100W Fully encapsulated RIA12 Railway DC-DC converters offer 3.5xVn input surge withstand capacity

Converters provide protection for on-board equipment and systems against the effects of surges, transients and EMI

100W, fully encapsulated DC-DC converters with RIA12 protection

Fully encapsulated railway DC-DC converters meet requirement of RIA12 and EN50155

The RWR 100R-P99 series is a recent addition to our line of fully encapsulated RIA12 DC-DC converters designed for railway environments. The units have an input voltage surge withstand capacity at 3.5 times the nominal input voltage for 20 milliseconds and meet the requirements of RIA12 with wide margins. RIA12 is the general specification for protection of traction and rolling stock equipment from transients and surges in DC control systems. The converters meet the requirements of EN50155. They 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) and EN61000-4-6 (Conducted Immunity). Other protection includes 3000Vdc input-output isolation, overload protection, thermal protection and current limiting.

The 100W railway converters deliver a single, regulated output of 12Vdc, 24Vdc, 48Vdc or 110Vdc. They accept wide input ranges including 15-34V (24Vdc nominal), 29-67V (48Vdc), 43-101V (72Vdc) or 66-154Vdc (110Vdc). Custom input and output voltages are available. Regulation is better than 1% from no load to full load across all line and load conditions. Efficiency depends on input/output configuration and is typically is 85% at full load. Other output power levels are also available, including a 30W and 50W version.

The units are fully encapsulated with a thermally conductive MIL-grade silicon rubber compound with a UL94V-0 flammability rating. They also meet MIL-810C, D. Encapsulation ensures protection from high levels of 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 without derating.

The railway converters are housed in robust, encapsulated P99 type chassis measuring 81 x 66 x 156 mm.

ABSOPULSE Electronics is an original equipment manufacturer of an extensive range of railway and industrial quality 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 designs or any of your power conversion requirements, get in touch with us.

Key Specifications

  • 100W, Railway quality dc-dc converters – EN50155 compliant;
  • RIA12 input voltage withstand capacity (3.5Vn for 20 ms);
  • EMI: EN50121-3-2;
  • Input: 24Vdc, 36Vdc, 48Vdc, 72Vdc, 96Vdc, 110Vdc (wide EN50155 ranges);
  • Output: 12V, 24V, 48V or custom;
  • Line/load regulation: ±1% combined from no load to full load;
  • Cooling: conduction and natural convection;
  • -40°C to +70°C operating temperature range for full specification;
  • P99 enclosure: 81 x 66 x 156 mm (3.2″ x 2.6″ x 6.2″).

Generic Data sheet – RWR 100R-P99 railway DC-DC converter

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