Shop opto-isolated relay module

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$39.55
Phoenix Contact 2900359, PLC-OPT-120UC/ 48DC/100/SEN, Solid-State Relay Module
Airline Hydraulics Microsoft
$39.55
Phoenix Contact 2900359, PLC-OPT-120UC/ 48DC/100/SEN, Solid-State Relay Module
Airline Hydraulics Microsoft
$28.50
Optocoupler Relay: 0.5A, SPDT, 35mm DIN rail mount (PN# 52510)
Automation Direct
2
$28.50
Optocoupler Relay: 0.5A, SPDT, 35mm DIN rail mount (PN# 52510)
Automation Direct
$22.50
Optocoupler Relay: 0.5A, SPST, 35mm DIN rail mount (PN# 52550)
Automation Direct
$22.50
Optocoupler Relay: 0.5A, SPST, 35mm DIN rail mount (PN# 52550)
Automation Direct
$0.47
$0.59
DC 3V 5V 12V 24V 1 Channel Relay Optocoupler Isolated Drive Control Module High Level Drive Board
AliExpress
20% off
$0.47
$0.59
DC 3V 5V 12V 24V 1 Channel Relay Optocoupler Isolated Drive Control Module High Level Drive Board
AliExpress
$15.99
Dafurui 5V Relay Module8pack 1 Channel Relay Module 5V Relays Board With Optocoupler Support High/Low Level Trigger For Arduino Relays
Amazon.com
76
$15.99
Dafurui 5V Relay Module8pack 1 Channel Relay Module 5V Relays Board With Optocoupler Support High/Low Level Trigger For Arduino Relays
Amazon.com
$298.00
Relay Output Module: 8-pt, 12-24 VDC/12-240 VAC (PN# F3-08TRS-1)
Automation Direct
$298.00
Relay Output Module: 8-pt, 12-24 VDC/12-240 VAC (PN# F3-08TRS-1)
Automation Direct
$0.80
$1.11
5V/12V/24V Multi-Channel Relay Module (1/2/4/6/8 Channels) - Optocoupler-Isolated Low-Level Trigger
AliExpress
27% off
$0.80
$1.11
5V/12V/24V Multi-Channel Relay Module (1/2/4/6/8 Channels) - Optocoupler-Isolated Low-Level Trigger
AliExpress
$105.49
5V 12V 1/2/4/8 Channel Relay Module Optocoupler Isolated Low-Level Trigger 51AVR
eBay
$105.49
5V 12V 1/2/4/8 Channel Relay Module Optocoupler Isolated Low-Level Trigger 51AVR
eBay
$31.64
24V 4 Channel Relay Module With OPTO-Isolated High And Low Level Trigger
eBay
Free shipping
$31.64
24V 4 Channel Relay Module With OPTO-Isolated High And Low Level Trigger
eBay
$0.83
$1.10
1 Channel DC 3V Relay High Level Driver Module Optocoupler Relay Module Isolated Drive Control Board
AliExpress
24% off
$0.83
$1.10
1 Channel DC 3V Relay High Level Driver Module Optocoupler Relay Module Isolated Drive Control Board
AliExpress
$20.00
Optocoupler Relay: 0.5A, SPST, 35mm DIN rail mount (PN# 52507)
Automation Direct
$20.00
Optocoupler Relay: 0.5A, SPST, 35mm DIN rail mount (PN# 52507)
Automation Direct
$7.76
$13.81
High Level Trigger Relay Module Optocoupler Relay Module DC 3V/3.3V Isolated Drive Control Board
AliExpress
Free shipping
43% off
$7.76
$13.81
High Level Trigger Relay Module Optocoupler Relay Module DC 3V/3.3V Isolated Drive Control Board
AliExpress
$1.91
$3.85
1/2/4/8 Channel Relay Module 5V/12V/24V With Optocoupler Isolation High/Low Level Dual Trigger For
AliExpress
50% off
$1.91
$3.85
1/2/4/8 Channel Relay Module 5V/12V/24V With Optocoupler Isolation High/Low Level Dual Trigger For
AliExpress
$364.00
Allen-Bradley 1769-OW8I Relay Output Module 8 Isolated Point, B
PLCHardware.com
$364.00
Allen-Bradley 1769-OW8I Relay Output Module 8 Isolated Point, B
PLCHardware.com
$47.98
8 Channel 5V/12V/24V High And Low Level Optocoupler Isolation Relay Module
eBay
Free shipping
$47.98
8 Channel 5V/12V/24V High And Low Level Optocoupler Isolation Relay Module
eBay
$24.16
2PCS 12V 8 Channel Relay Module Optocoupler Isolated High Low Trigger Switch
eBay
Free shipping
$24.16
