REVIEWS
Daqian World Commodity Store 40 Amp Relay of 2026
By Daqian World Commodity Store Editor • 2026-09-20
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Daqian World Commodity Store 40 Amp Relay
of September 2026
1

Best Choice
EHDIS
EHDIS Car Relay 4 Pin 12v 40amp Spst Model No.: JD2912-1H-12VDC 40A 14VDC, Auto Switches & Starters,Pack of 2
2

Best Value
ONLINE LED STORE
6 Pack Bosch Style 5-Pin 12V Relay Kit [Interlocking Harness Socket Holder] [14 AWG Hot Wires] [SPDT] [30/40 Amp] 12 Volt Automotive Relays for Auto Fan Cars
3
Nilight
Nilight 50003R Automotive Set 5-Pin 30/40A 12V SPDT with Interlocking Relay Socket and Wiring Harness-5 Pack, 2 Years Warranty
4
ONLINE LED STORE
10 Pack Bosch Style 5-Pin 12V Relay Switch [SPDT] [30/40 Amp] 12 Volt Automotive Relays for Auto Fan Cars
5
Nilight
Nilight SPDT Relay Replacement 12V 5 Prong SPDT Auto Tilt Trim Relay (Pack of 10) 40/30 AMP Electrical Power Relay Switch 5 Pin Bosch Style Relay for Automotive Cars Marine Boats,2 Years Warranty
6
APIELE
APIELE 4 Pin Relay 12V 40A Relay with 30A Fuse DC SPST Fused Relay Normally Open 1NO with 14 AWG Harness Socket for Car Truck Motor (6 Pack)
7
Gebildet
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)
8
CH SHUODI
CH SHUODI 5 Pack 5-PIN Fire Retardant Relay with Harness 40 AMP 14AWG 12V DC 5Pin 30/40A 12V with Interlocking Relay Socket and Wiring Harness Relay Harness Spdt 12V Volt Relay with Wiring Harness
9
BLARYETI
JD1912 Automotive Relay 4-Pin 40A 12V SPST Car Truck Van Motorcycle Boat Relay5 Pack
10
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
11
KEYHAO
10 Pack 30/40 AMP Waterproof 5-Pin 12V Relay Switch SPDTfor 12 Volt Automotive Marine Relays for Boats Auto Fan Cars
12
EPAuto
5 Pack - EPAuto 30/40 AMP Relay Harness Spdt 12V, 5-PIN SPDT Bosch Style
13
VIAIR
Viair 93940 40 Amp Air Compressor Relay for 12 Volt compressor , Black
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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.
6 Pack Bosch Style 5-Pin 12V Relay Kit [Interlocking Harness Socket Holder] [14 AWG Hot Wires] [SPDT] [30/40 Amp] 12 Volt Automotive Relays for Auto Fan Cars
User Manual available for download under Product Information Details. Bosch style 12VDC 14V Max 5-Pin SPDT Single Pole Double Throw Relay with 40A30A High Switching Capability.. Interlocking design relay socket harness base for easy cable management organization.. Heavy duty 14AWG wires for the main contact and pre-wired with 6 pigtail leads.. Wire Specifications Black - Ground 85, Red - VDC 30, White - Trigger 86, Yellow - Output NC 87a, and Blue - Output NO 87..
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 40A14V DC and normally close 30A14V 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 loadsaccessories, simple and convenient wiring. Package include 5 x relay and 5 x relay socket with wires.Fit type Universal fit.
10 Pack Bosch Style 5-Pin 12V Relay Switch [SPDT] [30/40 Amp] 12 Volt Automotive Relays for Auto Fan Cars
User Manual available for download under Product Information Details. Bosch style 5-Pin SPDT Single Pole Double Throw Relay. 40A30A High Switching Capability.. Pin Specifications Ground 85, VDC 30, Trigger 86, Output NC 87a, and Output NO 87.. 10pc Included.
