The MU Connector looks a miniature SC with a 1.25 mm ferrule. It is a popular connector type in Japan. MU is a small form factor SC. It has the same push/pull style, but can fit 2 channels in the same Footprint of a single SC. MU was developed by NTT.
Optical Connector is a reusable passive component which could be applied in fiber and Cable connection. They are widely used in ODF, ODN,PON etc. OMC manufactures many sorts of fiber connectors. Such as SC,LC,ST,FC,MU,MTRJ,E2000 ,MPO,MTP,SMA,DIN,D4 etc.
MU: TIA/EIA-604-3A, GR-326.NTT-MU, JIS and IEC.
Connector Repeatability: MM<0.2dB; SM <0.1dB