IEC 60950-1, EN 60950-1. 3. Traco 3W SIP Single/Dual Output Semi-regulated Isolated DC-DC Converter - TRA 3 Series. The TRA-3 Series is a family of 3W single/dual output semi-regulated DC/DC converters with a miniature design and input/output isolation. These Traco Power semi-regulated DC/DC converters are ideal for use within power drivers and circuits where unregulated DC/DC converters do not meet the input voltage range at load change. Semi regulated output (load) Highest power density 3W SIP converter Industry standard pinout High efficiency up to 89% I/O isolation voltage 1000 VDC Operating temperature range -40 to + 85 3 year product warranty