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

2,061 Reviews Scanned

Rank No. #1
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. #2
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.
Rank No. #3
3.3V 3V 2 Channel Relay Module Optocoupler Isolation Module Relay Control Board
  • The product quality is good.
  • We are a professional Electronic Components and module manufacturer. You can search keywords in our store. I believe you can find the modules you need.
  • USA and Canada Estimated Delivery Time: 6-24 days(trackable),----- We provide Expedited Shipping service : 3-8 days.(excluding handling time).If the order amount above US $150, we will use Expedited Shipping service for free.
  • any question,please feel free to contact me.
  • We make every effort to provide customers with satisfactory service.
Rank No. #4
3.3V DC Photoelectrical Coupler Isolating -PLC Relay Module -|Input 3.3VDC| |Output 3-48VDC| -Port Diameter 6.2mm
  • Yellow LED indication, clear port mark . SIZE: 8.00×8.00×1.00cm / 3.14× 3.14× 0.39inch(L*W*H)
  • Input Voltage Range:3.3VDC±10%; Output Voltage Range: 3-48VDC; Input Current: 6mA; Max.Sustained current: 100mA. The width is only 6.2mm,which saves 60% of installation space
  • Applicable Wire: (Rigidity)0.2-2.5mm2,(Flexibility)0.2-2.5mm2,(AWG)24-14 Plug-in bridging type.Convenient DIN rail installation
  • Internal input/output polarity protection circuit.The max electrical isolation is 2.5kVrms
  • Operational frequency can reach to 300Hz.No-abrasion switch output :3-48V DC/100mA . Application areas: automation control, power distribution cabinets, railways, ships, robots, industrial controls, etc...
Rank No. #6
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
Rank No. #7
Electrical Equipments - 2 channel Trigger Voltage Relay Module PLC realy module optocoupler relay module DIN rail mounting. PLC control module - (Input Voltage 12V, Pins: Trigger Voltage 3.3V)
  • Color: Input Voltage 12V, Pins: Trigger Voltage 3.3V
  • Input Voltate (VCC): 3.3V 5V, 12V or 24V
  • Trigger Voltage (S/S):  3.3V
  • 5V, 12V or 24V
  • Output capacity: within DC 30V 10A or AC 250V 10A.
Rank No. #8
DZS Elec 5V 4 Channel Relay Optocoupler Isolation Module Red Board 3-5V High and 0-1.5V Low Level Triggered Load AC 0-250V / DC 0-30V 10A SCM IO Control
  • Work Voltage: DC 5V, Max Load for Output: AC 250V/10A, DC 30V /10A.
  • Trigger Current 5A, can be used to all kinds of Single Chip Microcomputer IO control triggering, normally open and normally close two work mode.
  • By switching the trigger level selection terminal to set 3-5V high level or 0-1.5V low level trigger controlled.
  • Adopting patch piece opto-isolator, green power light, red relay status light, strong drive capability, stable performance, clear work condition.
  • Fault tolerant designed, humanized lead wire terminals, even the control line break off, the relay still keep working.
SaleRank No. #9
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. #10
SainSmart 2-Channel Relay Module
  • 5V 2-Channel Relay interface board, and each one needs 15-20mA Driver Current
  • Equipped with high-current relay, AC250V 10A ; DC30V 10A
  • Standard interface that can be controlled directly by microcontroller (Arduino , 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic)
  • Indication LED's for Relay output status

Last update on 2021-07-08 / Affiliate links / Product Titles, Images and Descriptions from Amazon Product Advertising API

Top Rated 3.3V Relay Module to Buy Now


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(1) 3.3V Relay Module Price and Reviews

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(2) Demand

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(3) Material

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.

(4) Size

Like most products, 3.3V Relay Modules come in various sizes. Do you need a large 3.3V Relay Moduleor a small one? Think about where you will use your 3.3V Relay Module in order to determine the best size. You can also read the customer reviews on Amazon to see what others are saying about the size of the unit they purchased.

(5) Color

3.3V Relay Modules also come in a variety of colors. Do you need a particular color? You should also consider whether the color of your 3.3V Relay Module would have any effect on the efficiency of its operation.

(6) Durability

The durability of an 3.3V Relay Module will be contingent on the materials used as well as the quality of the manufacturing process. Additionally, the type of 3.3V Relay Module you purchase may affect its durability.

(7) Storage

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(8) Customer Ratings

Customer rating is one of the best criteria for choosing an 3.3V Relay Module. It is hard to know exactly how an 3.3V Relay Module will perform until you get it home and try it out.

(9) Warranty

Make sure the 3.3V Relay Module you are considering is backed by a good manufacturer’s warranty. If it isn’t, you might be better off with another ones.