Best Switches Relays of 2025

Last updated on 31/12/2025
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1
9038A Fuel Pump Relay Bypass Master Switch Kit with Amp Loop, 6PCS Relay Tester Diagnostic Scan Switch Kit
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9038A Fuel Pump Relay Bypass Master Switch Kit with Amp Loop, 6PCS Relay Tester Diagnostic Scan Switch Kit

MICTUNING
Why we love it
  • Enhanced control over components.
  • Reliable performance for durability.
  • Easy installation with plug-and-play.
Main Highlights
  • Enhanced Control over Vital Automotive Components: The 9038A Relay Bypass Switch Kit allows for independent control of essential components like fuel pumps, window motors, and cooling fans, simplifying fuel injection testing and enabling precise monitoring for efficient diagnostics.
  • Reliable Performance: Designed for durability and functionality, this switch kit ensures powerful performance by controlling all 12V DC motors with ease. Its independent relay circuit control guarantees reliable operation for a range of automotive components.
  • Advanced Functionality with Amp Loop Feature: The 9038A Relay Switch Kit comes equipped with an Amp Loop feature, enabling seamless integration with clamp-on Amp Probes and Lab Scopes for accurate monitoring of current and amperage ratings within the circuit, enhancing capabilities.
  • Compatibility Vehicles: This relay bypass switch kit is compatible with Audi 2004-2006, compatible with BMW 1995-2006, and compatible with Volkswagen 1999-2005 models, making it versatile for use with various automotive 12V DC motors.
  • Easy Installation and Hassle-free Setup: With a plug-and-play design, this switch kit offers effortless installation by simply inserting it into the fuel pump relay position. Gain direct control over the fuel pump circuit for quick and efficient electrical diagnosis, especially when used in conjunction with clamp-on Amp Probes and Lab Scopes.
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9.8
Exceptional
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9.8
Exceptional
MICTUNING

9038A Fuel Pump Relay Bypass Master Switch Kit with Amp Loop, 6PCS Relay Tester Diagnostic Scan Switch Kit

Why we love it
  • Enhanced control over components.
  • Reliable performance for durability.
  • Easy installation with plug-and-play.
Main Highlights
  • Enhanced Control over Vital Automotive Components: The 9038A Relay Bypass Switch Kit allows for independent control of essential components like fuel pumps, window motors, and cooling fans, simplifying fuel injection testing and enabling precise monitoring for efficient diagnostics.
  • Reliable Performance: Designed for durability and functionality, this switch kit ensures powerful performance by controlling all 12V DC motors with ease. Its independent relay circuit control guarantees reliable operation for a range of automotive components.
  • Advanced Functionality with Amp Loop Feature: The 9038A Relay Switch Kit comes equipped with an Amp Loop feature, enabling seamless integration with clamp-on Amp Probes and Lab Scopes for accurate monitoring of current and amperage ratings within the circuit, enhancing capabilities.
  • Compatibility Vehicles: This relay bypass switch kit is compatible with Audi 2004-2006, compatible with BMW 1995-2006, and compatible with Volkswagen 1999-2005 models, making it versatile for use with various automotive 12V DC motors.
  • Easy Installation and Hassle-free Setup: With a plug-and-play design, this switch kit offers effortless installation by simply inserting it into the fuel pump relay position. Gain direct control over the fuel pump circuit for quick and efficient electrical diagnosis, especially when used in conjunction with clamp-on Amp Probes and Lab Scopes.
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Value for Money
2
KETOTEK Smart Relay Switch Module 16A Compatible with Alexa, WiFi Light Switch Module 220V for Home Automation, Smart Life/Tuya App Control, Neutral Wire Required
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KETOTEK Smart Relay Switch Module 16A Compatible with Alexa, WiFi Light Switch Module 220V for Home Automation, Smart Life/Tuya App Control, Neutral Wire Required

