ABSOPULSE Electronics’ RWR 155 series of fully encapsulated, ultra-rugged, railway quality DC/DC converters deliver up to 150W output power. They meet the requirements of EN50155 and, with an input voltage surge withstand capability of 385VDC for more than 1s (3.5Vn for 20ms minimum), also meet RIA12.
The converters accept 24, 36, 48, 72, 96 or 110VDC with wide EN50155 input ranges and deliver a single output of 12, 24, 48 or 110VDC. Regulation is 1% from no load to full load across all line and load conditions. The RWR 155 units are fully encapsulated in a thermally conductive MIL-grade silicon rubber compound with a UL94V-0 flammability rating.
They also meet environmental criteria stipulated in MIL-810C, D, with protection from high levels of shock and vibration, moisture, salt, fog and other contaminants. Cooling is by conduction via base plate to a heatsinking surface. The units operate over a temperature range from -40 to +70°C for full specification (no derating). The compact railway converters measure 108x70x191mm.