Nec B58944 Datasheet 2021 ((new)) Link

If you need a or similar technical reference. NEC B58944 D43256BGU-70Y BOSCH Auto ECU computer IC

The B58944 is a critical component for repairing damaged automotive ECU boards, specifically for engine drive functions. It is compatible with a wide range of Bosch and Honda control units, including: ME7.4.4, ME7.5, ME7.5.10, ME7.9.6, ME7.9.20. nec b58944 datasheet 2021

If you share the , pin count , and surrounding circuit (power supply, MCU, opto, etc.), I can likely identify the real NEC part family and point you to the correct datasheet. If you need a or similar technical reference

However, it is critical to note that NEC's part numbering convention in that era often used "B" prefixes for PNP transistors and "D" for NPN. The "58944" suggests a custom or semi-custom OEM (Original Equipment Manufacturer) part number. Therefore, the search often leads to confusion, as no unified public datasheet exists under that exact string. If you share the , pin count ,

It is a BJT (bipolar junction transistor), NPN type, based on all available measurements.

: A sturdy SOP28, built to withstand environments that would fry a modern smartphone.