Which optical splitter package is similar in appearance and size to a standard fusion splice protector?

The optical splitter package that resembles a standard fusion splice protector in appearance and size is the FBT, which stands for Fused Biconical Taper. FBT splitters are commonly used in fiber optic networks, and their compact and cylindrical design allows them to be easily integrated into existing setups that use fusion splicing. Their similar size to splice protectors simplifies deployment and maintenance in a network environment, as they can occupy similar enclosures and be handled with comparable techniques.

Other options do not share this specific similarity. The SC Connector and LC Package are primarily connector types that are designed for specific termination methods rather than for splitting signals like an FBT splitter. The MPO Package refers to a multi-fiber connector that supports multiple optical fibers but does not resemble the compact splice protector form factor. Therefore, FBT splitters are uniquely suited to match the characteristics outlined in the question.