mm/4"(L)
Coil Voltage:DC 12V; Contact Capacity: 3A 250VAC/3A 28VDC;
Overall size(approx. ): 75 x 29 x 65mm/3" x 1.1" x 2. 6"(L*w*h)
Package Content : 2 x Power Relay + 2 x Socket + 1 x Rail Slotted Aluminum + 2 x Screw
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9.4
Superb
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9.4
Superb
mxuteuk
mxuteuk 2pcs HH54P DC 12V LED Indicator Electromagnetic Power Relay 14 Pin 3A Coil Relays 4PDT with Socket Base,with DIN Slotted Aluminum Rail
Check Price
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Why we love it
High contact capacity reliability.
Easy DIN rail mounting solution.
Includes essential accessories for installation.
Main Highlights
Product Name:Electromagnetic Power Relay; Relay Model : HH54P; Type : 4PDT; Number of Terminals : 14 ; Socket Model : PYF14A-E
Mount Rail Type : 35mm DIN Rail; DIN Rail length : 100mm/4"(L)
Coil Voltage:DC 12V; Contact Capacity: 3A 250VAC/3A 28VDC;
Overall size(approx. ): 75 x 29 x 65mm/3" x 1.1" x 2. 6"(L*w*h)
Package Content : 2 x Power Relay + 2 x Socket + 1 x Rail Slotted Aluminum + 2 x Screw
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6
Weasch 2 Pack 12V Waterproof Relay Kit, with Built-in Diode 12 AWG Harness Socket, 40/30A Heavy Duty SPDT 5 Pin Relay Switch, for Automotive Car Marine Boat
Weasch
Why we love it
Built-in diode protection.
IP65 waterproof design.
Wide automotive compatibility.
Main Highlights
【40A Relay】Rated Coil Voltage: 12V DC; Max. Rated Switching Current: 40/30A; Coil Power: 1.8W; Coil Resistance: 80 Ω; Never go beyond its capabilities. Try to stay 10 to 15% below what the rate is for
【Built-in Diode】This 12V relay has a built-in diode to absorb the induced voltage generated in the coil when the automotive relay switches states, thus protecting electronic components from damage caused by the induced voltage
【12AWG Harness】 The wires which come with this relay socket are 12AWG/16AWG design, Yellow 16AWG - Ground (85), Red 12AWG - VDC (30), White 16AWG - Trigger (86) and Blue 12AWG - Output N/O (87), Black 12AWG - N/C(87a)
【IP65 Waterproof】The 4-pin relay is tightly sealed with a sturdy cover and sealing ring, with excellent waterproof, dustproof and moisture-proof performance, and can work normally in weather conditions
【Wide Application】 The 12v waterproof relay acts as a bridge between switches and devices, helps to control large rated devices by small rated switches, suitable for cars, cars, trucks, boats, etc.
Package: 1 PCS 12V DC Waterproof Relay and Harness
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9.3
Superb
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9.3
Superb
Weasch
Weasch 2 Pack 12V Waterproof Relay Kit, with Built-in Diode 12 AWG Harness Socket, 40/30A Heavy Duty SPDT 5 Pin Relay Switch, for Automotive Car Marine Boat
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Why we love it
Built-in diode protection.
IP65 waterproof design.
Wide automotive compatibility.
Main Highlights
【40A Relay】Rated Coil Voltage: 12V DC; Max. Rated Switching Current: 40/30A; Coil Power: 1.8W; Coil Resistance: 80 Ω; Never go beyond its capabilities. Try to stay 10 to 15% below what the rate is for
【Built-in Diode】This 12V relay has a built-in diode to absorb the induced voltage generated in the coil when the automotive relay switches states, thus protecting electronic components from damage caused by the induced voltage
【12AWG Harness】 The wires which come with this relay socket are 12AWG/16AWG design, Yellow 16AWG - Ground (85), Red 12AWG - VDC (30), White 16AWG - Trigger (86) and Blue 12AWG - Output N/O (87), Black 12AWG - N/C(87a)
【IP65 Waterproof】The 4-pin relay is tightly sealed with a sturdy cover and sealing ring, with excellent waterproof, dustproof and moisture-proof performance, and can work normally in weather conditions
【Wide Application】 The 12v waterproof relay acts as a bridge between switches and devices, helps to control large rated devices by small rated switches, suitable for cars, cars, trucks, boats, etc.
Package: 1 PCS 12V DC Waterproof Relay and Harness
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7
Gebildet 2pcs 40/30 Amp Waterproof Relay Switch 12AWG Harness Set with Built-in Diode- 12V DC 4-Pin SPST Automotive Relays Hot Wires
Gebildet
Why we love it
Waterproof design for all conditions.
Heavy duty wiring for durability.
Color-coded wires for easy installation.
Main Highlights
✪ Waterproof automotive relay with 12V DC (max. 14V). Note: 12V and 14V are coil voltages, not the voltage that triggers the switch.
✪ Wire specifications: Black - Ground (85), Red - VDC (30), White - Trigger (86), and Blue - Output - N/O (87)
✪ Excellent waterproof performance, high quality in all weather conditions
✪ Pre-wired harness - Heavy-duty 12AWG wire harness.
✪ Integrated diode: Each relay features a built-in diode that suppresses the induced voltage during switching, protecting your electrical components from potential damage.
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9.1
Superb
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9.1
Superb
Gebildet
Gebildet 2pcs 40/30 Amp Waterproof Relay Switch 12AWG Harness Set with Built-in Diode- 12V DC 4-Pin SPST Automotive Relays Hot Wires
Check Price
Show More
Why we love it
Waterproof design for all conditions.
