Reliability data
Test Standard Test conditions ∆R
25
/R
25
(typical)
Remarks
Storage in
dry heat
IEC
60068-2-2
Storage at maximum operating
temperature
T: 110 °C
t: 1000 h
< 2% No visible
damage
Storage in damp
heat, steady state
IEC
60068-2-78
Temperature of air: 40 °C
Relative humidity of air: 93%
Duration: 56 days
< 2% No visible
damage
Rapid temperature
cycling
IEC
60068-2-14
Lower test temperature: 20 °C
Upper test temperature: 90 °C
Dwell time: 15 s
Time to change from lower to
upper temperature: approx. 5 s
Number of cycles: 60000
Medium: ethyleneglycol/water
(metal head immersed to the
liquid medium up to the sealing)
< 2% No visible
damage
Storage in water Temperature of water: 80 °C
t: 1000 h
Applied voltage with drop resistor
3.9 kΩ: 5 V DC
(metal head immersed to the
liquid medium up to the sealing)
< 2% No visible
damage
Vibration
resistance
IEC
60068-2-6
Frequency range: 10 to 1000 Hz
Amplitude: 1.5 mm, 10 g
Duration: 3 x 4 h
< 2% No visible
damage
Voltage proof test 2500 V AC
1 s
No flashover
Note
Contact of NTC thermistors with any liquids and solvents shall be prevented. It must be
ensured that no water enters the NTC thermistors (e.g. through plug terminals).
Avoid dewing and condensation unless thermistor is specified for these conditions.
Temperature measurement B57301K
Probe assemblies K301-A003
Page 3 of 11Please read Cautions and warnings and
Important notes at the end of this document.
