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Best Choice SING F LTD 
SING F LTD 4X 1-Channel PC817 Optocoupler Isolation Module (3-5V) Suitable for Photoelectric Isolator Signal Ssolation 1-Channel PC817 Optocoupler Isolation module adopts 5.0 pitch screw terminals for easy wiring.Best Value EMSea 
EMSea 2Pcs Optical Isolator Module Voltage to Current Converter Module Input Optoisolator 12V 80KHz 1 Channel PC817 EL81 It is made of premium material, which is not easy to wear and comfortable to touch.MiZOELEC 
PC827 Light Coupling Patch SOP8 optoisolator photoelectric Coupling 10PCS PC827 Light Coupling Patch SOP8 optoisolator photoelectric Coupling 10PCSSING F LTD SING F LTD 4X 1-Channel PC817 Optocoupler Isolation Module (12V) Suitable for Photoelectric Isolator Signal Ssolation an 1-Channel PC817 Optocoupler Isolation module adopts 5.0 pitch screw terminals for easy wiring.TYSQXQ 
24V Converter Module 80KHz Photoelectric Optoisolator 12V PNP NPN Signal Converter PC817 Optocoupler Optoisolator 24V Converter Module 80KHz Photoelectric Optoisolator 12V PNP NPN Signal Converter PC817 Optocoupler OptoisolatorJenngaoo 
Opto-isolator Module, 1 Channel Optocoupler Insulation Board, Optoelectronic Signal Isolation and Anti-interference Modu HIGH QUALITY --- The optocoupler insulation module is made of high quality material and can be used to detect the presenTECNOIOT 
TECNOIOT 5pcs TLP281 4CH Channel Opto-Isolator IC Module Board Optocoupler Insulation TLP281: This board is suitable for connecting digital systems (e.g. a 5V microcontroller) to high voltage or interferencGODIYMODULES 2Pcs TLP281 4 Channel optoisolator IC Module for Arduino Expansion Board high and Low Level optocoupler 2Pcs TLP281 4 channel optoisolator IC module for Arduino Expansion board high and low level optocouplerTYSQXQ 10pcs 4N26 DIP-6 Optoisolator Transistor Output Package Content:4N26 DIP-6 Optoisolator Transistor 10pcsDIANN DIANN 8 Channel Relay Module DC 5V Relay Board with OPTO-Isolated Support High or Low Level Trigger 8 Channel Relay Module’s Path Can Be Triggered By High Level or Low Level Through Jumper Setting; Trigger Current of OptTreedix Treedix Opto-Isolator Breakout Board with Two Photodiodes Built-in Comes with 2 Channel Coupler for High-Voltage or Nois This is specially designed for optical isolation, which helps to connect digital systems to high-voltage or noisy systemZenithAur ZenithAur PWM Driver Module with Opto-Isolator for MCU IO Signal Isolation, a Low Voltage 3V 5V Controlled MOSFET Switch HIGH VOLTAGE SWITCHING: Employs a MOS transistor to let a 3V / 5V low voltage signal manage high voltage devices. This FDIANN DIANN 8 Channel Relay Module DC 12V Relay Board with OPTO-Isolated Support High or Low Level Trigger 8 Channel Relay Module’s Path Can Be Triggered By High Level or Low Level Through Jumper Setting; Trigger Current of OptDONGKER Optocoupler Isolation Board, 8CH Optocoupler Isolation Module DC 3.3V 5V 8-Channel PNP NPN Low High Level Output Signal Optocoupler isolation control.TIKATARER TIKATARER 40A Dual-Way SCR Solid State Relay Module with Opto-Isolator for AC-AC Input, CE Certified, for Real Time LED [POWERFUL PERFORMANCE] - Dual-way SCR input with zero starting voltage and Ioff, ensuring efficient operation. Opto-isolDONGKER Optocoupler Isolation Board, Signal Converter Module Voltage Level Current Voltage Converter Module 80KHz 1-Channel Opto ❤Isolation Voltage:more than 3000V . Input Current:50MA(MAX). Operating Current:more than 1MA. Output Maximum Current:50MachineMid 10pcs/lot PC827 SOP-8 SOP optoisolator photoelectric Coupling 10pcs/lot PC827 SOP-8 SOP optoisolator photoelectric couplingReland Sun TLP281 4 CH 4-Channel Opto-Isolator IC Module for Arduino Expansion Board High and Low Level Optocoupler Isolation 4 Cha Reland SunTYSQXQ 10pcs/lot TLP293-4 Optoisolator Transistor Output 3750Vrms 4 Channel 16-SO SOP6 Part Number: TLP293-4 SOP6Generic 10PCS AQH3223 Optocoupler Optoisolator DIP-7 Good AQH3223 DIP-7 （10pieces）Generic 10pcs 4N28 DIP-6 FSC Optoisolators Transistor Package contents:4N28 DIP-6 (10pieces )SioNS TLP109 Light Coupling into SOP5 optoisolator Coupling 10pieces TLP109 Light Coupling into SOP5 optoisolator Coupling 10piecesXYZOOM XYWHPGV Dip 4 Pin Sharp PC817 Optocoupler Photocoupler Optoisolator 20pcs(80148 46ba8 08926 3aa78 d5d0d 26686 GuuYebe 5PCS VTL5C VTL5C1 DIP-4 M1210CLC for Audio Opto-Coupler Vactrol New Linear optocoupler Photoconductive Cells and Optoiso VTL5C VTL5C1 for Audio Opto-Coupler Vactrol NewRakstore Rakstore 4pcs TLP281 4-Channel Opto-Isolator IC Module Expansion Board High and Low Level Optocoupler Isolation Function: Use low level to control high level. For example, use the 3V or 5V voltage of the microcontroller to control tGeneric 5PCS/LOT AQH3223 Optocoupler DIP-7 Optoisolator Optocoupler AQH3223 DIP-7 （5pieces）Generic Set of 10 SOP-5 ELM611 ELM611(TA) opto-Isolator optocoupler SMD5 high Package contents:ELM611 SOP-5（10pieces）Reland Sun Reland Sun 10pcs PC827 SOP-8 EL827 TLV827 TLV-827 SOP optoisolator photoelectric coupling 10pcs PC827 SOP-8 EL827 TLV827 TLV-827 SOP optoisolator photoelectric couplingMiZOELEC 10pcs/lot MOC3061 M0C3061 DIP-6 Optoisolator - Triac 10pcs/lot MOC3061 M0C3061 DIP-6 Optoisolator - TriacReland Sun 10PCS/LOT TLP281 4 CH 4-Channel Opto-Isolator IC Module for Arduino Expansion Board High and Low Level Optocoupler Isola Reland SunMiZOELEC 10pcs/lot 6N138 DIP-8 optoisolator photoelectric Coupling 10pcs/lot 6N138 DIP-8 optoisolator photoelectric couplingZAICOLER ZAICOLER Advanced 40A Solid State Relay Module with Opto-Isolator, for Professional Electricians [HIGHLY EFFICIENT] allows for zero-volt start and zero IoffTYSQXQ 10pcs PC900V Light Coupl g Patch SOP6 optoisolator photoelectric Couplg PC900VZDETGU ZDETGU 4 Channel Optocoupler Isolated Board Voltage Converter Module for Isolation and Shifting, Reliable Adapter for Hi Versatile Voltage Control: This module provides isolation control and voltage conversion for precise operation, adaptingFilfeel FILFEEL 817 4 Channel Optocoupler Isolated Board Voltage Converter Adapter Module for 3.3V/5V to 3.6-24V Control Compati Voltage Conversion- This module efficiently converts 3.3V or 5V logic signals to control interfaces operating at 3.6–24VGuuYebe 10PCS VTL5C VTL5C1 DIP-4 M1210CLC for Audio Opto-Coupler Vactrol New Linear optocoupler Photoconductive Cells and Optois VTL5C VTL5C1 for Audio Opto-Coupler Vactrol NewGeneric TLP759 Light Coupling Patch SOP8 optoisolator photoelectric Coupling 10pcs /LOT Package contents:TLP759 SOP8 (10pieces)RASTKY RASTKY Solid State Relay 40A Module with Opto-Isolator, CE Certified, Ideal for Machinery Control, for Professional Use [ AND EFFICIENT] Zero starting voltage and Ioff ensures immediate response and efficient operation of this solid state rNOYITO NOYITO 4-Channel Optocoupler Photoelectric Isolator Module Level Voltage Converter Module PLC Signal Converter Module PN NOYITO 4-Channel Optocoupler Photoelectric Isolator Module Level Voltage Converter Module with high quality optocouplerSxhlseller Sxhlseller 16 Channel Relay Module, USB Serial Port Control ON Off Relay Board with Optoisolator for Automation, LED Pow [High Durability & Stable Design]: Meticulously crafted 16 channel relay board features a robust SPDT relay and PCB consFdit Fdit Solid State Relay 40A ACAC, Dual SCR -Pang, OPTOISOLATOR, CERTIFLIFIMY CER [Simple configuration] The new and old types are random for a simple installationCryfokt Cryfokt 40A Dual-Way SCR Solid State Relay Module for AC-AC Input, Opto-Isolator, CE Certified, for Real-time Monitoring [DUAL-WAY SCR INPUT] ensures zero volt starting voltage and zero Ioff for efficient performance.Mingzhe SSR 40AA 40A Solid State Relay Module Dual-Way Input 90- Output 24-480V AC Opto-Isolator LED Display Plastic+Metal [ Design] : Made of plastic and metal, ensures performance in various environments.Orivin Orivin 2 PCS Optical Isolator Module, Optocoupler 3V-5V12V/24V,5KHz 