Fibre optic adaptor (duplex) type SC for multimode fibre connectors - detail specification. This second edition cancels and replaces the first edition published in 1999. It constitutes a technical revision and the modal condition for the measurement is harmonised with IEC 61300-1. The QC number that appears on the front cover of this publication is the specification number in the IEC Quality Assessment System for Electronic Components (IECQ 910005XX0003).