KETOTEK
Why we love it
  • Smart home integration made easy.
  • Compact design fits everywhere.
  • Control everything from your phone.
Main Highlights
  • KETOTEK smart switch is a WiFi enabled switch which can switch your home appliances from traditional to smart, and integrate them into your home automation. With KETOTEK smart switch, you can automate and remotely control your lights, fans, outlets, switches, or other electronic devices. Power supply: 100-240V AC 50/60hz, Load: max 16A/3500W @240V AC, Max 300W for LED lamp.
  • Small size. 39mm*39mm*18mm, the KETOTEK smart switch is extremely small and fits perfectly in tight spaces. It can be easily installed behind existing light switches, sockets or in narrow junction boxes without taking up much space. This wifi relay switch comes with a mounting clip, you can mount it on DIN rail or screw it to the wall.
  • Smart control. The Smart Life/Tuya app allows you to turn on/off the device remotely, schedule on/off times and create scenes/automations, offering a high degree of customisation. Compatibility with Alexa and Google Assistant allows you to control lights and other devices via voice commands, making home automation even more convenient and accessible. 2.4G WiFi required, 5G WiFi is not available.
  • Group control & device share. Create a group to simultaneously control your KETOTEK smart relay switches, and you can turn them on or off with a simple tap or create schedules to turn them on/off at preset time in the App. You can also share these smart switches to your family to control them together.
  • Neutral wire required. This smart relay switch can be used universally for most application. It can connect to the load directly without external switch (such as lights, sockets), or connect to load and 1-way external switch or 2-way external switch. You can DIY as you want. Package: 1*smart switch, 1*mounting clip, 1*manual.
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9.8
Exceptional
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9.8
Exceptional
KETOTEK

KETOTEK Smart Relay Switch Module 16A Compatible with Alexa, WiFi Light Switch Module 220V for Home Automation, Smart Life/Tuya App Control, Neutral Wire Required

Why we love it
  • Smart home integration made easy.
  • Compact design fits everywhere.
  • Control everything from your phone.
Main Highlights
  • KETOTEK smart switch is a WiFi enabled switch which can switch your home appliances from traditional to smart, and integrate them into your home automation. With KETOTEK smart switch, you can automate and remotely control your lights, fans, outlets, switches, or other electronic devices. Power supply: 100-240V AC 50/60hz, Load: max 16A/3500W @240V AC, Max 300W for LED lamp.
  • Small size. 39mm*39mm*18mm, the KETOTEK smart switch is extremely small and fits perfectly in tight spaces. It can be easily installed behind existing light switches, sockets or in narrow junction boxes without taking up much space. This wifi relay switch comes with a mounting clip, you can mount it on DIN rail or screw it to the wall.
  • Smart control. The Smart Life/Tuya app allows you to turn on/off the device remotely, schedule on/off times and create scenes/automations, offering a high degree of customisation. Compatibility with Alexa and Google Assistant allows you to control lights and other devices via voice commands, making home automation even more convenient and accessible. 2.4G WiFi required, 5G WiFi is not available.
  • Group control & device share. Create a group to simultaneously control your KETOTEK smart relay switches, and you can turn them on or off with a simple tap or create schedules to turn them on/off at preset time in the App. You can also share these smart switches to your family to control them together.
  • Neutral wire required. This smart relay switch can be used universally for most application. It can connect to the load directly without external switch (such as lights, sockets), or connect to load and 1-way external switch or 2-way external switch. You can DIY as you want. Package: 1*smart switch, 1*mounting clip, 1*manual.
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3
JUUDDENPARTS 6Pcs 9038 Relay Bypass Switch Kit, Tester Diagnostic Scan Tool Bypass Master Kit, Replace 9036 9037, Black Fuel Pump Relay Bypass Master Switch Kit
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JUUDDENPARTS 6Pcs 9038 Relay Bypass Switch Kit, Tester Diagnostic Scan Tool Bypass Master Kit, Replace 9036 9037, Black Fuel Pump Relay Bypass Master Switch Kit

