The Best 3.3V Relay Board of 2025 – Reviews & Buying Guide
After hours researching and comparing all models on the market, we find out the Best 3.3V Relay Board of 2025. Check our ranking below.
2,602 Reviews Scanned
Rank No. #1
Teyleten Robot DC 1 Channel Optocoupler 3V/3.3V Relay High Level Driver Module Isolated Drive Control Board 3V/3.3V Relay Module for Arduino (Pack of 5)
- Original Songle Relay
- 30VDC 250VAC Load：The power switch is compatible with 10A 250VAC and 10A 30VDC load.
- Optocoupler Isolator:3V/3.3V power relay module supports photocoupler isolation control.
Rank No. #2
JESSINIE 5Pcs 1 Channel DC 3V/3.3V Power Relay Module 3V Relay Switch Module with Optocoupler Relay Module Isolated Drive Control Board 10A 250VAC 10A 30VDC Control Development Board
- Indicator with output signal
- The signal input port can be connected to the IO port of the single chip microcomputer, and the high-level signal is driven
- Dual power supply selection design has strong anti-interference ability and high reliability of photoelectric isolation protection
- Onboard 3V,10A/250VAC; 10A/30V DC relay, which can be continuously closed for 100,000 times, with diode laxative protection, short response time
- The external connection adopts rotary crimping terminal to make the connection firmer, With fixed mounting holes for easy installation
Rank No. #3
8-Channel I2C IIC Relay Board XL9535, USB-C, Dual Power 3.3V/5V, SPDT 10A EMR, DIN-Rail Ready, Multi-Board I2C Expansion Expandable, Compatible with Arduino ESP32 Raspberry Pi ESPHome & Home Assistant
- 8 I2C-Controlled EMR Relays (10A Rated) – Features eight SPDT mechanical relays driven by the XL9535 GPIO expander. Each channel switches up to 10A @ 250VAC or 30VDC—ideal for lighting, pumps, motors and AC/DC loads.
- Dual Power Mode for 3.3V & 5V MCUs – Use single-5V mode for Arduino, or dual-power mode for ESP32/ESP8266/Raspberry Pi (3.3V for logic, 5V for coils). Ensures safe I²C voltage levels and strong relay performance. Type C / USB-C Port available to power to board for your convenience
- Noise-Reduced Stable Operation – Separate logic and relay power rails (VIN/GND1 vs. 5V/GND2) prevent voltage dips, MCU resets, and I²C communication errors—critical in smart home and industrial systems.
- Multi-Board I2C Expansion (Up to 64 Relays) – DIP switches allow selecting 8 unique I²C addresses (0x20–0x27). Daisy-chain up to 8 boards on one SDA/SCL bus, enabling 64 individually addressable relay channels.
- DIN-Rail Friendly & Maker Ready – Includes USB-C power input, high-quality screw terminals, clear labeling and a compact 150×72mm design. Fully compatible with Arduino, ESP32, ESP8266, Raspberry Pi, Home Assistant and ESPHome. Example code available on GitHub.
Rank No. #4
DC 5V 3 Channel Relay Module Relay Expansion Board with Optocoupler Insulation Compatible 3.3V 5V Signal for Arduino
- DC 5V 3 Channel Relay Module Relay Expansion Board with Optocoupler Insulation for Arduino
- 3-Channel Relay Module With Optocoupler Isolation Compatible 3.3V 5V Signal
- Size:63*42*20mm
- Trigger Level:3V-7V trigger,Trigger Current:5mA
- Control Voltage:AC 0-250V or DC 0-30V,Control Current:0-7A
Rank No. #5
MTDELE 6Pcs DC 3.3V Relay Module 1 Channel Optocoupler Module 3V/3.3V Relay Isolated Drive Control Board Compatible with for Arduino
- 3.3V Relay Module：Compatible with for Power Switching LED Lights Small Motors Circuit Isolation Signal Conversion
- Size：70*17*20mm
- Voltage: DC 3V/3.3V
- Load：10A 250VAC；10A 30VDC
- Commodities include：6Pcs 3V/3.3V Relay Module；1Pcs Screwdriver
Rank No. #6
AEDIKO 6pcs 1 Channel Relay Module DC 3V/3.3V High Level Driver Optocoupler Module Isolated Drive Control Board
- 3V Relay Module: Working Voltage: DC 3-3.3V; Working Current: 65mA; Trigger Current: 3mA;Load: 10A 250VAC / 10A 30VDC;Load Current: 10A max
- Optocoupler Isolator: 3V/3.3V Power Relay Module Supports Photocoupler Isolation Control
- High Level Trigger: The Relay Module is Triggered by High Level Signal, Which Can Be Input From Microcontroller IO
- Jumper Caps: By Removing the Jumper Caps on the Pins,You can Select Whether the Relay and the Signal Share the Same Power Supply or Not,But We Are Recommended to Share the Same Power Supply
- Wide Application: These 3V Relay Power Switch Module Works Well With ARM /PIC /AVR /MCU/CNC Machine/ PS4 etc.
