Film Capacitors – Power Electronic Capacitors
MKP DC
B2562*
Maximum operating temperature Θmax
Highest permitted capacitor temperature during operation, i.e. temperature at the hottest point of the case.
Hot-spot temperature Θhs / Ths
Temperature zone inside of the capacitor at hottest spot.
Tangent of the loss angle of a capacitor tan δ
Ratio between the equivalent series resistance and the capacitive reactance of a capacitor at a specified
sinusoidal alternating voltage, frequency and temperature.
Series resistance Rs
The sum of all Ohmic resistances occurring inside the capacitor.
ESR
ESR (Equivalent Series Resistance) representing entire active power in capacitor.
tan δ
ω ⋅C
tan δ0
ω ⋅C
ESR =
= Rs +
Thermal resistance Rth
The thermal resistance indicates by how many degrees the capacitor temperature at the hot spot rises in relation
to the dissipation losses.
Maximum power loss Pmax
Maximum permissible power dissipation for the capacitor’s operation.
Θhs − ΘA
Pmax
=
Rth
Self inductance Lself
The sum of all inductive elements which are contained in a capacitor.
Resonance frequency fr
The lowest frequency at which the impedance of the capacitor becomes minimum.
1
fr =
2π⋅ Lself ⋅CR
FILM R&D / FILM P PM
January 2013 – Version 8
Please read Cautions and warnings and
Page 7 of 20
Important notes at the end of this document.
EPCOS [ EPCOS ]
