400W Rugged, Conduction Cooled AC / DC Power Supply Operates in Railway and Other Harsh Environments
28 June 2005
The POL 400 is a recent addition to Absopulse Electronics’ POL series of field-proven, conduction cooled AC/DC power supplies. This high-density unit provides a complete 400W power solution in a compact 1.9in x 4.5in x 9.13in enclosure and weighs 2.2kg.
Full encapsulation with a thermally conductive MIL-spec silicon rubber compound ensures immunity to shock, vibration, humidity, moisture, dust and insects. Base plate conduction cooling allows for operation to full specification in a -40°C to +70°C cold-plate temperature range. EMI performance meets the requirements for EN55022 Class B. These features contribute to making the POL 400 suitable for EMI sensitive, harsh-environment applications.
This rugged power supply delivers 12VDC / 33A, 24DC / 17A, 36VDC / 12A or 48VDC / 9A. It operates from a switch selectable AC-power source of 115VAC / 230VAC at 47Hz to 440Hz or a DC-input range of 250VDC to 370VDC.
The POL 400 is designed to meet EN 60950 and related standards. The unit features inrush current limiting and surge protection on the input. Output protection includes current limiting with short-circuit protection and thermal shutdown with automatic recovery in case of continuous overload. Combined line and load regulation are ±1% from no load to full load. Efficiency is a minimum of 80%.
