20 Best 4 Channel Relay Module Schematic [2024]

Are you looking for the best 4 Channel Relay Module Schematic? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling 4 Channel Relay Module Schematic.

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1 ELEGOO 4 Channel DC 5V Relay Module with Optocoupler Compatible with Arduino UNO R3 MEGA 1280 DSP... ELEGOO 4 Channel DC 5V Relay Module with Optocoupler Compatible with Arduino UNO R3 MEGA 1280 DSP...
2 SunFounder 4 Channel 5V Relay Shield Module Compatible with Arduino R3 MEGA 2560 1280 DSP ARM PIC... SunFounder 4 Channel 5V Relay Shield Module Compatible with Arduino R3 MEGA 2560 1280 DSP ARM PIC...
3 HiLetgo 4 Channel 24V Relay Module with OPTO-Isolated Support High and Low Level Trigger for PLC... HiLetgo 4 Channel 24V Relay Module with OPTO-Isolated Support High and Low Level Trigger for PLC...
4 HiLetgo 12V 4 Channel Relay Module with OPTO-Isolated Support High and Low Level Trigger HiLetgo 12V 4 Channel Relay Module with OPTO-Isolated Support High and Low Level Trigger
5 HiLetgo 2pcs DC 12V 2 Channel Relay Module with Isolated Optocoupler High and Low Level H/L Level... HiLetgo 2pcs DC 12V 2 Channel Relay Module with Isolated Optocoupler High and Low Level H/L Level...
6 HiLetgo 2pcs 5V One Channel Relay Module Relay Switch with OPTO Isolation High Low Level Trigger HiLetgo 2pcs 5V One Channel Relay Module Relay Switch with OPTO Isolation High Low Level Trigger
7 HiLetgo 2pcs DC 24V 1 Channel Relay Module with OPTO Isolation Support High or Low Level Triggle HiLetgo 2pcs DC 24V 1 Channel Relay Module with OPTO Isolation Support High or Low Level Triggle
8 Songhe DC 1 Channel Optocoupler 3V/3.3V Relay High Level Driver Module Isolated Drive Control Board... Songhe DC 1 Channel Optocoupler 3V/3.3V Relay High Level Driver Module Isolated Drive Control...
9 Jade Leech Cosplay Wig Hair Costume Accessories for Octavinelle Halloween Role Play Jade Leech Cosplay Wig Hair Costume Accessories for Octavinelle Halloween Role Play
10 Logisys Corp. 4-Channel 12VDC Remote Control Relay Switch (RM04X) Logisys Corp. 4-Channel 12VDC Remote Control Relay Switch (RM04X)
11 HiLetgo 12V 1 Channel Relay Module With Optocoupler Isolation Support High or Low Level Trigger HiLetgo 12V 1 Channel Relay Module With Optocoupler Isolation Support High or Low Level Trigger
12 2Pcs DC 12V 4 Channel Relay Module Board Shield with Optocoupler Isolation Suport High/Low Level... 2Pcs DC 12V 4 Channel Relay Module Board Shield with Optocoupler Isolation Suport High/Low Level...
13 JBtek 4 Channel DC 5V Relay Module for Arduino Raspberry Pi DSP AVR PIC ARM JBtek 4 Channel DC 5V Relay Module for Arduino Raspberry Pi DSP AVR PIC ARM
14 SainSmart 4-Channel Relay Module SainSmart 4-Channel Relay Module
15 12V Relay Remote Switch Wireless RF Remote Control Switch 4 Channel Relay Module 433Mhz Transmitter... 12V Relay Remote Switch Wireless RF Remote Control Switch 4 Channel Relay Module 433Mhz...
16 HiLetgo 2pcs DC 24V 2 Channel Relay Module with Isolated Optocoupler High and Low Level H/L Level... HiLetgo 2pcs DC 24V 2 Channel Relay Module with Isolated Optocoupler High and Low Level H/L Level...
17 Valefod DC 5V Relay Module 1-Channel Relay Switch with Optocoupler Isolation High/Low Level Trigger,... Valefod DC 5V Relay Module 1-Channel Relay Switch with Optocoupler Isolation High/Low Level...
18 DSD TECH SH-BT04B 4 Channel Bluetooth Relay V2 Support Timer and Security Code DSD TECH SH-BT04B 4 Channel Bluetooth Relay V2 Support Timer and Security Code
19 4 pcs DC 5V 1 Channel Relay Module Board Shield High/Low Level Trigger with Optocoupler 4 pcs DC 5V 1 Channel Relay Module Board Shield High/Low Level Trigger with Optocoupler
20 4 Channel WiFi Momentary Inching Relay Self-Lock Switch Module,DIY WiFi Garage Door Controller... 4 Channel WiFi Momentary Inching Relay Self-Lock Switch Module,DIY WiFi Garage Door Controller...
Bestseller No. 1
ELEGOO 4 Channel DC 5V Relay Module with Optocoupler Compatible with Arduino UNO R3 MEGA 1280 DSP...
  • This relay module is 5V active low. Relay output maximum contact is AC250V 10A and DC30V 10A.
  • Standard interface can be directly connected with microcontrollers.
  • Working status indicator lights are conducive to the safe use
  • 4-channel relay interface board, which can be controlled directly by a wide range of microcontrollers such as Arduino, AVR, PIC, ARM, PLC, etc. It is...
  • Widely used for all MCU control, industrial sector, PLC control, smart home control. For a complete data sheet for this relay board, please download...
Bestseller No. 2
SunFounder 4 Channel 5V Relay Shield Module Compatible with Arduino R3 MEGA 2560 1280 DSP ARM PIC...
  • 5V 4-Channel Relay interface board, and each one needs 15-20mA Driver Current
