Values derived from standard operating conditions at $T_a = 25^\circ C$ unless otherwise noted.
The 2021 datasheet emphasizes the device's switching efficiency, a critical parameter for modern SMPS (Switched-Mode Power Supplies) and DC-DC converters. nec b58944 datasheet 2021
If you're unable to locate the 2021 version of the datasheet, the specifications are likely to remain similar, given that the component hasn't been updated or discontinued. However, always verify the information with a reliable source to ensure accuracy and compliance with your application's requirements. Values derived from standard operating conditions at $T_a
Supply-chain and obsolescence notes (2021 context) By 2021, supply-chain disruptions affected many semiconductor components; designers should verify lead times and consider multi-sourcing. Also verify whether NEC’s LED lines remained supported under successor companies; cross-reference manufacturer part numbers and authorized distributor availability before committing to a design. However, always verify the information with a reliable
Quality, compliance, and procurement considerations Manufacturers list compliance to RoHS and other environmental directives, plus any automotive-grade or AEC-Q certifications for variants intended for vehicles. Binning and traceability details help procure consistent color/flux parts; designers should specify required bins or request matched-bin reels for visible uniformity in assemblies.
Available via Worldway Electronics or Jotrin Electronics, which provide factory excess stock for repair workshops.