Rank No. #7
KRIDA Electronics 8 Channel I2C Interface Relay Module for Arduino, Raspberry PI, Home Assistant YAML, ESP32, 10A Peak LED Indicator, SPDT Switch Contacts, AC DC Voltage Control, I2C I/O pin Expander
- LEDs indicators for each electromagnetic relay channel. Relays with SPDT switch contacts: Normally Open, Common, Normally Closed.
- Up to 8 boards can be connected to I2C bus line. The module contains an PCF8574 or PCF8574A chip. Working temperature range - 25 C ~ + 80 C
- Comes with different slave address 0x27 or 0x3F, depends on the batch. Relay expected life Mechanical - 10,000,000 operations min. Relay expected life Electrical - 100,000 operations min. at rated load
- Relay dielectric strength 750 VAC, 50/60Hz between contact. Maximum current per relay – 10A peak. Maximum current @5.0V – 700mA. Operation DC voltage – 3.3V and 5.0V
- AC controlling voltage range 100…240V AC, AC voltage frequency range 50…60Hz. compatible with plastic din rail holder, size 100mm
Rank No. #8
12Pcs 1 Channel Optocoupler Relay High Level Driver Module Optocoupler Relay Module Isolated Drive Control Board 3V/3.3V Relay Power Switch Board for ESP8266 Microcontrollers Development Board
- 1 channel SRD-DC03V-SL-C equiped with high-current relay, compatible load: AC250V 10A ; DC30V 10A, each relay has normally open and normally closed contact, can be selected by jumper relay and TTL or ground.
- 1 channel 3V/3.3V power relay mdoule support photocoupler isolation control, support dual power supply input ensure high anti-iinterference ability, which can be input from microcontroller IO, with diode freewheel protection.
- The relay module is triggered by high level signal, with output signal indicator, signal input port can be connected to the I0 port of the single chip microcomputer and driven by high-level signal.
- The 3v relay board works well with ARM /PIC /AVR /MCU/Raspberry/CNC machine/NodeMCU/ ESP8266 module etc.
- 1 channel 3V relay module external wiring adopts the rotary crimping terminal to make the wiring more firm. It is equipped with a fixed installation hole for easy installation.
Rank No. #9
16 Channel I2C Interface Electromagnetic Relay Module for Arduino Raspberry esp32 3.3V 5.0V Maximum Current per Relay – 10A Peak On Board LED Indicator with PCF8575 chip SCL, SDA Pins
- BUILT AROUND THE PCF8575 CHIP – Uses the onboard PCF8575 16-bit I2C I/O expander to control 16 relay channels while reducing the number of GPIO pins needed from your Raspberry Pi, eps32, esp8266 or other controller.
- 16-CHANNEL I2C RELAY CONTROL – Control up to 16 electromagnetic relays from a single PCF8575-based module, making it a strong fit for Home Assistant, Arduino, and Raspberry Pi projects. Up to 8 boards can be connected to each I2C bus. 8 x 16 = 128 relays can be controlled via 4 wires!
- SPDT RELAYS WITH LED INDICATORS – Each channel includes SPDT contacts with Normally Open, Common, and Normally Closed switching, plus individual LED status indicators for fast visual confirmation
- WORKS WITH 3.3V AND 5V LOGIC – Designed for both 3.3V and 5.0V operation, so it integrates more easily with a wide range of microcontrollers and SBC-based automation systems
- LONG RELAY SERVICE LIFE – Rated for a minimum of 10,000,000 mechanical operations and 100,000 electrical operations at rated load.
Rank No. #10
3 Channel Relay Module, 3 Channel Relay Module, High Voltage Relay Board, with Isolated Optocoupler, Adopts Fault Tolerant Design, Electronic Relays (5v (Compatible with 3.3V))
- Meet Needs: 3 Channel Relay Module can set high or low , control voltage is AC0-250V or DC0-30V, control current is 0-7A, current is 5MA (such as 3.3V microcontroller control, need to have IO push pull output function)
- Fault Tolerant Design: 3 Channel Relay Module adopts fault tolerant design, even if the control line is damaged, the relay cannot operate
- Stable Performance: 3 Channel Relay Module has optocoupler isolation, has strong driving ability and stable performance
- Easy to Use: 3 Channel Relay Module has high efficiency, beautiful design, simple and wide application
- Direct Connection: Adopts humanized interface design, all interfaces of 3 Channel Relay Module can be directly connected through terminal wiring, which is very convenient
Last update on 2026-04-27 / Affiliate links / Images from Amazon Product Advertising API
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