High-efficiency converter for light-rail and industrial applications

Powerbox has launched its new high-efficiency 750VDC input DC-DC converter for light-rail and industrial applications. The switching stage of the new PRBX ENR500D is based on an enhanced resonant topology delivering a high efficiency of 95% typical over the low to high load range. Created for railway applications, the device fulfils the stringent standard EN 50124-1 and provides full performance across the temperature range of -40C to +70C. The device shortens time-to-market when a custom solution is needed.

The company designers have designed the platform that is built on a resonant topology combined with the latest MOSFET technology and the usage of high-performance magnetics. The device is created to comply with the EN 50124-1 standard and for the so-called Pollution Degree 2 such as control cabinets in the driver’s cabin or passenger compartments. The device has ingress protection to IP20, and input to output double reinforced isolation. The unit complies with EMC emissions and immunity as specified in both EN 50124-1 and EN 50124-5.

In accordance with EN50124-1, rated impulse voltage of 4.4kV, the input to output provides a double reinforced insulation of 1000V, with a clearance 8mm, creepage ISO Class I and 10mm, ISO Class II 14.2mm.

In railway applications, robustness is crucial, and the converter is enclosed in an aluminium chassis with an integral heatsink. It measures 163mm x 230mm x 80mm and has an ingress protection level of IP20. For reliability and availability, all PCBs have a protective coating.