KP464 ETC, KP464 Datasheet - Page 26

• Manufacturer Part Number: KP464
• Description: (KP460 - KP464) Polypropylene film foil capacitors
• Manufacturer: ETC

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Measuring the component temperature
A thermocouple must be attached to the capacitor body as
in Fig.27.
The temperature is measured in unloaded (T
maximum loaded condition (T
The temperature rise is given by
To avoid radiation or convection, the capacitor should be
tested in a wind-free box.
2001 Jun 22
144x12(halfpage)
Polypropylene film foil capacitors
Fig.27 Mounting the thermocouple.
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c
).
thermocouple
T
=
T
c
CBA765
–
T
amb
amb
) and
.
26
Application note and limiting conditions
To select the capacitor for a certain application, the
following conditions must be checked:
1. The peak voltage (U
2. The peak-to-peak voltage (U
3. The voltage pulse slope (dU/dt) shall not exceed the
4. The maximum component surface temperature rise
5. The maximum component surface temperature must be
6. The capacitance drift is influenced by the soldering
DC voltage (U
the maximum U
level.
rated voltage pulse slope in an RC-circuit at rated
voltage and without ringing. If the pulse voltage is lower
than the rated DC voltage, the rated voltage pulse slope
may be multiplied by U
voltage.
For all other pulses following equation must be fulfilled:
T is the pulse duration.
must be lower than the limits in Fig.26.
lower than 100 C.
conditions (see section “Soldering conditions” for more
details).
2
T
0
dU
------- -
dt
2
Rdc
dt
p-p
).
U
to avoid the ionisation inception
p
) shall not be greater than the rated
Rdc
Rdc
KP 460 to 464
and divided by the applied
p-p
dU
------- -
dt
) shall not be greater than
rated
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