150W DC-DC Converters for Rail Applications

Absopulse Electronics' new 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 >1 second (3.5Vn for 20msec min.), they also meet RIA12. The converters accept 24Vdc, 36Vdc, 48Vdc, 72Vdc, 96Vdc or 110Vdc with wide EN50155 input ranges, and deliver a single output of 12Vdc, 24Vdc, 48Vdc 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 heat sinking surface. The units operate over a -40 to +70 degrees C temperature range for full specification (no derating). The compact railway converters measure 108 x 70 x 191 mm.