2000 PIECES TBU-DB055-100-WH-Q BOURNS
6-DFN SMD 
550V 
BI-DIRECTIONAL OVERVOLTAGE SURGE PROTECTION
AUTOMOTIVE GRADE
6.6 x 5.5mm
ROHS FULL REEL
https://www.datasheetarchive.com/datasheet/TBU-DB055-100-WH-Q/Bourns?term=TBU-DB055-100-WH&version=1