Splitter modules and optical component module mounting assemblies

A fiber optic module mounting assembly comprising:

• a surface defining an opening;
• a module holder comprising a mounting flange and a body defining a channel, the body having a cross-sectional shape closely corresponding to a cross-sectional shape of the opening defined by the surface, wherein the mounting flange contacts the surface;
• and
• a module comprising a housing and an optical component within the housing, at least a portion of the housing having first and second opposing sides and a flange-free cross-sectional shape closely corresponding to a cross-sectional shape of the channel of the module holder, wherein the module is configured to be received within the channel defined by the body of the module holder, wherein each of the first and second opposing sides of the portion of the housing slidably contact the channel;
• wherein rotation of the module relative to the surface is substantially prevented when the housing of the module is received within the channel defined by the body of the module holder.