DG suffix in STMicroelectronics part numbers is calling out “Dual Gauge” and this is referring to having a thicker heat sink. A link is below showing an example of these part numbers:
Here is the STMicro Product Change Notice that explains why the manufacturer made the change. Basically, it improved their own process: [click here 4857.pdf (172.5 KB) ]. Document name = PCN APM-SLI/09/4857
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