2PCS 12V 8 Channel Relay Module Optocoupler Isolated High Low Trigger Switch
eBay
$3.77
DC 3V/3.3V 1 Channel High Level Driver Relay Module Optocoupler Isolated Drive Control Board For
AliExpress
$3.77
DC 3V/3.3V 1 Channel High Level Driver Relay Module Optocoupler Isolated Drive Control Board For
AliExpress
$33.73
16 Channel 9-36V USB Controlled SPDT Relay Module Opto-Isolated Board SRD-5VDC
eBay
Free shipping
$33.73
16 Channel 9-36V USB Controlled SPDT Relay Module Opto-Isolated Board SRD-5VDC
eBay
$4.28
5V 1CH Isolated Relay Module With Optocoupler FOR Arduino PIC ARM DSP AVR
eBay
Free shipping
$4.28
5V 1CH Isolated Relay Module With Optocoupler FOR Arduino PIC ARM DSP AVR
eBay
$23.98
12V 8 Channel Relay Module With OPTO-Isolated High And Low Level Trigger 8 Wa...
eBay
Free shipping
$23.98
12V 8 Channel Relay Module With OPTO-Isolated High And Low Level Trigger 8 Wa...
eBay
$14.17
5V/12V 1 Way Relay Module With Optocoupler Isolation Relay Board High Quality
eBay
Free shipping
$14.17
5V/12V 1 Way Relay Module With Optocoupler Isolation Relay Board High Quality
eBay
$1.01
$1.37
3.3V 5V 3 Channel Relay Module 5Ma With Optocoupler Isolation Compatible Signal
AliExpress
Free shipping
26% off
$1.01
$1.37
3.3V 5V 3 Channel Relay Module 5Ma With Optocoupler Isolation Compatible Signal
AliExpress
$4.08
3-Channel Relay Module With Optocoupler Isolation Compatible 3.3V 5V Signal Kit
eBay
Free shipping
$4.08
3-Channel Relay Module With Optocoupler Isolation Compatible 3.3V 5V Signal Kit
eBay
$20.50
Optocoupler Relay: 2A, SPST, 35mm DIN rail mount (PN# 52501)
Automation Direct
1
$20.50
Optocoupler Relay: 2A, SPST, 35mm DIN rail mount (PN# 52501)
Automation Direct
$33.79
8CH DIN-Rail Optocoupler Isolated Pluggable Relay Module Contact Capacity Maximum 16A Trigger Signal
AliExpress
$33.79
8CH DIN-Rail Optocoupler Isolated Pluggable Relay Module Contact Capacity Maximum 16A Trigger Signal
AliExpress
$3.62
DC 5V 12V 24V 30A High Power 1 Channel Relay Module With Optocoupler Isolation Board High Low Level
AliExpress
$3.62
DC 5V 12V 24V 30A High Power 1 Channel Relay Module With Optocoupler Isolation Board High Low Level
AliExpress
$3.57
1 2 4 8 Channel Relay Module 30A With Optocoupler Isolation 5V 12V 24V Supports High And Low Triger
AliExpress
$3.57
1 2 4 8 Channel Relay Module 30A With Optocoupler Isolation 5V 12V 24V Supports High And Low Triger
AliExpress
$7.39
$8.03
4 8 Channel Relay Module 30A With Optocoupler Isolation 5V 12V 24V Supports High And Low Triger
AliExpress
Free shipping
$7.39
$8.03
4 8 Channel Relay Module 30A With Optocoupler Isolation 5V 12V 24V Supports High And Low Triger
AliExpress
$3.04
1PCS 3.3V 5V 3 Channel Relay Module 5Ma With Optocoupler Isolation Compatible Signal For Arduino
AliExpress
$3.04
1PCS 3.3V 5V 3 Channel Relay Module 5Ma With Optocoupler Isolation Compatible Signal For Arduino
AliExpress
$1.82
$3.67
1PCS 5V 12V 24V 1/2/4/8 Channel Relay Module Board With Optocoupler Isolation Compatible With
AliExpress
50% off
$1.82
$3.67
1PCS 5V 12V 24V 1/2/4/8 Channel Relay Module Board With Optocoupler Isolation Compatible With
AliExpress
$2.02
3.3V 5V 12V 24V 1 Channel Relay Module High And Low Level Trigger Dual Optocoupler Isolation Relay
AliExpress
$2.02
3.3V 5V 12V 24V 1 Channel Relay Module High And Low Level Trigger Dual Optocoupler Isolation Relay
AliExpress
$2.05
$4.18
5V 9V 12V 24V One 1 Channel Relay Module Shield With Optocoupler Isolation Relay Switch Board
AliExpress
50% off
$2.05
$4.18
