New 50W, 750Vdc high input voltage railway DC-DC converter delivers high conversion efficiency, high power density, high MTBF


Railway DC-DC converter employs the latest silicon carbide (SiC) semiconductor technology to deliver high conversion efficiency and high power density

50W High input voltage railway DC-DC Converters operate from 750Vdc (525V to 975Vdc range), the traction voltage for mass transit vehicles and mining locomotives, and offer high input surge withstand capacity of 1300Vdc.

50W high input voltage (750Vdc) railway DC-DC converter employs the latest silicon carbide (SiC) semiconductor technology to deliver high conversion efficiency, high power density and high reliability.

The HVI 41R-F1 is a 50W addition to our line of high input voltage railway quality DC-DC converters. The converter employs the latest silicon carbide (SiC) semiconductor technology to deliver high conversion efficiency, high power density and a smaller form factor than similar designs of the same output power – the units measure 114 x 51 x 201 mm.

750Vdc input railway DC-DC converter with high input surge withstand capacity (1300V) is suitable for railway traction control systems and similar railway rolling stock applications

The HVI 41R-F1 railway DC-DC converter operates from a high input voltage of 750Vdc (525V to 975Vdc), which is the traction voltage required for mass transit vehicles including trams, metros, light rail and mining locomotives.  The unit is also suitable for running auxiliary equipment on trolleybuses.  Input surge withstand capacity is 1300Vdc. The unit delivers 24Vdc/2A regulated output. Custom input/output voltages are available to meet your application requirements.

Optoless design contributes to long operating life, high MTBF

The HVI 41R-F1 railway DC-DC converter is designed and built for an operating life of up to 30 years. The design eliminates optocouplers from the feedback loop and a significantly reduces component count, which contributes to an MTBF that is significantly higher than conventional designs.

All critical components on the primary side are designed and tested for corona inception levels that are significantly higher than the operating voltages. The design is verified for 5600Vdc input to output isolation and production level testing is 5000Vdc input to output; this isolates equipment from the supply and contributes to high reliability and long operating life of the unit.

Other electronic protection includes inrush current limiting, reverse polarity protection, output current limiting with short-circuit protection. Large design headroom, and the exclusive use of components with established reliability also contribute to ensuring that the railway converter delivers many years of trouble-free operation.

Meets requirements of EN 50155

The HVI 41R-F1 railway DC-DC converter meets the stringent requirements of EN 50155 for electronic equipment used on rolling stock. Heavy filtering on the input and output ensures compliance with EN 50121-3-2. They also meet EN 61000-4-2 (ESD), EN 61000-4-3 (RF Immunity), EN 61000-4-4 (Fast Transients), EN 50155 (Surge), EN 61000-4-6 (Conducted Immunity) EMI: EN50121-3-2 and EN 50155 (Voltage Variations). Please ask us about compliance to any other standards that you require.

Cooling by conduction and natural convection, fan-less  

The 50W converter is cooled by conduction via baseplate. Additional cooling is achieved by natural convection through the cooling slots. No fan cooling is required. This enables operation over a -25°C to 55°C temperature range for full specification. Wider temperature ranges are also available on request.

Rugged mechanical construction

The HVI 41R-F1 is ruggedly constructed and is designed to withstand high levels of shock and vibration (IEC 61373 Cat 1 A&B), which ensures reliable operation in extreme environments. The internal board is conformal coated for immunity to moisture, humidity and airborne contaminants.

The chassis-mountable enclosure is also available in DIN-rail format.

Customized and fully custom designs

ABSOPULSE Electronics is an original equipment manufacturer (OEM) specializing in the design and manufacture of an extensive range of custom railway and industrial quality power conversion solutions. All existing designs can be modified to meet your application requirements.

Key Specifications

  • 50W railway quality converter;
  • Employs latest silicon carbide (SiC) semiconductor technology;
  • No optocouplers, low component count;
  • Very high reliability – MTBF min. 160,000 hours at 45°C;
  • Meet EN 50155 for railway equipment used on rolling stock;
  • Input: 750Vdc nominal (525V-975Vdc operating range);
  • Input surge withstand capacity: 1300Vdc;
  • Wide input ranges (EN 50155);
  • Output: 24V/2A or custom;
  • High input/output isolation;
  • Line/load regulation: ±2% combined from zero load to full load;
  • EMI: EN 50121-3-2 and EN 55032 Class A;
  • Cooling by conduction and natural convection;
  • -25°C to +55°C operating temperature range;
  • F1 chassis: 114 x 51 x 201 mm (4.5″ x 2″ x 7.9″) W x H x D.

Data sheet – HVI 41R-F1 DC/DC converter (Railway)

Your requirements – Request a Quotation

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