  • Equiped with high-current relay, AC250V 10A ; DC30V 10A
  • Standard interface that can be controlled directly by microcontroller (Compatible with Arduino , 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic)
  • Indication LED’s for Relay output status
Bestseller No. 3
HiLetgo 4 Channel 24V Relay Module with OPTO-Isolated Support High and Low Level Trigger for PLC...
  • Module uses high-quality relay, normally open interface maximum load: AC 250V / 10A, DC 30V / 10A
  • SMD optocoupler isolation, strong driving capability, stable performance; trigger current 5mA
  • Each channel of the module can be set by jumper cap high or low level trigger;
Bestseller No. 4
HiLetgo 12V 4 Channel Relay Module with OPTO-Isolated Support High and Low Level Trigger
  • HiLetgo 12V 4 Channel Relay Module
  • Using SMD OPTOCOUPLER isolation
  • High and Low Level Trigger
Bestseller No. 5
HiLetgo 2pcs DC 12V 2 Channel Relay Module with Isolated Optocoupler High and Low Level H/L Level...
  • Can set high or low level trigger with jumper, to meet the demand of more trigger applications;
  • With patch optical isolation, strong drive ability and stable performance;
  • The module can be high or low by a jumper setting trigger;
  • Interface design humane, all interfaces can be connected directly via terminal wiring leads , very convenient ;
  • Fault-tolerant design , even if the control line is broken , the relay will not operate ;
Bestseller No. 6
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.
Bestseller No. 7
HiLetgo 2pcs DC 24V 1 Channel Relay Module with OPTO Isolation Support High or Low Level Triggle
  • 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.
Bestseller No. 8
Songhe DC 1 Channel Optocoupler 3V/3.3V Relay High Level Driver Module Isolated Drive Control Board...
  • Optocoupler Isolator:3V/3.3V power relay module supports photocoupler isolation control.
  • 30VDC 250VAC Load:The power switch is compatible with 10A 250VAC and 10A 30VDC load.
Bestseller No. 10
Logisys Corp. 4-Channel 12VDC Remote Control Relay Switch (RM04X)
  • Switch Between Latch and Momentary Modes
  • Keychain style handset
  • water-resistant receiver
  • remote can link onto your keychain
  • for use with devices such as electronic blinds, PC lighting mods, indoor/outdoor lighting, garage doors etc.
Bestseller No. 11
HiLetgo 12V 1 Channel Relay Module With Optocoupler Isolation Support High or Low Level Trigger
  • Module uses genuine high quality relay, normally open interface maximum load: AC 250V / 10A, DC 30V / 10A
  • Using optocoupler chip isolation, strong drive capability, stable performance; trigger current 5mA
  • Module can be set by jumper high or low trigger
  • 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
Bestseller No. 12
2Pcs DC 12V 4 Channel Relay Module Board Shield with Optocoupler Isolation Suport High/Low Level...
  • Input voltage is 12V, the max load of interface is AC 250V/10A, DC 30V/10A
  • SMD optocoupler isolation, strong driving ability, stable performance; trigger current 5mA
  • Can be set high or low level trigger with jumper
  • With Fault Tolerant Design, humanized terminals, even if the control line is broken, the relay will not take any action
  • With green power light, red relay status indicator light, can directly reflect the current module working condition
Bestseller No. 13
JBtek 4 Channel DC 5V Relay Module for Arduino Raspberry Pi DSP AVR PIC ARM
  • Equiped with high-current relay, AC250V 10A ; DC30V 10A
  • 5V 4-Channel Relay interface board, and each one needs 50-60mA Driver Current
  • Be able to control various appliances, and other equipments with large current
  • Application:Supports all MCU control, The industrial field, PLC control, Smart home control
  • Indication LED's for Relay output status
Bestseller No. 14
SainSmart 4-Channel Relay Module
  • 5V 4-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, MSP431, TTL logic)
  • Indication LED's for Relay output status
Bestseller No. 15
12V Relay Remote Switch Wireless RF Remote Control Switch 4 Channel Relay Module 433Mhz Transmitter...
  • 1. Wireless Remote Control Kits - The DC 12 volt relay switch is equipped with 4 channel wireless receiver that built with high stability, security...
  • 2. Home Automation Security Relay - Learning code of 433mhz wireless transmission module has high-level security for its low repetitive rate and...
  • 3. Remote Relay with 3 Modes of Operation – Use a jumper to configure 3 modes of operating selection pulse / momentary, hold / toggle and latching...
  • 4. Easy and Flexible Switch Relay – The wireless relay kit is a perfect remote switch for those hobbyists with home automation DIY projects or...
