The AHV Series of DC/DC converters are designed to replace the AHE/ATO family of converters in applications requiring compliance to MIL-STD-704A through E, in particular the input surge requirement of 80 volts specified to withstand transient input voltage of 80 volts. No input voltage or output power derating is necessary over the full military temperature range. These converters are packaged in an extremely rugged, low profile package that meets all requirements of MIL-STD-883 and MIL-PRF-38534. Parallel seam weld sealing and the use of ceramic pin feedthru seals assure long term hermeticity after exposure to extended temperature cycling.