JUUDDENPARTS
Why we love it
  • Independent control of relay circuits.
  • Durable, dustproof, and waterproof design.
  • Easy plug-and-play installation.
Main Highlights
  • Replace Part Number: 9036, 9037
  • Fitment: Replacement for fuel pumps, window motors, headlight switches and other devices using automotive relays
  • Independent Control Function: This switch kit allows you to control relay circuits independently of the ignition switch system, ensuring the reliable operation of various automotive components and improving the control accuracy of critical components
  • Endurance Property: Made of sturdy materials with dustproof and waterproof characteristics, the silver contacts are conductive to ensure a continuous and stable power supply with good endurance
  • Easy Installation: This relay bypass switch kit is a plug-and-play design that is easy to install, simply plug it into the fuel pump relay position for quick control of the fuel pump circuit and easy electrical diagnostics
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9.7
Exceptional
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9.7
Exceptional
JUUDDENPARTS

JUUDDENPARTS 6Pcs 9038 Relay Bypass Switch Kit, Tester Diagnostic Scan Tool Bypass Master Kit, Replace 9036 9037, Black Fuel Pump Relay Bypass Master Switch Kit

Why we love it
  • Independent control of relay circuits.
  • Durable, dustproof, and waterproof design.
  • Easy plug-and-play installation.
Main Highlights
  • Replace Part Number: 9036, 9037
  • Fitment: Replacement for fuel pumps, window motors, headlight switches and other devices using automotive relays
  • Independent Control Function: This switch kit allows you to control relay circuits independently of the ignition switch system, ensuring the reliable operation of various automotive components and improving the control accuracy of critical components
  • Endurance Property: Made of sturdy materials with dustproof and waterproof characteristics, the silver contacts are conductive to ensure a continuous and stable power supply with good endurance
  • Easy Installation: This relay bypass switch kit is a plug-and-play design that is easy to install, simply plug it into the fuel pump relay position for quick control of the fuel pump circuit and easy electrical diagnostics
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4
MICTUNING 12V Fuse Relay Switch Harness Set - 30A ATO/ATC Blade Fuse, 5-Pin SPST Automotive Electrical Relays with Heavy Duty 14 AWG Wires - 6 Pack
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MICTUNING 12V Fuse Relay Switch Harness Set - 30A ATO/ATC Blade Fuse, 5-Pin SPST Automotive Electrical Relays with Heavy Duty 14 AWG Wires - 6 Pack

MICTUNING
Why we love it
  • Upgraded version saves space.
  • Easy color-coded wiring.
  • Neat mounting design feature.
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 14AWG wires for main contact
  • ✔Easy Wiring - The relay sockets come with color-labeled wires for loads/accessories convenient wiring. Black - Ground (85), Red - VDC (30), White - Trigger (86), Blue - Output N/O (87)
  • ✔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 (Max@14V DC) and 30A High Switching Capability. Bosch style 5-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
Show More
9.5
Superb
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9.5
Superb
MICTUNING

MICTUNING 12V Fuse Relay Switch Harness Set - 30A ATO/ATC Blade Fuse, 5-Pin SPST Automotive Electrical Relays with Heavy Duty 14 AWG Wires - 6 Pack

Why we love it
  • Upgraded version saves space.
  • Easy color-coded wiring.
  • Neat mounting design feature.
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 14AWG wires for main contact
  • ✔Easy Wiring - The relay sockets come with color-labeled wires for loads/accessories convenient wiring. Black - Ground (85), Red - VDC (30), White - Trigger (86), Blue - Output N/O (87)
  • ✔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 (Max@14V DC) and 30A High Switching Capability. Bosch style 5-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
Show More
5
Ollanoos 10 Pack JD1914 12V 40A 5 Pin SPDT Electrical Relays, Starter Switch Relays for Automotive Truck Motorcycle Boat Fan
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Ollanoos 10 Pack JD1914 12V 40A 5 Pin SPDT Electrical Relays, Starter Switch Relays for Automotive Truck Motorcycle Boat Fan

