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Fafeicy YYG-2 30A One Way Relay Module, 30A Relay Module High Power One Way High/Low Level Trigger Optocoupler Isolation Relay Module (DC5V): Amazon.com: Industrial & Scientific
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2 Channel DC 5V 12V 24V 30A Relay Module with Optocoupler Isolation High Low Trigger Switch for Smart Home PLC Control - AliExpress
Amazon.com: KNACRO 1-Channel 30A High Current 24V Contactor Relay Switch Power Switch DC Power Switching Control Board Module Electrical Relay switches for Cooler Heater Refit Water Heater Control(DC 24V) : Electronics
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