5V 9V 12V 24V One 1 Channel Relay Module Shield With Optocoupler Isolation Relay Switch Board
AliExpress
$2.92
3.3V 5V 12V 24V 1 Channel Relay Module High And Low Level Trigger Dual Optocoupler Isolation Relay
AliExpress
$2.92
3.3V 5V 12V 24V 1 Channel Relay Module High And Low Level Trigger Dual Optocoupler Isolation Relay
AliExpress
$2.80
$5.59
1/2/4 Channel Relay Module 30A With Optocoupler Isolation 5V 12V 24V Supports High And Low Triger
AliExpress
Free shipping
49% off
$2.80
$5.59
1/2/4 Channel Relay Module 30A With Optocoupler Isolation 5V 12V 24V Supports High And Low Triger
AliExpress
$0.90
$1.21
5V 12V 24V Low-Level Trigger 1 Channel Relay Module Optocoupler Isolation PLC Control Drive Board
AliExpress
25% off
$0.90
$1.21
5V 12V 24V Low-Level Trigger 1 Channel Relay Module Optocoupler Isolation PLC Control Drive Board
AliExpress
$10.53
$10.81
16 Channel Relay Module With Optocoupler Protection LM2596 Power Control Board Module 5V Or 12V For
AliExpress
$10.53
$10.81
16 Channel Relay Module With Optocoupler Protection LM2596 Power Control Board Module 5V Or 12V For
AliExpress
Configurable Active High or Low Relay Module, with opto-isolated input
1:57
Configurable Active High or Low Relay Module, with opto-isolated input
65K viewsAug 10, 2019
YouTubeCytron Technologies
How Optocouplers work - opto-isolator solid state relays phototransistor
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How Optocouplers work - opto-isolator solid state relays phototransistor
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YouTubeThe Engineering Mindset
Automation Tools - Solid State Relay Opto Isolator
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Find in video from 00:15DC to DC Module Features
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NO NC Relay (1-Channel) DC 5V with Optocoupler Isolator
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How to Control a Relay Module Using Optocoupler & Transistor in Proteus | Isolated Power Switching
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How to Control a Relay Module Using Optocoupler & Transistor in Proteus | Isolated Power Switching
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5V 1 Channel Level Trigger Optocoupler Relay Module For Arduino
122.9K viewsJun 11, 2019
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Isolated Power, Relay & RS485 PCB using Optocouplers and ADUM1201 Digital Isolator
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Waveshare Modbus RTU Relay，Supports Modbus RTU/TCP protocols，Optocoupler isolation protection #relay
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24V 8-Channel Relay Module ⚡ | Optocoupler Protection Explained! #shorts #electronics
2.2K views9 months ago
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Electronic components comparison : Optocouplers vs Relays
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4PCS DC 12V 2 Channel Relay Module with Isolated Optocoupler Supports High and Low Level H/L Level Trigger Module Triggered
Feb 18, 2025
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Shop opto-isolated relay module

Sponsored
About our ads
$39.55
Phoenix Contact 2900359, PLC-OPT-120UC/ 48DC/100/SEN, Solid-State Relay Module
Airline Hydraulics Microsoft
$39.55
Phoenix Contact 2900359, PLC-OPT-120UC/ 48DC/100/SEN, Solid-State Relay Module
Airline Hydraulics Microsoft
$28.50
Optocoupler Relay: 0.5A, SPDT, 35mm DIN rail mount (PN# 52510)
Automation Direct
2
$28.50
Optocoupler Relay: 0.5A, SPDT, 35mm DIN rail mount (PN# 52510)
