VishayOne of the world's largest manufacturers of discrete semiconductors and passive components
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Products A-Z:Optocouplers:H11B1/H11B2/H11B3
H11B1/H11B2/H11B3 product information 
Optocoupler, Photodarlington Output, High Gain, with Base Connection
PDFH11B1/H11B2/H11B3 datasheet
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