  • 5. Wide Applications – The wireless remote control switch can be widely used in short and long range turn devices on / off wirelessly, anti-theft...
Bestseller No. 16
HiLetgo 2pcs DC 24V 2 Channel Relay Module with Isolated Optocoupler High and Low Level H/L Level...
  • SMD optocoupler isolation, driving ability, stable performance; trigger current 5mA;
  • User-friendly interface design, all interfaces are available through the wiring terminal direct connection leads, very convenient.
  • MD optocoupler isolation, driving ability, stable performance; trigger current 5mA;
  • Authentic quality module 30A relay, normally open interfaces Maximum load: AC 250V / 30A, DC 30V / 30A;
SaleBestseller No. 17
Valefod DC 5V Relay Module 1-Channel Relay Switch with Optocoupler Isolation High/Low Level Trigger,...
  • 【Control Devices】The 1-channel relay module uses genuine high quality DC5V relay and SMD opto-isolator supporting high/low level trigger, widely...
  • 【Load Range】NO(Normally open) maximum load < AC 250V/10A, < DC 30V/10A. Trigger current of opto-isolator: 5mA.
  • 【Fault-tolerant Design】The relay will not operate even if the control line is disconnected.
  • 【Universal Interface】Equipped with screwed terminal plate and fixed bolt holes(diameter: 3.1 mm) on both sides for easy installation.
  • 【High Compatibility】The relay module can be controlled directly by 5V logic signals from microcontroller(8051, AVR, PIC, DSP, ARM, Raspberry Pi,...
Bestseller No. 18
DSD TECH SH-BT04B 4 Channel Bluetooth Relay V2 Support Timer and Security Code
  • More features: Compared with version 1, V2 adds many functions. Such as security authentication and timer functions.
  • Built-in DSD TECH Bluetooth 4.0 BLE module, Supports iOS devices(iPhone and iPad) and Android 4.3 devices or later
  • 4 Channel relay.Support 5V and 12 power supply.Support switching DC and AC.
  • Free APP for Android Phone and iPhone, please search "DSD TECH Switch" in the Google Play or AppStore.
  • DSD TECH provides a one-year warranty on this Bluetooth Relay. If you have any questions, please feel free to contact us.
Bestseller No. 19
4 pcs DC 5V 1 Channel Relay Module Board Shield High/Low Level Trigger with Optocoupler
  • The module uses genuine quality relay, normally open interfaces
  • Maximum load: AC 250V/10A, DC 30V/10A
  • SMD optocoupler isolation, strong driving ability, stable performance; trigger current 5mA
  • The module voltage 5V
  • The module can be set high or low triggered by jumper
Bestseller No. 20
4 Channel WiFi Momentary Inching Relay Self-Lock Switch Module,DIY WiFi Garage Door Controller...
  • Voice Control,works with Alexa Google Home Nest , Link "eWeLink Smart Home Fan" capability. You can request Alexa or Google assistant to turn your...
  • 4CH 12V eWelink WIFI Switch,Control 4 electrical appliances Individually, with Lower Power Input,easily to Power it with phone charger and micro usb...
  • Easily Share Function,Share Control with Other eWelink Accounts,Invite Family to Enjoy Free Remote Contorl,Free app remote(Invitees need to download...
  • Three working modes: Inching Self-locking Interlock. can be used for DIY Garage Door Opener and other Home Appliance.You can set working mode by...
  • Timing and Status Real-time Monitor. Smart Scene: Trigger on/off by temperature, humidity or other environmental conditions,It supports 8 group timing...

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FAQ:

Q: What is a 4 Channel relay?

A: The 4 Channel Relay Module is a convenient board which can be used to control high voltage, high current load such as motor, solenoid valves, lamps and AC load. It is designed to interface with microcontroller such as Arduino, PIC and etc.

Q: What is an Arduino relay module?

A: Relay module for Arduino is one of the most powerful application for Arduino as it can be used to control both A.C and D.C devices by simply controlling the relay by giving 5V. A relay is basically a switch which is operated electrically by electromagnet. A relay can be used to control high voltage electronic devices such as motors and as well as low voltage electronic devices such as a light …

Q: How to use relay with schematic of relay circuit diagram?

A: Thinner cables can be used to connect the control switch to the relay thereby saving weight,space and cost. Relays allow power to be routed to a device over the shortest distance,thereby reducing voltage loss. Heavy gauge cable only needs to be used to connect a power source (via the relay) to the device.

Q: What is a 4 pin relay?

A: i) Single Pole Single Throw (SPST) – Such relay has 4 terminal pins which consists of a pair of coil pins and a pair of pins which can be made connected or disconnected by activating or deactivating the relay. Such relay can categorized into normally open or normally closed type.