Ollanoos
Why we love it
  • High current switching capability.
  • Versatile for various applications.
  • Easy installation and clear labeling.
Main Highlights
  • High Switching Capability: High current switching capability of 30A and 40A for a wide range of high load applications, ensuring stable and reliable current transfer
  • Versatile Compatibility: Suitable for all automobiles and equipment equipped with 12V DC power supply, flexible compatibility with various vehicle models to meet different needs
  • Simple Installation Design: 5-pin SPDT design with simple wiring for quick and easy installation and replacement, saving time
  • Widely used: Suitable for automotive circuits, audio systems, security systems and other occasions, with a wide range of application potential to meet the needs of different projects
  • Clear Identification: Each pin is clearly labeled for easy identification and connection, reducing the risk of wiring errors
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9.4
Superb
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9.4
Superb
Ollanoos

Ollanoos 10 Pack JD1914 12V 40A 5 Pin SPDT Electrical Relays, Starter Switch Relays for Automotive Truck Motorcycle Boat Fan

Why we love it
  • High current switching capability.
  • Versatile for various applications.
  • Easy installation and clear labeling.
Main Highlights
  • High Switching Capability: High current switching capability of 30A and 40A for a wide range of high load applications, ensuring stable and reliable current transfer
  • Versatile Compatibility: Suitable for all automobiles and equipment equipped with 12V DC power supply, flexible compatibility with various vehicle models to meet different needs
  • Simple Installation Design: 5-pin SPDT design with simple wiring for quick and easy installation and replacement, saving time
  • Widely used: Suitable for automotive circuits, audio systems, security systems and other occasions, with a wide range of application potential to meet the needs of different projects
  • Clear Identification: Each pin is clearly labeled for easy identification and connection, reducing the risk of wiring errors
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6
Shelly 1 Mini Gen3, WiFi Smart Switch Relay, 1 Channel, 8A, Home Automation, Dry Contacts, Garage Door Remote Control, Compact Size, Alexa and Google Home, iOS & Android App, No Hub Required
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Shelly 1 Mini Gen3, WiFi Smart Switch Relay, 1 Channel, 8A, Home Automation, Dry Contacts, Garage Door Remote Control, Compact Size, Alexa and Google Home, iOS & Android App, No Hub Required

Shelly
Why we love it
  • Easy garage door control.
  • Weather-driven irrigation automation.
  • Reliable remote device management.
Main Highlights
  • 𝟭-𝗖𝗵𝗮𝗻𝗻𝗲𝗹 𝗦𝗺𝗮𝗿𝘁 𝗖𝗼𝗻𝘁𝗿𝗼𝗹: Rated up to 8A at 240V AC or 5A at 30V DC; fits neatly behind wall switches or inside junction boxes
  • 𝗗𝗿𝘆 𝗖𝗼𝗻𝘁𝗮𝗰𝘁𝘀: Use potential-free outputs to control garage doors, gates, boilers, or low-voltage circuits
  • 𝗔𝗽𝗽 & 𝗩𝗼𝗶𝗰𝗲 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻: Control from anywhere using the Shelly Smart Control app or voice assistants like Alexa, Google Home, or SmartThings - 𝗻𝗼 𝗵𝘂𝗯 𝗿𝗲𝗾𝘂𝗶𝗿𝗲𝗱
  • 𝗦𝗰𝗵𝗲𝗱𝘂𝗹𝗶𝗻𝗴 & 𝗧𝗶𝗺𝗲𝗿𝘀: Set up timers and personalized schedules per channel or create scenes for full-home automation
  • 𝗪𝗶-𝗙𝗶 𝗢𝗽𝗲𝗿𝗮𝘁𝗲𝗱 + 𝗤𝘂𝗶𝗰𝗸 𝗦𝗲𝘁𝘂𝗽: Uses 2.4 GHz Wi-Fi for seamless smart home control; Bluetooth included for simplified connection
  • 𝗪𝗵𝗮𝘁’𝘀 𝗡𝗲𝘄 𝗶𝗻 𝗚𝗲𝗻𝟯: Gen3 offers more memory (8MB), faster performance, and future Matter support for enhanced automation
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9.2
Superb
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9.2
Superb
Shelly

