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Amazon.com: 4 pcs DC 5V 1 Channel Relay Module Board Shield High/Low Level Trigger with Optocoupler : Industrial & Scientific
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Amazon.com: OMRON ELECTRONIC COMPONENTS G2R-1A-E-DC12 POWER RELAY SPST-NO 12VDC, 16A, PC BOARD : Industrial & Scientific
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Molence DIN Rail Mount 8 Channels G2R-1-E Relay, AC/DC 24V Control 8 SPDT 16A Pluggable Power Relay Module for PLC MCU: Amazon.com: Industrial & Scientific
GAEYAELE GRT8-M1 16A Multifunction Time Relay with 10 Function Choices AC/DC12V-240V Relay(GRT8-M1,AC/DC12V-240V): Amazon.com: Tools & Home Improvement
Molence DIN Rail Mount 8 Channels G2R-1-E Relay, AC/DC 24V Control 8 SPDT 16A Pluggable Power Relay Module for PLC MCU: Amazon.com: Industrial & Scientific