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5 Best Switches Relays of 2026

Last Updated - 2026/05/18

1
Best Choice

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

DAIERTEK

DaierTek 12V Relay with Built-in Diode & 12 AWG Harness Socket 30A/40A Heavy Duty SPDT 5 Pin Relay Switch Waterproof for Automotive Car Marine Boat -8pcs

DAIERTEK

CA$34.99

More Details
Main highlights
- 【Wide Application】 - The waterproof relay 12v acts as a bridge between switches and devices, which helps to achieve controlling high rating devices by small rating switches, suitable for auto, car, truck, marine boat, etc.
- 【Waterproof】 - This 5 pin relay 12v has seal ring inside the harness socket to improve its waterproof performance, makes it much safer under moist environment use.
- 【Built-in Diode】 - This 12 volt relay has a built-in diode, which aims to consume the induced voltage that is generated by the coil while switching the status of relay, and therefore protect the electric components from being damaged by the induced voltage.
- 【30A/40A Relay】 - These 5 pin relays are rated at 12v 30A/40A (NO: 40A, NC: 30A), spdt heavy duty design relay switch.
- 【12AWG Harness】 - The wires which come with this relay socket are 12AWG/16AWG design, the 12 awg wires include red, blue and yellow wires which are the wires for high power terminals of the spdt relay; and 16 awg white and black wires for the coil terminals.
CA$34.99
2

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

JUFZQO

Replace 9038A Relay Tester, Relay Bypass Switch Kit with Amp Loop, 6 Packs

JUFZQO

CA$24.99

More Details
Main highlights
- Wide Compatibility: Compatible with most domestic, Japanese, Korean and German automotive equipment, including fuel pumps, cooling fans, window motors, headlight switches, air conditioning compressors, etc., as well as other equipment using automotive relays, replace 9038A
- Stable Performance: The housing is made of high-quality materials, dustproof and waterproof, and can operate stably under various harsh conditions. The silver contacts are highly conductive, ensuring continuous and stable operation of the power supply and improving test accuracy
- High Current Capacity: The kit supports up to 20 amps of continuous current and 30 amps of surge current (12V), ensuring reliable relay testing and control
- Efficient and Convenient: The relay tester has an independent switch function, which can be used for accurate diagnosis without starting the vehicle, and quickly detect specific circuit faults without waiting or encountering any vehicle start restrictions
- Current Monitoring Function: Equipped with an amplification loop function, it can be used with a clip-on amplifier probe/laboratory oscilloscope to monitor current and clearly identify abnormal conditions, thereby simplifying the diagnosis process
CA$24.99
3

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Valefod

[2-Pack] DC 12V Relay Module 2-Channel Relay Switch with Optocoupler Isolation High/Low Level Trigger

Valefod

CA$14.99

More Details
Main highlights
- 【Universal Interface】Equipped with screwed terminal plate and fixed bolt holes(diameter: 3.1 mm) on both sides for easy installation.
- 【Load Range】NO(Normally open) maximum load < AC 250V/10A, < DC 30V/10A. Trigger current of opto-isolator: 5mA.
- 【High Compatibility】The relay module can be controlled directly by 12V logic signals from microcontroller(8051, AVR, PIC, DSP, ARM, Pi, MSP430, TTL logic etc).
- 【Fault-tolerant Design】The relay will not operate even if the control line is disconnected.
- 【Control Devices】The 2-channel relay module uses genuine high quality DC12V relay and SMD opto-isolator supporting high/low level trigger, widely apply to control various AC/DC appliances, and other devices with large current.
CA$14.99
4
Best Value
10% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Weasch
10% Off

Weasch 9038 Relay Bypass Switch, Relay Tester, Fuel Pump Relay Bypass Switch Kit, Pack of 6 (1)

Weasch

CA$18.99

CA$20.99
(10% Off)

More Details
Main highlights
- This Relay Bypasses Switches is great for electrical diagnostics, Simply plug it into the location of the fuel pump relay and it will directly control the fuel pump circuit. Saves a ton of time
- Package: 1 x Relay Bypasses Switches (6 Pack). Please check the OEM part number and make sure your part number matches this before purchasing
- PA66 high-quality flame-retardant shell, dustproof and waterproof; silver contacts have high conductivity, ensuring continuous and stable operation of the power supply
- Operating Range Up to 20 Amps continuous, 30 Amps surge (12V)
- 9038 replaces part numbers 9036, 9037. Applicable to most Domestic, Japanese, Korean and German fuel pumps, window motors, headlight switches and other devices using automotive relays
CA$18.99
CA$20.99 (10% Off)
5

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Valefod

Valefod DC 12V Relay Module 1-Channel Relay Switch with Optocoupler Isolation High/Low Level Trigger, Pack of 10

Valefod

CA$19.99

More Details
Main highlights
- 【Universal Interface】Equipped with screwed terminal plate and fixed bolt holes(diameter: 3.1 mm) on both sides for easy installation.
- 【Load Range】NO(Normally open) maximum load < AC 250V/10A, < DC 30V/10A. Trigger current of opto-isolator: 5mA.
- 【High Compatibility】The relay module can be controlled directly by 12V logic signals from microcontroller(8051, AVR, PIC, DSP, ARM, Raspberry Pi, MSP430, TTL logic etc).
- 【Fault-tolerant Design】The relay will not operate even if the control line is disconnected.
- 【Control Devices】The 1-channel relay module uses genuine high quality DC12V relay and SMD opto-isolator supporting high/low level trigger, widely apply to control various AC/DC appliances, and other devices with large current.
CA$19.99

5 Best Switches Relays of 2026

DaierTek 12V Relay with Built-in Diode & 12 AWG Harness Socket 30A/40A Heavy Duty SPDT 5 Pin Relay Switch Waterproof for Automotive Car Marine Boat -8pcs

Replace 9038A Relay Tester, Relay Bypass Switch Kit with Amp Loop, 6 Packs

[2-Pack] DC 12V Relay Module 2-Channel Relay Switch with Optocoupler Isolation High/Low Level Trigger

Weasch 9038 Relay Bypass Switch, Relay Tester, Fuel Pump Relay Bypass Switch Kit, Pack of 6 (1)

Valefod DC 12V Relay Module 1-Channel Relay Switch with Optocoupler Isolation High/Low Level Trigger, Pack of 10

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