ASI manufactures a replacement line of D diodes originally made by Alpha. Theses D diodes are primarily detector/mixer diodes.

For DH257-04 key parameters, see the part table below. For details about parts other than DH257-04 click on the desired part number in the parts list at the bottom of this page.

Looking for a part number different than the one found in the table above? For another part in the same part family, see the list below. For other part families, enter the part number into the Part Finder Search above.