250W, Dual Output Encapsulated RIA12 Railway DC-DC converters offer 3.5xVn surge withstand capacity

250W, Dual Output Encapsulated RIA12 Railway converters with 3.5xVn surge withstand capacity

250W, Dual Output Encapsulated RIA12 Railway converters with 3.5xVn surge withstand capacity

The RWR 252-P400 series of dual output, fully encapsulated RIA12 railway dc-dc converters deliver up to 250W. The converters meet the requirements of EN50155 for electronic equipment used on rolling stock.

With an input surge withstand capability of 3.5 times greater than the nominal input voltage for 20 milliseconds, the converters meet RIA12, the general specification for the protection of traction and rolling stock equipment from transients and surges in DC control systems.

Wide EN50155 input ranges include 14.4 to 34Vdc (24Vdc nominal), 22 to 51Vdc (36Vdc nominal), 29 to 67Vdc (48Vdc nominal), 43 to 101Vdc (72Vdc nominal), 58 to 135Vdc (96Vdc nominal) or 66 to 154V (110Vdc nominal). Outputs V1 and V2 each provide 12V, 24V, 36V, 48V or 125Vdc. Custom input and output voltages are available on request. The total output power is determined by the primary side current limiting; this power is shared by the outputs.

The railway dc-dc converters are equipped with heavy filtering on the input and output and comply with EN50121-3-2. They also meet EN61000-4-2 (ESD), EN61000-4-3 (RF Immunity), EN61000-4-4 (Fast Transients), EN61000-4-6 (Conducted Immunity) and EN45545. Other protection includes 3000Vdc input-output isolation,1000Vdc isolation between V1 & V2, reverse polarity protection, overload protection, thermal protection and current limiting.

The units are fully encapsulated with a thermally conductive MIL-grade silicon rubber compound with a UL94V-0 flammability rating. They also meet environmental criteria as stipulated in MIL-810C, D. Encapsulation ensures immunity to high levels of mechanical shock and vibration, moisture, dust, salt fog and other contaminants. Conduction cooling via base plate to customer heat-sink or chassis and encapsulation enable operation over a -40°C to +70°C temperature range for full specification – no derating is required.

ABSOPULSE Electronics is an original equipment manufacturer (OEM) of an extensive range of railway and industrial grade power conversion solutions. We specialize in fully custom solutions. All of our existing designs can also be modified to meet customer application requirements.

To discuss these inverter designs or any of your power conversion requirements, get in touch with us.

Key Specifications

  • Railway quality dc-dc converters – EN50155 compliant;
  • RIA12 input voltage withstand capacity (3.5Vn for 20 ms);
  • Full encapsulation (thermally conductive MIL grade potting compound);
  • Input: 24Vdc, 36Vdc, 48Vdc, 72Vdc, 96Vdc, 110Vdc (EN50155 ranges) ;
  • V1 output: 12V, 24V, 36V, 48V, 125Vdc or custom;
  • V2 output: 12V, 24V, 36V, 48V, 125Vdc or custom;
  • Line/load regulation:
    V1: ±1% combined from 10% load;
    V1: ±3% from 10% load to full load;
  • EMI: EN50121-3-2;
  • Cooling: conduction and natural convection;
  • -40°C to +70°C operating temperature range for full specification;
  • P400 enclosure: 131 x 76 x 232 mm (5.2″ x 2.6″ x 9.2″)

Generic Data sheet – RWR 252-P400 Railway DC-DC Converter

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