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REF3425: Maximum reflow temperature

Part Number: REF3425

The datasheet shows a lower maximum reflow temperature for the REF3425 than the other options in the same table. Considering specs and package being very similar, why is that difference? 

Orderable Device Status
(1)
Package Type Package
Drawing
Pins Package
Qty
Eco Plan
(2)
Lead/Ball Finish
(6)
MSL Peak Temp
(3)
Op Temp (°C)
REF3425IDBVR ACTIVE SOT-23 DBV 6 3000 Green (RoHS
& no Sb/Br)
CU NIPDAU Level-2-250C-1 YEAR -40 to 125
REF3430IDBVR ACTIVE SOT-23 DBV 6 3000 Green (RoHS
& no Sb/Br)
CU NIPDAU Level-2-260C-1 YEAR -40 to 125
REF3433IDBVR ACTIVE SOT-23 DBV 6 3000 Green (RoHS
& no Sb/Br)
CU NIPDAU Level-2-260C-1 YEAR -40 to 125
REF3440IDBVR ACTIVE SOT-23 DBV 6 3000 Green (RoHS
& no Sb/Br)
CU NIPDAU Level-2-260C-1 YEAR -40 to 125
REF3450IDBVR ACTIVE SOT-23 DBV 6 3000 Green (RoHS
& no Sb/Br)
CU NIPDAU Level-2-260C-1 YEAR -40 to 125