TL431: What difference between TL431QDBZR and TL431AQDBZR

Part Number: TL431

Hello Team,

My customer is asking What difference between TL431QDBZR and TL431AQDBZR series shunt regulator, we can find similar performance 431 with different prefix.

What's different between those series shunt regulator?

How customer select a proper solution for his application?

Please help to check whether the following two materials can be substituted for each other.

Thanks a lot.