Railway Standards  DC/DC Converter High Input Voltage

The HVI 300R Series rugged, single output DC/DC converter uses field-proven double-conversion topology to generate 300W output power.
It is a mature design with a proven track record in many applications. The unit is equipped with non-destructive reverse polarity protection on the input, surge protection and high-grade input/output filtering. The series is rated for operation over a -25 to 55°C temperature range without derating. It is cooled by natural convection. This model is ruggedized and conformal coated for immunity to shock, vibration, humidity, moisture, dust and insects. An optional redundancy diode allows parallel connection to achieve higher output power or N 1 redundancy. This chassis-mount design is optimized for low component count and high efficiency. The use of components with established reliability results in a high demonstrated MTBF.


  • Designed to rail standards EN50155 & EN50121
  • Wide input range 525 ~ 975vdc
  • Rugged design for on-board train applications
  • Convection cooled: No fans
  • Fully isolated input-output 4300VDC
  • Overvoltage protection
  • Overload and short circuit protection
  • MTBF > 130,000hrs
  • Specials input/output combinations on request
  • Any output from 24vdc ~ 130vdc possible


  • Output Voltage Special voltage outputs
  • Terminals Customer specified connectors
  • N 1 Redundancy Output redundancy diode & Alarm


ModelOutput ( A)Output ( V)Output ( A)Power (W)


Operating input voltage range750VDC ( 525 ~ 975 )
• Other voltages on request
Input ProtectionReverse polarity protection.Inrush current limiting Lower voltage than specified will not damage unit
Output VoltageSee  table
RegulationLine: ±1%
Load: ±2%
Operating Temp: -25°C to +55°C at full load.
70°C cold plate temperature
EfficiencyModel dependent , typically 80%
Dynamic ResponseMax ±5% diviation for 10% – 50% load step wuth 1msec recovery
MTBF>130,000 hrs

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