APC SMT3000RMI2U mosfet burned

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Hello everyone,

i have APC SMT3000RMI2u with running only 25% Load one server and 3 switches from last 3 years.

today my APC won’t power on its just on and off continuously with relay sound. I just opened and found from 16 mosfets FDP3651U 12 are burned and bursts.i checked battery is normal for mean time i replaced APC and new one is working fine.

however i want to replace mosfets or where can i find the spareparts of APC like a complete control main board or any replacement for FDP3651U because FDP3651U isn’t available in UAE 🇦🇪.

and last question what was the cause of burning mosfets there was no issue at all because as i mentioned I replaced apc the new one is working fine.

thanks

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APC SMT3000RMI2U mosfet burned

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