1 Channel Insulated Current Transformer Board PC817 This optocoupler module provides reliable electrical isolation between circuits, preventing voltage spikes and noise intBaxnore Baxnore Optocoupler Isolation Board, 4 Channel Optocoupler Isolation Module, PLC Level Converter Board, PCB Isolation Bo Stable Performance: The optocoupler isolator guarantees consistent working performance; It ensures that your systems manThe Lord of the Tools The Lord of the Tools 4x 1-Channel PC817 Optocoupler Isolation Module (3-5V) Suitable for Photoelectric Isolator Signal 1-Channel PC817 Optocoupler Isolation module adopts 5.0 pitch screw terminals for easy wiring.DONGKER DC 3.3V/5V 4-Channel PLC Amplifier Circuit Board, Photoelectric Optoisolator MOS Tube FET Module Drive Module Optocouple It adopts DIN35mm flame retardant shell and standard guide rail type installation design.Gikfun Gikfun OPTOCOUPLER DIP-4 PC817C PC817 for Arduino Diy (Pack of 20pcs) AE1143 Gikfun Packing 20pcs OPTOCOUPLER DIP-4 PC817C PC817Morelian Morelian 40A Solid State Relay Module, AC-AC Input 90- Output 24-480V, Opto-Isolator for Dual-Way SCR Input, LED Light d [High Voltage ] Withstands isolation voltage of between input and output, ensuring durability and longevity.Morelian Morelian 40A Solid State Relay Module, AC-AC Input 90- Output 24-480V, Opto-Isolator for Dual-Way SCR Input, LED Light d [High Voltage ] Withstands isolation voltage of between input and output, ensuring durability and longevity.TYSQXQ 10pcs TLP250 Optoisolators X36 PB-F Driver Coupler 8 Gull W TLP250F TLP250(F) TIP250 DIP8/SOP8 Model Number: TLP250Generic Generic 40A Solid State Relay Module AC-AC Input 90- Output 24-480V Opto-Isolator CE Certification LED Display for DIY E [DUAL-WAY SCR INPUT] allows for a zero-volt starting voltage and zero Ioff, ensuring efficient operationDBParts DBParts New for 20PCS MOC3041 Zero-Cross Optoisolators Triac Driver 6-DIP Brand NewHOBBYIN HOBBYIN 5PCS 1 Channel Optocoupler Isolation Module,DC12V Optocoupler Isolation Module EL817 Opto PNP NPN Signal Convert Reliable Optocoupler Isolation: The 5 PCS Optocoupler Isolation Board is designed to provide reliable signal isolation aYOUMILE Youmile 5PACK Expansion Board TLP281 4 Channel 4CH Optocoupler IC Module for High and Low Optocoupler Isolation for Ardu Four LEDs: Four LEDs and four photo diodes are integrated into this IC.Podazz Podazz 5Pcs DC 1-Channel Optocoupler 3V/3.3V Relay High Level Driver Module, Isolated Driver Controller Board for Arduin 【Product Parameters】30VDC 250VAC load with high current relays, AC250V 10A ; DC30V 10A, each relay has normally open andAlinan Alinan 4pcs 4CH Optocoupler PC817 4 Channel Isolation Board Voltage Converter Adapter Module 3.6-30V Driver Photoelectri ★Driving Port Signal Voltage: 3.6-24V; Output Port Voltage Port: 3.6-30VHiLetgo HiLetgo 12V 4 Channel Relay Module With Opto-Isolated Support High And Low Level Trigger HiLetgo 12V 4 Channel Relay ModuleSGUESIKR SGUESIKR Premium 4-Pack PoE Splitter 12V 1.2A, High-End Active PoE to 2.1mm DC - IEEE 802.3af/at Compliant, Crafted with 【Advanced Technology】: We've elevated our PoE Splitter using superior USA chipset & opto-electronic isolation, ensuringMUNEFE MUNEFE Signal Converter Board, Power Conversion Board, Channel Optocoupler Board for Ensuring Fast and Stable Signal Con ROBUST DESIGN: This optical isolation module is made of superior materials that enhance its resisting to damage and ensuComimark Comimark 10Pcs LCR0203 LCR-0203 Linear optocoupler DIP-4 This is LCR0203 LCR-0203 linear optocoupler DIP-4DBParts DBParts New for 20PCS MOC3052 Fairchild optocoupler Triac Driver Brand NewDONGKER 8-Channel PLC Amplifier Circuit Board, PLC Amplifier Circuit Board DC 3.3V/DC 5V Optocoupler Isolated Module It uses high-quality transistors,superior performance,stable and reliable quality.fasient DC 6-30V Digital LED Relay Board Cycle Timing Circuit Switch Timer Delay Trigger Module Micro USB 5V 6-30V input voltage range, support