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New to this. There're two parts in the image. I think one is a dual transistor and the other is a dual diode. But I couldn't pinpoint what they are.

And can someone explain why the last letter is rotated 90 degree?

enter image description here

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Your "MA" is a SOT363 dual NPN transistor, likely a MBT3904DW1. Your "A1" is also indeed a common anode dual diode in SOT23, likely a BAW56. The sideways letter on both packages is most likely a date and/or production code.

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