Yes, OM3 (Optical Multimode 3) fiber optic cable is capable of supporting 10 Gigabit Ethernet (10G) transmissions. OM3 is a type of multimode fiber (MMF) that is commonly used for short to medium-distance data communication in local area networks (LANs), data centers, and other high-performance computing environments.

The OM3 fiber has a core diameter of 50 micrometers (µm) and is optimized for use with 850-nanometer (nm) wavelength lasers, which is a common wavelength for 10G Ethernet over multimode fiber. OM3 fiber is designed to support link lengths of at least 300 meters at 10 Gbps.

It's important to note that while OM3 can support 10G, there are other multimode fiber types, such as OM4 and OM5, that offer enhanced performance characteristics and are also capable of supporting 10G and higher data rates over longer distances. The choice of fiber type depends on factors such as the required data rate, link length, and the specific application or standard being followed.