UL60950-1. CB, CSA, UL recognised component. Operating temperature is without derating. MTBF to MIL-HDBK 217F (+25°C). Recom 1W SMD Single/Dual Output Unregulated Isolated DC-DC Converter - R1S ; R1D Series. Enclosed un-potted open frame type converters Full power at 100°C ambient temperature 1kVdc isolation voltage Short circuit protection High efficiency up to 84%