Relay module with optocoupler-isolated relay outputs — available in 5V and 12V control options, and in 1, 2, 4, 6, and 8 channel configurations. The 4-channel 5V version is in stock and ready for immediate purchase. Key benefits Protects control electronics: optocoupler isolation separates the relay outputs from your control circuitry, reducing noise, interference, and the risk of damage. Reliable switching: mechanical relay outputs deliver dependable on/off switching for a wide range of loads and environments. Flexible deployment: multiple channel counts and two control-voltage options let you match the module to the scope and voltage of your project. Rapid availability: 4-channel 5V units are currently in stock for immediate use or deployment. Main features Control-voltage options: 5V and 12V variants to suit common control systems. Channel configurations: choose 1, 2, 4, 6, or 8 relay channels depending on application needs. Optocoupler isolation: provides electrical isolation and enhanced stability between control signals and relay outputs. Relay outputs: designed for reliable switching across typical application scenarios. Compatibility and performance Works with 5V and 12V control systems; select the version that matches your controller or PLC supply. Optocoupler isolation improves signal integrity and reduces the chance of control-side faults caused by switched loads. Suitable for projects that require dependable mechanical switching and electrical separation between control and load circuits. Typical use scenarios Home automation: switch lighting, fans, pumps, and other household devices from a 5V control board or home controller while isolating the control electronics. Prototyping and labs: add isolated relay channels to test rigs or development boards without risking interference or damage. Industrial control and machinery interfaces: provide isolated switching points when integrating external loads or legacy equipment with modern control systems. Order options Available configurations: 1, 2, 4, 6, and 8 channels. Control voltages: 5V and 12V. In stock now: 4-channel 5V model for immediate purchase.