MTBF of UP3043K-3

I would like to know the MTBF information of UP3043K-3 (Part No:10000895E) that is the power supply module for PortServer II.

regards,

The MTBF for the 10000895 PS II power supply is 50,000 hours.

Thank you.
My PortServers are running since 2001. Then I will make replacement plan next year.