|
Tolerance is the permissible relative
deviation of the capacitance from the rated value, expressed
in per cent. The tolerance is to be measured at a temperature
of +20°C and is only valid at the time of delivery.
After a longer period of storage or
use, the tolerance can increase; but, according to standard
specification, it may never exceed twice the value measured at
the time of delivery.
The following delivery tolerances are
usual for wound capacitors:
±1%;
±2.5%; ±5%;
±10%;
±20%.
In the case of electrolytic capacitors for
which the largest possible capacitance matters, tolerances of
+100/-20% also occur.
Note: The tolerance (with
the exception of 20%) is usually clearly marked on the body of
the capacitor, in case of very small capacitor sizes, coding
or ciphers according to IEC 60062 are also
used. | 
