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APC SMT3000RMI2U mosfet burned

APC UPS Data Center Backup Solutions Forum

Schneider Electric support forum for Data Center UPS, software and services including our APC offers designed to share knowledge, installation, configuration, and general product use.


APC SMT3000RMI2U mosfet burned

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.


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