1.3 General notes on soldering
Permissible heat exposure loads on film capacitors are primarily characterized by the upper cate-
gory temperature T
max
. Long exposure to temperatures above this type-related temperature limit
can lead to changes in the plastic dielectric and thus change irreversibly a capacitor's electrical
characteristics. For short exposures (as in practical soldering processes) the heat load (and thus
the possible effects on a capacitor) will also depend on other factors like:
Pre-heating temperature and time
Forced cooling immediately after soldering
Terminal characteristics:
diameter, length, thermal resistance, special configurations (e.g. crimping)
Height of capacitor above solder bath
Shadowing by neighboring components
Additional heating due to heat dissipation by neighboring components
Use of solder-resist coatings
The overheating associated with some of these factors can usually be reduced by suitable coun-
termeasures. For example, if a pre-heating step cannot be avoided, an additional or reinforced
cooling process may possibly have to be included.
EPCOS recommendations
As a reference, the recommended wave soldering profile for our film capacitors is as follows:
B32932 ... B32936
AC applications (heavy duty series) / 305 V AC
Page 10 of 18Please read Cautions and warnings and
Important notes at the end of this document.
Body remperature should follow the description below:
MKP capacitor
During pre-heating: T
p
110 °C
During soldering: T
s
120 °C, t
s
45 s
MKT capacitor
During pre-heating: T
p
125 °C
During soldering: T
s
160 °C, t
s
45 s
When SMD components are used together with leaded ones, the film capacitors should not pass
into the SMD adhesive curing oven. The leaded components should be assembled after the SMD
curing step.
Leaded film capacitors are not suitable for reflow soldering.
For uncoated MKT capacitors with lead spacings 10 mm (B32560/B32561) the following mea-
sures are recommended:
pre-heating to not more than 110 °C in the preheater phase
rapid cooling after soldering
Please refer to EPCOS Film Capacitor Data Book in case more details are needed.
B32932 ... B32936
AC applications (heavy duty series) / 305 V AC
Page 11 of 18Please read Cautions and warnings and
Important notes at the end of this document.
Cautions and warnings
Do not exceed the upper category temperature (UCT).
Do not apply any mechanical stress to the capacitor terminals.
Avoid any compressive, tensile or flexural stress.
Do not move the capacitor after it has been soldered to the PC board.
Do not pick up the PC board by the soldered capacitor.
Do not place the capacitor on a PC board whose PTH hole spacing differs from the specified
lead spacing.
Do not exceed the specified time or temperature limits during soldering.
Avoid external energy inputs, such as fire or electricity.
Avoid overload of the capacitors.
The table below summarizes the safety instructions that must always be observed. A detailed de-
scription can be found in the relevant sections of the chapters "General technical information" and
"Mounting guidelines".
Topic Safety information Reference chapter
"General technical
information"
Storage conditions Make sure that capacitors are stored within the
specified range of time, temperature and humidity
conditions.
4.5
"Storage conditions"
Flammability Avoid external energy, such as fire or electricity
(passive flammability), avoid overload of the
capacitors (active flammability) and consider the
flammability of materials.
5.3
"Flammability"
Resistance to
vibration
Do not exceed the tested ability to withstand
vibration. The capacitors are tested to
IEC 60068-2-6.
EPCOS offers film capacitors specially designed
for operation under more severe vibration regimes
such as those found in automotive applications.
Consult our catalog "Film Capacitors for
Automotive Electronics".
5.2
"Resistance to vibration"
B32932 ... B32936
AC applications (heavy duty series) / 305 V AC
Page 12 of 18Please read Cautions and warnings and
Important notes at the end of this document.

B32933B3474M000

Mfr. #:
Manufacturer:
EPCOS / TDK
Description:
Film Capacitors FILM CAP X2 0.47uF 2 0% 305Vac LS 22.5mm
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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