Automation Direct
$22.50
Optocoupler Relay: 0.5A, SPST, 35mm DIN rail mount (PN# 52550)
Automation Direct
$22.50
Optocoupler Relay: 0.5A, SPST, 35mm DIN rail mount (PN# 52550)
Automation Direct
$0.47
$0.59
DC 3V 5V 12V 24V 1 Channel Relay Optocoupler Isolated Drive Control Module High Level Drive Board
AliExpress
20% off
$0.47
$0.59
DC 3V 5V 12V 24V 1 Channel Relay Optocoupler Isolated Drive Control Module High Level Drive Board
AliExpress
$15.99
Dafurui 5V Relay Module8pack 1 Channel Relay Module 5V Relays Board With Optocoupler Support High/Low Level Trigger For Arduino Relays
Amazon.com
76
$15.99
Dafurui 5V Relay Module8pack 1 Channel Relay Module 5V Relays Board With Optocoupler Support High/Low Level Trigger For Arduino Relays
Amazon.com
$298.00
Relay Output Module: 8-pt, 12-24 VDC/12-240 VAC (PN# F3-08TRS-1)
Automation Direct
$298.00
Relay Output Module: 8-pt, 12-24 VDC/12-240 VAC (PN# F3-08TRS-1)
Automation Direct
$0.80
$1.11
5V/12V/24V Multi-Channel Relay Module (1/2/4/6/8 Channels) - Optocoupler-Isolated Low-Level Trigger
AliExpress
27% off
$0.80
$1.11
5V/12V/24V Multi-Channel Relay Module (1/2/4/6/8 Channels) - Optocoupler-Isolated Low-Level Trigger
AliExpress
$105.49
5V 12V 1/2/4/8 Channel Relay Module Optocoupler Isolated Low-Level Trigger 51AVR
eBay
$105.49
5V 12V 1/2/4/8 Channel Relay Module Optocoupler Isolated Low-Level Trigger 51AVR
eBay
$31.64
24V 4 Channel Relay Module With OPTO-Isolated High And Low Level Trigger
eBay
Free shipping
$31.64
24V 4 Channel Relay Module With OPTO-Isolated High And Low Level Trigger
eBay
$0.83
$1.10
1 Channel DC 3V Relay High Level Driver Module Optocoupler Relay Module Isolated Drive Control Board
AliExpress
24% off
$0.83
$1.10
1 Channel DC 3V Relay High Level Driver Module Optocoupler Relay Module Isolated Drive Control Board
AliExpress
$20.00
Optocoupler Relay: 0.5A, SPST, 35mm DIN rail mount (PN# 52507)
Automation Direct
$20.00
Optocoupler Relay: 0.5A, SPST, 35mm DIN rail mount (PN# 52507)
Automation Direct
$7.76
$13.81
High Level Trigger Relay Module Optocoupler Relay Module DC 3V/3.3V Isolated Drive Control Board
AliExpress
Free shipping
43% off
$7.76
$13.81
High Level Trigger Relay Module Optocoupler Relay Module DC 3V/3.3V Isolated Drive Control Board
AliExpress
$1.91
$3.85
1/2/4/8 Channel Relay Module 5V/12V/24V With Optocoupler Isolation High/Low Level Dual Trigger For
AliExpress
50% off
$1.91
$3.85
1/2/4/8 Channel Relay Module 5V/12V/24V With Optocoupler Isolation High/Low Level Dual Trigger For
AliExpress
$364.00
Allen-Bradley 1769-OW8I Relay Output Module 8 Isolated Point, B
PLCHardware.com
$364.00
Allen-Bradley 1769-OW8I Relay Output Module 8 Isolated Point, B
PLCHardware.com
$47.98
8 Channel 5V/12V/24V High And Low Level Optocoupler Isolation Relay Module
eBay
Free shipping
$47.98
8 Channel 5V/12V/24V High And Low Level Optocoupler Isolation Relay Module
eBay
$24.16
2PCS 12V 8 Channel Relay Module Optocoupler Isolated High Low Trigger Switch
eBay
Free shipping
$24.16
2PCS 12V 8 Channel Relay Module Optocoupler Isolated High Low Trigger Switch
eBay
$3.77
DC 3V/3.3V 1 Channel High Level Driver Relay Module Optocoupler Isolated Drive Control Board For
AliExpress
$3.77
DC 3V/3.3V 1 Channel High Level Driver Relay Module Optocoupler Isolated Drive Control Board For
AliExpress
$33.73
16 Channel 9-36V USB Controlled SPDT Relay Module Opto-Isolated Board SRD-5VDC
eBay
Free shipping
$33.73
16 Channel 9-36V USB Controlled SPDT Relay Module Opto-Isolated Board SRD-5VDC
eBay