Shelly 1 Mini Gen3, WiFi Smart Switch Relay, 1 Channel, 8A, Home Automation, Dry Contacts, Garage Door Remote Control, Compact Size, Alexa and Google Home, iOS & Android App, No Hub Required

Why we love it
  • Easy garage door control.
  • Weather-driven irrigation automation.
  • Reliable remote device management.
Main Highlights
  • 𝟭-𝗖𝗵𝗮𝗻𝗻𝗲𝗹 𝗦𝗺𝗮𝗿𝘁 𝗖𝗼𝗻𝘁𝗿𝗼𝗹: Rated up to 8A at 240V AC or 5A at 30V DC; fits neatly behind wall switches or inside junction boxes
  • 𝗗𝗿𝘆 𝗖𝗼𝗻𝘁𝗮𝗰𝘁𝘀: Use potential-free outputs to control garage doors, gates, boilers, or low-voltage circuits
  • 𝗔𝗽𝗽 & 𝗩𝗼𝗶𝗰𝗲 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻: Control from anywhere using the Shelly Smart Control app or voice assistants like Alexa, Google Home, or SmartThings - 𝗻𝗼 𝗵𝘂𝗯 𝗿𝗲𝗾𝘂𝗶𝗿𝗲𝗱
  • 𝗦𝗰𝗵𝗲𝗱𝘂𝗹𝗶𝗻𝗴 & 𝗧𝗶𝗺𝗲𝗿𝘀: Set up timers and personalized schedules per channel or create scenes for full-home automation
  • 𝗪𝗶-𝗙𝗶 𝗢𝗽𝗲𝗿𝗮𝘁𝗲𝗱 + 𝗤𝘂𝗶𝗰𝗸 𝗦𝗲𝘁𝘂𝗽: Uses 2.4 GHz Wi-Fi for seamless smart home control; Bluetooth included for simplified connection
  • 𝗪𝗵𝗮𝘁’𝘀 𝗡𝗲𝘄 𝗶𝗻 𝗚𝗲𝗻𝟯: Gen3 offers more memory (8MB), faster performance, and future Matter support for enhanced automation
Show More
7
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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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
4% Off
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. Bosch style 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
Show More
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

4% Off
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. Bosch style 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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8
Gebildet 2pcs 40/30 Amp Waterproof Relay Switch 12AWG Harness Set with Built-in Diode- 12V DC 4-Pin SPST Automotive Relays Hot Wires
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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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8.9
Excellent
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8.9
Excellent
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

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.
Show More
9
12V Fuse Relay Switch Harness Set with 30A Blade Fuse – 4-Pin SPST Automotive Relays with Built-in Fuse Holder, Heavy Duty 12 AWG Wires, Interlocking Mount
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12V Fuse Relay Switch Harness Set with 30A Blade Fuse – 4-Pin SPST Automotive Relays with Built-in Fuse Holder, Heavy Duty 12 AWG Wires, Interlocking Mount

talNite
Why we love it
  • Space-saving design simplifies installation.
  • Color-coded wiring for easy setup.
  • Durable relays for versatile applications.
Main Highlights
  • UPGRADED SPACE-SAVING DESIGN: Each automotive relay in this relay holder set comes with a built-in fuse socket and 30A ATO/ATC blade fuse, eliminating the need for a separate fuse holder. This 4 pin relay 12v 30a efficient design saves space and simplifies installation, making it an ideal solution for vehicle electrical systems.
  • EASY COLOR-CODED WIRING: Wiring your relays is effortless with the included color-labeled wires: Black for ground (85), Red for power (30), White for trigger (86), and Blue for output (87). The heavy-duty 12 AWG wires ensure a reliable connection for high-current loads and accessories.
  • INTERLOCKING MOUNTING SYSTEM: Designed for neat and organized installation, the 4 pin relay 12v relays feature an interlocking male-female slot system on each socket edge. This 12v relay allows you to easily connect and secure multiple relays together, providing a clean and streamlined setup in any automotive project.
  • HIGH-PERFORMANCE RELAYS: These 4-pin SPST Bosch-style relays offer excellent switching capability with 30A and up to 14V DC. Each relay includes a durable metal mounting bracket for quick and easy installation, making them ideal for controlling a variety of automotive devices.
  • WIDE APPLICATIONS: 12V waterproof relay suitable for a wide range of automotive applications, these relays are perfect for controlling car lights, fog lamps, starters, fans, speakers, wipers, traction control systems, and more. The 12v 30a relay 4 pin heavy-duty design ensures long-lasting performance even in demanding conditions.
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8.7
Excellent
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8.7
Excellent
talNite

