Recom 1W Dual Output DC to DC Converters – RA/RB Series – Recom RB-2405S/HP, The Recom RB-0505D is A 1W Unregulated dual output DC/DC converter. It has been designed for isolating or converting DC power rails in general purpose applications. Although low cost, it does not compromise on features and offers 1KV DC isolation, a -40°C to +85°C operating temperature range and industry standard pin-out. Recom RB-2405S/HP