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Compact Stable Design: Small footprint solid state relay module with stable performance for reliable switching in tight spaces Four Independent Channels: 4 channel relay design allows separate control of multiple devices, simplifying wiring and connections Low Voltage Operation: Relay activates when terminal to power negative voltage is 0V or near 0V, ensuring sensitive control Multi Purpose Use: Suitable for PLC control systems, home intelligent automation, industrial equipment, and electronic projects DC to AC Switching: Each channel rated at 2A for switching low power DC signals to AC loads, expanding application flexibility