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

B57235

ICLs

S235

Page 8 of 15

Please read Cautions and warnings and

Important notes at the end of this document.