identification of diode

can anyone help me identifiy D11 diode on 400-sl16m-pwr pcb of Presonus studio live 16.0.2
Label says B4Y but i cannot find anything on it nor where to get it. Product is discontinued and cannot find any retailers to ship pcb to Slovenia

Thanks for any help.

Surface mount parts generally don't have any meaningful numbers on them, you need a service manual that (hopefully) will tell you what it is - and allow you to work out what to replace it with, from the schematic.

Thank you,
I was afraid of that duo to lack of presonus service manuals

Most SM parts seem to use 'in house' numbers, so no identification is possible.