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Can't find any specs on this device (LT 6251 MBR10100CT or is it MBR|0|00CT or MBRI0I00CT). Can't find datasheet for it.
It's definitely a dual common-cathode Schottky barrier rectifier. Both Vishay and Diodes Incorporated have the device as "MBR10100CT", although neither uses the exact package marking as shown in the photo.
Required, but never shown