B32671L datasheet(31/39 Pages) EPCOS

31 / 39 page

1.3

General notes on soldering

Permissible heat exposure loads on film capacitors are primarily characterized by the upper cate-

gory temperature Tmax. 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.

Recommendations

As a reference, the recommended wave soldering profile for our film capacitors is as follows:

B32671L, B32672L

High V AC, high temperature (wound)

Page 31 of 39

Please read Cautions and warnings and

Important notes at the end of this document.

B32671L Datasheet(PDF) 31 Page - EPCOS