Electronic – Help Identifying a component for PCB repair

component-selectiondiodesidentificationrepair

I'm helping a friend by attempting to repair this display PCB. It uses 24vac input and he accidentally hooked it up to 120vac.

I am trying to identify the two components in this picture under the burn marks. I'm pretty sure they are diodes but am looking for more specifics so that I can order replacements. Anyone able to direct me anywhere or know anything about the two components labeled MX 21A.

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Best Answer

MX is an SMD Code for TI's TVS protection diode that may withstand 48V

SMBJ48A The left side, DS1 vaporized some material.

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