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TL431-Q1: TL431-Q1 vs TL431

Genius 4700 points
Part Number: TL431-Q1

1.Please let us know the difference between TL431BQDBZRQ1 and  TL431BQDBZR.

   Does these part use same die ? 

   Only Automotive Qualification ?

2.We found the difference of ESD rating between these 2item.

Please let us the reason why this difference is.