Micropac optocouplers are designed for military, space, and satellite harsh environments. These optocouplers are hermetically sealed and built to the appropriate MIL-PRF-19500/486 or MIL-PRF-19500/548 standards. We offer radiation-assured, 4N49 space-qualified optocouplers that have been qualified by TID (100 kRads), Neutron (1E12 n/cm2), with on-going ELDRs testing beyond (50 kRads). These radiation-assured optocouplers are well suited to space missions where radiation exposure and optocoupler performance are required.