Help me find a component based on its label
This is a Vishay part (logo at the bottom).

The marking tells us:


marking band: unidirectional type
1st line: 200A -> google 200A vishay diode turns up: datasheet
2nd line: 06A -> datecode: 2010, June in factory A (wherever that is)


Another hint to support this finding is the component name on the board. TRSB is an abbreviation for transorb diode which is a transient voltage suppressor, so we probably found the right thing.

Conclusion: It's a P4SMA200A. For purchase of this type have a look at Vishay distributors which are available in your region.