ABLIC Inc. IC REG CTRLR BUCK SOT23-5 S-8521D36MC-BXVT2U

The S-8521D36MC-BXVT2U is a product model code that likely represents a specific electronic device or component, however, without further information it's impossible to know exactly what it refers to. The characters in the code may indicate certain specifications or features of the product, such as its size, capabilities, or intended use. Additional research or consultation with the manufacturer would be necessary to obtain more detailed information about the S-8521D36MC-BXVT2U.