micro USB 5.0V power supply, convenient to useAUNMAS AUNMAS Solid State Relay 40A, Plastic Metal AC AC Relay Module 90-280V Control 24-480V Load, Dual SCR Input Opto Isolate 【Dual SCR Control】This solid state relay 40A uses dual way SCR input with zero volt starting for stable AC AC switching.Generic Generic SSR 40AA 40A Relay Module with SCR Input for Zero Ioff, CE Certified, Recommend for Energy Management [EFFICIENT OPERATION] Zero volt starting with dual-way SCR input for optimal performanceCSCPEXCZ Signal Isolator 4-20mA to 0-10V 0-5V 1-5V 1 in 1 Out Analog Signal Converter 4-20mA to RS485 Relay DC24V Signal Isolator OptoisolatorsONTYLTFP 2-Input 4-Output Signal Converter 4-20mA to 0-10V 0-5V 1-5V(Output 0-5V) OptoisolatorsCSCPEXCZ Signal Isolator 4-20mA to 0-10V 0-5V 1-5V 1 in 1 Out Analog Signal Converter 4-20mA to RS485 Relay DC24V Signal Isolator OptoisolatorsWisoqu 5V 8 Channel Relay Module for Pico, with Photocoupler Isolation and USB Port Boot Pin Power Isolation: This 8 channel relay module provides stable isolation voltage, the isolated terminal does not require aCSCPEXCZ Signal Isolator 4-20mA to 0-10V 0-5V 1-5V 1 in 1 Out Analog Signal Converter 4-20mA to RS485 Relay DC24V Signal Isolator OptoisolatorsTIKATARER TIKATARER Dual-Way SCR Input Solid State Relay Module AC-AC 40A Output 24-480V for DIY Projects [EFFICIENT PERFORMANCE] 40A Solid State Relay Module ensures top-tier performance and reliability. Optimal for AC-AC appCryfokt Cryfokt 40A Solid State Relay Module with Zero Volt Starting Voltage, Isolation Withstand, for DIY Projects [HIGH PERFORMANCE SOLID STATE RELAY] Dual-way SCR input allows zero starting voltage and Ioff, ensuring reliable operatiSpacnana Spacnana Solid State Relay, 40A Module, AC Input 90-, AC Output 24-480V, Reliable Control for Home Automation and Indust [High Current Capacity]Rated for 40A load current, ideal for automation and high-power applications.Xiuganpo Xiuganpo 40A Solid State Relay Module with Zero Volt Starting Voltage, Isolation Withstand, for DIY Projects [HIGH PERFORMANCE SOLID STATE RELAY] Dual-way SCR input allows zero starting voltage and Ioff, ensuring reliable operatiYechiry Yechiry 40A Dual-Way Solid State Relay Module for Real-time AC-AC Control, CE Certified, Suitable for Industrial Use [HIGH-PERFORMANCE RELAY MODULE] Dual-way SCR input ensures immediate response with zero starting voltage and zero Ioff.TIKATARER TIKATARER 40A Solid State Relay with LED Display, Pass Load-Current Aging Test, for AC-AC Input Systems, Ideal for Home [START INSTANTLY] Zero volt starting for immediate activation without delayEulbevoli Eulbevoli 40A AC-AC Solid State Relay Module Start from Zero Volt, CE Certified for Home Automation with LED Light Displ 【EFFICIENT PERFORMANCE】Provides reliable dual-way SCR input with zero starting voltage and Ioff, along with Opto-isolatoIndependently published Optoelectronics Journal: Blank, Lined Notebook (Softcover) GLOGLOW GLOGLOW Solid State Relays Relay AC to AC 90 to 250VAC Input 24 480V Output LED Indicator for Single Phase Industrial Co 【40A Relay Setup】40A relay for load control with LED work indicator for real time status check. Plastic and metal housinNewnes Analog Circuits Cookbook Used Book in Good ConditionViaGasaFamido ViaGasaFamido 40A Solid State Relay Module, Plastic Metal AC AC Input 90-, Control Relay 24-480V for Industrial Automati [High Power Capability]Handles up to 40A load current efficiently for industrial automation applications.Shurzmotic FX1N - 14MR PLC Industrial Programmable Control Board, Relay Output PLC Controller Module, 24V DC Industrial Automation Advanced Anti-Interference Protection: This FX1N-14MR PLC industrial programmable control board features a robust anti-iJspondivague FX1N - 14MR PLC Industrial Programmable Control Board, Relay Output PLC Controller Module with 8 Input 6 Output Points, Advanced Anti-Interference Design: The FX1N-14MR PLC industrial programmable control board uses an industrial-grade 32-b