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Proper part number of this diode

I've included a picture of the SMD diode I'm trying to find maybe someone knows ST part numbers better than I. Possible it's a discontinued part but you would think something would pop up on an internet search but nothing. I need these little guys to...

"STP6N120K3" parts power dissipation and RθJB

Hi,I would like to know the power dissipation of "STP6N120K3" under normal operating conditions or the formula to calculate PD and its "Thermal resistance between Junction to Board (°C/W) -RθJB" which is not specified in the datasheet.

VA.7 by Associate
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Unstable X-NUCLEO-IDW01M1

I purchased several X-NUCLEO-IDW01M1 expansion boards. Some boards operate normally, while others reset approximately every 3 seconds and do not operate normally. I don't know if it will help but attach the log.

shk by Associate II
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Comunucation serial 485

I have comunucation 485 when start the aplication after 10s begin error "FE"​.Baudrate1152008bitsNine paratyI use transiver maxin 485 and pin "DE" by hardware.​

FSant.18 by Associate II
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