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Carlo Gavazzi launched the new DSF-PV Surge Arresters. Compact and DIN rail mounted, these devices protect the long-term investment of photovoltaic (PV) installations and feature Type 2 (Class C) protection from transient over-voltage due to indirect atmospheric discharge and switching actions. Special internal technology provides for backup protection enabling the DSF Series to be safe in the event of a short circuit, saving cost and space of fusing.