Rectifier diode provides high temperature rating

As part of IXYS UK’s ongoing optimisation of its rectifier diode portfolio the maximum voltage rating for the W2624 series diode has been increased from 2,500-2,800V. This increase in voltage has been achieved without compromising the average current rating which remains at 2624amps at a heat sink temperature of 55°C. The diode has a surge rating of 30.8 kiloamperes and a maximum junction temperature of 160°C.

The device comprises a 50mm diameter silicon die bonded onto a metal disc packaged in an industry standard outline, fully hermetic ceramic package. As well as the established 26mm thick package, the diode is now also offered in a slim line 21mm thick package. The convolutions in the ceramic of the new thinner package option retain the longer creepage distance often required in traction applications and harsh industrial environments.

“The new thinner package option is compatible with standard outlines which are no longer available from the OEMs and offers a better solution for better performance in high power systems in the market, without the need to change any of the mechanical parts,” commented Frank Wakeman, IXYS UK’s Marketing and Technical Support Manager. “It is our continuing strategy to offer more power in smaller packages thus reducing material costs and weight.”

As standard, the device is available in two voltage classes and the two package thicknesses as outlined above. Part number designations for the expanded range of rectifier diodes are: for the thicker 26mm package, W2624NC240 for a 2,400V part and W2624NC280 for a 2,800V part; for the new 21mm thick package W2624ND240 for a 2,400V part and W2624ND280 for a 2,800V part.

If required the diodes can be supplied pre-selected for parallel operation against a customer specific requirement. Consult factory for details.

Typical applications for this device include: track side rectifiers for DC operated light rail systems, rectifiers for DC locomotives, front end rectifiers and bridges for industrial applications, DC power supplies, utilities and chemical power supplies.