Data Sheet

Mounting instructions
1 Soldering
1.1 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 Iron soldering
Bath temperature max. 260 °C max. 360 °C
Soldering time max. 4 s max. 2 s
Distance from thermistor min. 6 mm 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 Bath temperature (°C) Dwell time (s)
SnAg (3.0 ... 4.0), Cu (0.5 ... 0.9) 245 ±3 3
1.1.1 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 Bath temperature (°C) Dwell time (s)
SnAg (3.0 ... 4.0), Cu (0.5 ... 0.9) 260 5 10
Inrush current limiters B57237
ICLs S237
Page 8 of 15Please read Cautions and warnings and
Important notes at the end of this document.