12V Fuse Relay Switch Harness Set with 30A Blade Fuse – 4-Pin SPST Automotive Relays with Built-in Fuse Holder, Heavy Duty 12 AWG Wires, Interlocking Mount

Why we love it
  • Space-saving design simplifies installation.
  • Color-coded wiring for easy setup.
  • Durable relays for versatile applications.
Main Highlights
  • UPGRADED SPACE-SAVING DESIGN: Each automotive relay in this relay holder set comes with a built-in fuse socket and 30A ATO/ATC blade fuse, eliminating the need for a separate fuse holder. This 4 pin relay 12v 30a efficient design saves space and simplifies installation, making it an ideal solution for vehicle electrical systems.
  • EASY COLOR-CODED WIRING: Wiring your relays is effortless with the included color-labeled wires: Black for ground (85), Red for power (30), White for trigger (86), and Blue for output (87). The heavy-duty 12 AWG wires ensure a reliable connection for high-current loads and accessories.
  • INTERLOCKING MOUNTING SYSTEM: Designed for neat and organized installation, the 4 pin relay 12v relays feature an interlocking male-female slot system on each socket edge. This 12v relay allows you to easily connect and secure multiple relays together, providing a clean and streamlined setup in any automotive project.
  • HIGH-PERFORMANCE RELAYS: These 4-pin SPST Bosch-style relays offer excellent switching capability with 30A and up to 14V DC. Each relay includes a durable metal mounting bracket for quick and easy installation, making them ideal for controlling a variety of automotive devices.
  • WIDE APPLICATIONS: 12V waterproof relay suitable for a wide range of automotive applications, these relays are perfect for controlling car lights, fog lamps, starters, fans, speakers, wipers, traction control systems, and more. The 12v 30a relay 4 pin heavy-duty design ensures long-lasting performance even in demanding conditions.
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10
Ehdis 2 pcs Car Relay 12v 40 APM 4 Pin Relay Kit Spst Model No.: JD2912-1H-12VDC 40A 14VDC, Auto Switches & Starters
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Ehdis 2 pcs Car Relay 12v 40 APM 4 Pin Relay Kit Spst Model No.: JD2912-1H-12VDC 40A 14VDC, Auto Switches & Starters

Ehdis
Why we love it
  • Heavy duty 40A capacity.
  • Versatile relay harness options.
  • Long mechanical life span.
Main Highlights
  • Brand new heavy duty 4-prongs SPST relays
  • 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
  • Mechanical life of 10,000+ cycles
Show More
8.7
Excellent
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8.7
Excellent
Ehdis

Ehdis 2 pcs Car Relay 12v 40 APM 4 Pin Relay Kit Spst Model No.: JD2912-1H-12VDC 40A 14VDC, Auto Switches & Starters

Why we love it
  • Heavy duty 40A capacity.
  • Versatile relay harness options.
  • Long mechanical life span.
Main Highlights
  • Brand new heavy duty 4-prongs SPST relays
  • 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
  • Mechanical life of 10,000+ cycles
Show More

We scanned 213 products

We reviewed these offers relevant to the Switches Relays within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like MICTUNING, KETOTEK, JUUDDENPARTS, Ollanoos, Shelly, Gebildet, talNite, Ehdis, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.
For the best Switches Relays in the market, we considered we took a deep dive into 1066 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that: