We’ve spent hundreds of hours researching and comparing 3.3V Relay Module of all specifications to find the best one for any need (or budget). Here are the results.

The Best 3.3V Relay Module of 2020 – Top Rated & Reviewed

2,886 Reviews Scanned

Rank No. #2
3v Relay Board Power Switch Relay Module 1 Channel Optocoupler - Opto Isolation High Level Trigger for IOT ESP8266 Development Board 6Pack
  • 【 3V/3.3V power relay module】- This Relay Board provides a single relay that can be controlled by any 3V/3.3V digital input from your microcontroller IO.
  • 【Main Specification】- The 3v Relay 1 Channel power switch module compatible with 10A 250VAC and 10A 30VDC load;4pcs * 2.5 mm Fixed Bolt Hole.
  • 【Adopted Optocoupler Isolation】- 3V/3.3V power relay module supports photocoupler isolation control and dual power supply input ensure high anti-interference ability. Fast response time less than 20ms and long life time up to 100,000 times snap action with diode freewheel protection.
  • 【Jumper Caps】You can select whether the relay and the signal use the same power supply or not by removing the jumper caps on the pins. It is better to share the same power supply, because that is more convenient for using.
  • 【Wide Application】- These 3v relay board works well with ARM /PIC /AVR /MCU/Raspberry/CNC machine/ PS4/3.3V /NodeMCU/ ESP8266 module etc.
SaleRank No. #3
ICStation 1CH DC 3V 3.3V Relay Power Switch Module with Optocoupler High Level Trigger for ESP8266 Development Board Arduino(Pack of 2)
  • ICStation 1CH 3V 3.3V relay power switch module with optocoupler high level trigger for ESP8266 development board. 【Optocoupler Isolation】it can control high current load via low current, and replace mechanical switch.
  • Use the classical and beautiful black PCB and metal components, looks cool and pleasure to the eyes, which will show your whole DIY project superior. 2pcs with the independent anti-static packing. Size: 50x26x17mm/1.97x1.02x0.67inch, Voltage: 3V-3.3V, Current: <200mA (operating); <5mA (trigger). Operating Temperature: -25~85 Celsius.
  • 【Load Capacity】7A, 240V AC; 10A 120V AC; 10A 28V DC. Please do not go beyond the voltage or current, or it will burn the relay contact. Load wire is fenestrate processed, if it is tin plated, it can bear high current (please pay attention to the insulation).
  • 【Interface】 Input: VCC, GND, IN; Load Port: Normal Close, Common, Normal Open. 【Wiring】(1) VCC connects DC 3.3V positive; (2) GND connects DC 3.3V negative; (3) IN connects main control equipment input port, such as MCU, sensor output port (0 and 1, you can adjust via the switch on your own); (4) Please note that the power cannot be reversely connected, or it will burn the module.
  • Connect the power; when push the switch to L, IN port will input low level, and relay will operate, S lamp will be on. If COM and NO are connected; when input high level, the relay will release, and S lamp will be off. If COM and NO are disconnected, it becomes connection between COM and NC. If push the switch to H, and not use the relay, NC and COM are connected.
Rank No. #4
Onyehn 1 Channel DC 3V Relay High Level Driver Module Optocoupler Relay Module Isolated Drive Control Board for Arduino (Pack of 5)
  • 1 channel 3V/3.3V power relay mdoule support photocoupler isolation control;Support dual power supply input ensure high anti-iinterference ability
  • Fast response time less than 20ms and longlife time up to 100,000 times snap action
  • On-board signal output indicator, wire terminal and installing holescompatible with 10A 250VAC and 10A 30VDC load
  • Module Size: 70mmX17mmX20mm / 2.76X0.70X0.79 inch (L*W*H)
  • Relay Module: SRD-DC03V-SL-C;Channel: 1 channel;Working Voltage: DC 3-3.3V;Compatible Load: 10A 250VAC / 10A 30VDC;Single Socket Length: 7.5mm
SaleRank No. #5
SainSmart 8-Channel Relay Module
  • 5V 8-Channel Relay interface board, and each one needs 15-20mA Driver Current
  • Equipped with high-current relay, AC250V 10A ; DC30V 11A
  • Standard interface that can be controlled directly by microcontroller (Arduino , 8051, AVR, PIC, DSP, ARM, ARM, MSP432, TTL logic)
