Below is the description of various parameters of MTBF values:

MTBF degree is the temperature at which the product was used.

"Continuous" means that the process is continuous,

"Intermittent" means interrupted process (Power off during the night and during vacation).

The MTBF value of the module is calculated with the MTBF of all components used on the module.

"Nb Cpt missing" is the number of components for which we haven't the MTBF. (For example a resistor and a capacitor so 2 components)

"Nb Cpt missing Qty" is the number of components for which we haven't the MTBF. (The resistor is twice used and the capacitor also so the quantity of components missing is 4 )

Nb Cpt Total Qty is the total number of components used on the module. (341)

"Ratio Nb Cpt Missing Qty / Nb Cpt Total Qty" gives the ratio of MTBF missing in the MTBF calculated.

Released for:Schneider Electric India