OS5RPM7331A is an optoisolated 5-12Vdc, 7.5A, 3-channel relay module from Optosupply. It features three independent 10A relays, opto-isolated from each other and from the driver circuitry to help reduce noise and improve system stability. The module is versatile with energize-to-open or energize-to-close operation settings, and can be used with a wide range of contacts, such as N/O, N/C, etc. Operating voltage range is 5-12Vdc, and maximum current is 7.5A. The module has RoHS and CE certifications and is compatible with many AC and DC circuits.