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YXQ AC 220V/230V Coil Voltage PCB Power Relay 8 Pins DPDT 2NO 2NC MK2P-1: Amazon.com: Industrial & Scientific
NOYITO 2-Channel Micro USB Relay Module USB Smart Control Switch USB Intelligent Control Switch (2-Channel Micro USB): Amazon.com: Industrial & Scientific
Amazon.com: HiLetgo 4 Channel 24V Relay Module with OPTO-Isolated Support High and Low Level Trigger for PLC Automation Equipment Control : Industrial & Scientific
Timing Relay On Delay Function DC 24V & AC 24-240V Multi-Voltage Time Relay Delay Off Switch with 7 Function Choices: Amazon.com: Industrial & Scientific
Amazon.com: DC 5V/12V/24V Delay Timer Relay, Self-Locking Delay On Off Time Switch Super 555 Timer DC 5V/12V/24V (DC24V ) : Industrial & Scientific
Amazon.com: 24V-240V GRL8-01 Liquid Level Control Relay Water Level Controller 10A AC/DC : Industrial & Scientific
Electronics-Salon DIN Rail Mount 4 SPDT 10Amp Power Relay Interface Module, DC 24V Version.: Amazon.com: Industrial & Scientific
Amazon.com: HiLetgo 4 Channel 24V Relay Module with OPTO-Isolated Support High and Low Level Trigger for PLC Automation Equipment Control : Industrial & Scientific
DVRD Voltage Monitoring Relay DC 12V/24V/36V/48V Over-Voltage and Undervoltage Protector Relay(DC24V): Amazon.com: Industrial & Scientific