Nilight SPDT Relay Replacement 12V 5 Prong SPDT Auto Tilt Trim Relay (Pack of 10) 40/30 AMP Electrical Power Relay Switch 5 Pin Bosch Style Relay for Automotive Cars Marine Boats,2 Years Warranty
5 Pin SPDT Single Pole Double Throw Bosch Style Electrical Relay.. 40A30A High Switching Capability. These relays have a universal application and can be used in a 12 Volt DC power source, such as automotive setups, car sound systems, security systems, and various other applications.. Pin Specifications 30V DC. Ground 85, Trigger 86, Output NC 87a, and Output NO 87.. Maximum Applied Voltage 15.6 V DC Max Operating Voltage is 27V DC Nominal Coil Voltage 12 V DC Max Operating Current 40A Must Operate Voltage 68 V DC Must Release Voltage 0.63.6 V DC Coil Power 1.8 W Coil Resistance 80 Insulation Resistance 100M. Package include 10 pack electrical relays. Sockets are not included. 2 Year Warranty by Nilight..
APIELE 4 Pin Relay 12V 40A Relay with 30A Fuse DC SPST Fused Relay Normally Open 1NO with 14 AWG Harness Socket for Car Truck Motor (6 Pack)
Contact Type SPST 1NO Normally Open Pin Number 4 Pin Switch Capability 40A 13.5VDC.. Pin Specifications Ground 85, VDC 30, Trigger 86, Output NO 87.. Built in fuse socket with 30A blade fuse, 14 AWG heavy duty hot wire.. Widely used in automotive setups, power door lockactuator control, security systems, control motors, and various other applications.. Package ContentEach 4 pin relay has a 30A blade fuse and comes with a metal mounting bracket and 4 wire socket..
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 SPSTSingle 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 sizeLow power consumptionHigh contact voltage High sensitivity.. Contact Material Ag Alloy Contact Resistance 100M.. Life Expectancy Electrical 100,000 Operation, Life Expectancy Mechanical 10,000,000 Operation..
CH SHUODI 5 Pack 5-PIN Fire Retardant Relay with Harness 40 AMP 14AWG 12V DC 5Pin 30/40A 12V with Interlocking Relay Socket and Wiring Harness Relay Harness Spdt 12V Volt Relay with Wiring Harness
Contact rating 30A40A 14VDC ,Max.Switch Voltage75 VDC,Max Switch current 40A, Max.switching power560W. Electrical life100,000 operation, Mechanical life10,000,000 operation. Wire Specifications length 4.9 inch,WHITE16AWG 86, BLACK14AWG 30, RED14AWG 87, YELLOW16AWG 85,Blue14AWG 87A. Functions rear window defogger, battery disconnect device, car air conditioner, oil pump control, fog light, cooling fan control, headlight control etc.. Please read the instructions carefully before use, and do not use more current or voltage than the relay can withstand. If you have any questions in the use of the product, please contact us, we will reply within 24 hours.
JD1912 Automotive Relay 4-Pin 40A 12V SPST Car Truck Van Motorcycle Boat Relay5 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 qualitymechanical life of 10,000 cycles.
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 Must Operate Voltage 68 V DC Must Release Voltage 0.63.6 V DC Maximum Applied Voltage 15.6 V DC.
10 Pack 30/40 AMP Waterproof 5-Pin 12V Relay Switch SPDTfor 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 NC 87a, and Output NO 87.. SPDT Relay with 40A30A 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..
5 Pack - EPAuto 30/40 AMP Relay Harness Spdt 12V, 5-PIN SPDT Bosch Style
40A30A high switching capability.. Heavy-duty impact molded relay socket with 5 WIRESWhite common, Black normally closed, and Yellow normally open.. Package Include 5 relays 5 relay sockets with wires.. Safety UL Flame retardant 9 wires for the main contact..
Viair 93940 40 Amp Air Compressor Relay for 12 Volt compressor , Black
40 Amp 12v Relay with Mounting Tabs. Four 14 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.