Heavy duty wiring for durability.
Color-coded wires for easy installation.
Main Highlights
✪ Waterproof automotive relay with 12V DC (max. 14V). Note: 12V and 14V are coil voltages, not the voltage that triggers the switch.
✪ Wire specifications: Black - Ground (85), Red - VDC (30), White - Trigger (86), and Blue - Output - N/O (87)
✪ Excellent waterproof performance, high quality in all weather conditions
✪ Pre-wired harness - Heavy-duty 12AWG wire harness.
✪ Integrated diode: Each relay features a built-in diode that suppresses the induced voltage during switching, protecting your electrical components from potential damage.
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8
Gebildet 3pcs 12V Fuse Relay Switch 12 AWG Harness Set with Built-in Diode- 30A ATO/ATC Blade Fuse, 4-Pin SPST Automotive Electrical Relays
Gebildet
Why we love it
Built-in fuse, space-saving design.
Easy, color-labeled wiring setup.
Neat, interlocking mounting design.
Main Highlights
Upgraded Version - Automotive relays built in fuse socket with included 30A blade fuse, no need of a separate fuse holder, saving space and money. Heavy duty 12AWG wires for main contact
Integrated Diode: Each relay includes a built-in diode that suppresses induced voltage during switching, safeguarding your electrical components from potential damage.
Neat Mounting Design - The interlocking design of unique male-female slot on each socket edge, easy to connect all relays together, offering clean and neat installation
Good Construction - 12V DC (Max14V DC) and 30A High Switching Capability. 4-Pin SPST (Single Pole Single Throw) Relay. Metal mounting bracket on the electrical relay promotes easy installation
Wide Application - Wide range of use, greatly used for car lights, fog lamps, wiper, starter, fans, speakers, traction control systems, etc
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9.0
Superb
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9.0
Superb
Gebildet
Gebildet 3pcs 12V Fuse Relay Switch 12 AWG Harness Set with Built-in Diode- 30A ATO/ATC Blade Fuse, 4-Pin SPST Automotive Electrical Relays
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Why we love it
Built-in fuse, space-saving design.
Easy, color-labeled wiring setup.
Neat, interlocking mounting design.
Main Highlights
Upgraded Version - Automotive relays built in fuse socket with included 30A blade fuse, no need of a separate fuse holder, saving space and money. Heavy duty 12AWG wires for main contact
Integrated Diode: Each relay includes a built-in diode that suppresses induced voltage during switching, safeguarding your electrical components from potential damage.
Neat Mounting Design - The interlocking design of unique male-female slot on each socket edge, easy to connect all relays together, offering clean and neat installation
Good Construction - 12V DC (Max14V DC) and 30A High Switching Capability. 4-Pin SPST (Single Pole Single Throw) Relay. Metal mounting bracket on the electrical relay promotes easy installation
Wide Application - Wide range of use, greatly used for car lights, fog lamps, wiper, starter, fans, speakers, traction control systems, etc
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9
WMYCONGCONG 5 PCS DC 12V 80A 1NO SPST 4 Pin Relay Car w/Light Emitting Diodes Light Transparent Case for Car Truck Automotive
WMYCONGCONG
Why we love it
High-current welded connections ensure reliability.
Durable housings withstand harsh temperatures.
Versatile for various car applications.
Main Highlights
Heavy duty SPST relays, 12V 80A 4 prongs high-current welded connections for reliability.
Rating: DC 12V 80A.
High quality composite housings protect against harsh temperatures and severe under hood conditions.
Designed with copper terminals, ideal to be used for many car electronic application, for car alarms, remote starts, HID headlights, pop doors, trunk releases strobe lights, fog lights, stereos.
Package Content: 5 * 12V 80A Car Relay + 5 * Silver Tone Terminal Accessory.
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8.9
Excellent
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8.9
Excellent
WMYCONGCONG
WMYCONGCONG 5 PCS DC 12V 80A 1NO SPST 4 Pin Relay Car w/Light Emitting Diodes Light Transparent Case for Car Truck Automotive
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Why we love it
High-current welded connections ensure reliability.
Durable housings withstand harsh temperatures.
Versatile for various car applications.
Main Highlights
Heavy duty SPST relays, 12V 80A 4 prongs high-current welded connections for reliability.
Rating: DC 12V 80A.
High quality composite housings protect against harsh temperatures and severe under hood conditions.
Designed with copper terminals, ideal to be used for many car electronic application, for car alarms, remote starts, HID headlights, pop doors, trunk releases strobe lights, fog lights, stereos.
Package Content: 5 * 12V 80A Car Relay + 5 * Silver Tone Terminal Accessory.
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10
Gebildet 2pcs Car Relay Harness 12V 40A 4 Pin SPST Harness Sockets with Color-labeled Wires for Automotive Truck Motorcycle Boat
Gebildet
Why we love it
High capability for various applications.
Compact design for easy installation.
Long-lasting with excellent performance.
Main Highlights
Brand new heavy duty SPST(Single Pole Single Throw)relays with color-labeled wires.
Rated operational voltage:12V/Switching Capability:40A.
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.
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8.9
Excellent
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8.9
Excellent
Gebildet
Gebildet 2pcs Car Relay Harness 12V 40A 4 Pin SPST Harness Sockets with Color-labeled Wires for Automotive Truck Motorcycle Boat
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Why we love it
High capability for various applications.
Compact design for easy installation.
Long-lasting with excellent performance.
Main Highlights
Brand new heavy duty SPST(Single Pole Single Throw)relays with color-labeled wires.
Rated operational voltage:12V/Switching Capability:40A.
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.
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