relay module with normally open contacts for reliable switching of loads up to AC 250V at 10A or DC 30V at 10A. SMD optocoupler isolation provides strong driving capability and stable performance, with a trigger current of about 5 mA. Fault tolerant design ensures safety: if the control line is broken, the relay will not move and the load remains deenergized. User friendly interface: all connections are available through direct connection terminal leads for easy wiring and quick integration. Compatibility and performance: suitable for controlling AC and DC loads within the stated voltage and current limits, while providing electrical isolation between the control side and the load. Use scenarios: Home automation: switch lighting or small appliances up to 250V AC, controlled from a microcontroller or smart hub with reliable isolation. Industrial control: drive small actuators, solenoids, or valves up to 10A, with robust drive and safe control isolation. DIY projects: breadboard or enclosure prototypes that require simple wiring, direct terminal connections, and dependable NO switching.