NDP506B Datasheet
(NDP505 / NDP5060 N-Channel Enhancement Mode Power FET
Manufacturer: National Semiconductor (now Texas Instruments)
Download the NDP506B datasheet PDF.
This datasheet also includes the NDP505A variant, as both parts are published together in a single manufacturer document.
Note: The manufacturer provides a single datasheet file (NDP505A_NationalSemiconductor.pdf) that lists specifications for multiple related part numbers.