Datasheet

Aluminium Electrolytic Capacitors
6
3.8 ESR
The equivalent series resistance represents the losses of a capacitor (the resistance of the foil, electrolyte, terminals).
The ESR depends on frequency and temperature.
3.9 ESL
The equivalent series inductance represents the inductive part of the capacitor (leads, foil). The ESL depends mainly on
the frequency.
3.10 Dissipation factor tan (DF)
The dissipation factor is defined as the power loss of the
capacitor divided by the reactive power of the capacitor.
tan = ESR * *C
S
In general the DF is measured at 100 Hz and 20 °C.
3.11 Impedance Z
The impedance of the capacitor is given by the ESR, ESL and the capacitance.
The impedance depends on the temperature and the frequency. The Impedance is normally measured at 10 kHz.
4. Mounting
Position for screw terminal capacitors
Upright position is recommended to prevent electrolyte leakage in case of vent opening.
Horizontal mounting is also possible but the vent must faces upwards.
Terminals / Mounting stud
These maximum torque values should not be exceed:
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Equivalent circuit of an electrolytic capacitor
- simplified -
ESR
ESL
C
S
Screw thread
Maximum torque in Nm
M4
2,0
M5
2,0
M6
2,5
M8
4,0
M12
10,0