  • Indication LED's for Relay output status
Rank No. #6
Flymmy 3V 1 Channel Relay Power Switch Module with Optocoupler Opto Isolation High Level Trigger for IOT ESP8266 Development Board 6 Pack
  • 【Opto-isolator Control】Our 3v 1 channel relay module supports photocoupler isolation control, has the output signal indicator,the signal input port can connect SCM IO port, high level signal drive. Strong driving ability, stable performance.
  • 【Dual Power Option Design】Our 3V/3.3V power relay module use double power selection design that has strong anti-interference ability and high photoelectric isolation protection reliability.
  • 【Diode Continuous Flow Protection】Relay module with diode continuous flow protection, response time is less than 20 milliseconds,long life of relay can be absorbed 100,000 times continuously.
  • 【30VDC 250VAC Load】Equiped with high-current relay, AC250V 10A ; DC30V 10A, each relay has normally open and normally closed contact. Can be selected by jumper relay and TTL or ground.
  • 【Safer & More Solid】 The external connection adopts rotary compression terminal to make the connection stronger.
Rank No. #7
KeeYees 2pcs 1 Channel 3V High Level Trigger Relay Switch Control Module with Optocoupler Optical Isolation for ESP8266 Development Board + 3pcs 20CM 10Pin Female Male Jumper Wires
  • The relay can directly control a variety of equipment and loads, which meets international safety standards, and also has power and relay indicators.
  • This relay can be used not only as a microcontroller development board module, but also as a home appliance controller.
  • No need to buy the Jumper Wires extra, this set contains 20cm 10Pin female to female, female to male, male to male Dupont Jumper Wires, with which you can easier to complete the project.
SaleRank No. #8
SainSmart 16-Channel Relay Module
  • 12V 16-Channel Relay interface board, and each one needs 15-20mA Driver Current
  • Equipped with high-current relay, AC250V 10A ; DC30V 12A
  • Standard interface that can be controlled directly by microcontroller (Arduino , 8051, AVR, PIC, DSP, ARM, ARM, MSP433, TTL logic)
  • Indication LED's for Relay output status
Rank No. #9
HiLetgo 2pcs 5V One Channel Relay Module Relay Switch with OPTO Isolation High Low Level Trigger
  • The module uses genuine quality relay, normally open interfaces , Maximum load: AC 250V/10A, DC 30V/10A.
  • Using SMD optocoupler isolation, strong driving capability, stable performance; trigger current 5mA.
  • Fault-tolerant design, even if the control line is broken, the relay will not move.
  • The interface design of human nature, all interfaces are available through a direct connection terminal leads, very convenient.
  • The Module can be set by jumper high or low trigger.
Rank No. #10
Eagles 5pcs 1 Channel 3V Relay Module with Optocoupler for ESP8266 Module,3v Logic Level Boards,Raspberry Pi 3.3v Application
  • 1. 3V 1-Channel Relay interface board support photocoupler isolation control,has the output signal indicator,the signal input port can connect SCM IO port, high level signal drive
  • 2. Support dual power supply input ensure high anti-interference ability,high reliability of photoelectric isolation protection
  • 3. With diode continuous flow protection,response time is less than 20 milliseconds,long life of relay can be absorbed 100,000 times continuously
  • 4. The external connection uses the rotary crimping terminal, causes the wiring to be more solid.
  • 5. Equiped with high-current relay, AC250V 10A ; DC30V 10A,each relay has normally open and normally closed contact. Can be selected by jumper relay and TTL or ground.

Last update on 2020-11-10 / Affiliate links / Product Titles, Images and Descriptions from Amazon Product Advertising API

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3.3V Relay Module materials differ from manufacturer to manufacturer. Consider where and how you will be using your 3.3V Relay Module to determine if one material would be better than another.

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(9) Warranty

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