NMK 2W Single & Dual Output DC-DC Converters Murata Power Solutions NMK 2W Single and Dual Output DC-DC Converters feature an industrial temperature range from -40°C to +85°C and a 3kVDC isolation with 5V output minimum efficiency of 80% at 2W. Available in industry-standard SIP packaging, the converters offer a power upgrade path from the 1W NMV Series. No heatsink is required with the NMK Series. Murata Power Solutions NMK 2W Single and Dual Output DC-DC Converters are UL 60950 recognized and RoHS Compliant.