Inrush current limiters
ICLs
B57238
S238
Mounting instructions
1
1.1
Soldering
Leaded NTC thermistors
Leaded thermistors comply with the solderability requirements specified by CECC.
When soldering, care must be taken that the NTC thermistors are not damaged by excessive
heat. The following maximum temperatures, maximum time spans and minimum distances have
to be observed:
Dip soldering
Bath temperature
Soldering time
Distance from thermistor
max. 260
°C
max. 4 s
min. 6 mm
Iron soldering
max. 360
°C
max. 2 s
min. 6 mm
Under more severe soldering conditions the resistance may change.
Solderability
(test to IEC 60068-2-58)
Preconditioning: Immersion into flux F-SW 32.
Evaluation criterion: Wetting of soldering areas
≥95%.
Solder
SnAg (3.0 ... 4.0), Cu (0.5 ... 0.9)
1.1.1
Bath temperature (°C)
245
±3
Dwell time (s)
3
Resistance to soldering heat (test to IEC 60068-2-58)
Preconditioning: Immersion into flux F-SW 32.
Evaluation criterion: Leaching of side edges
≤1/3.
Solder
SnAg (3.0 ... 4.0), Cu (0.5 ... 0.9)
Bath temperature (°C)
260
5
Dwell time (s)
10
Please read
Cautions and warnings
and
Important notes
at the end of this document.
Page 8 of 15
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