These rugged power supplies meet EN61373/IEC61373 shock and vibration standards; additional ruggedizing and conformal coating are available for operation in extreme environments. The series is filtered to meet EN 55022 Class A EMI with wide margins, and it is designed to meet EN 60950 and related standards. Protection features include inrush current limiting, surge and reverse polarity protection on the input. Output protection includes current limiting with short-circuit protection (no hiccup) and thermal shutdown with self-resetting. Efficiency is between 80% and 87%, depending on the output configuration.