B57020M2502A001 Datasheet, PDF (3/9 Pages) TDK Electronics – NTC thermistors for temperature measurement

Temperature measurement
Probe assemblies
B57020M2
M2020
Reliability data
Test
Storage in
dry heat
Standard
IEC
60068-2-2
Storage in damp IEC
heat, steady state 60068-2-78
Storage in coldness
Rapid temperature IEC
cycling (in air)
60068-2-14
Storage in water
Temperature
cycling test
Voltage proof test
Insulation test
Test conditions
∆R₂₅/R₂₅
(typical)
Storage at upper
< 2%
category temperature
T: 80 °C
t: 1000 h
Temperature of air: 40 °C
Relative humidity of air: 93%
< 2%
Duration: 56 days
Storage at lower
< 2%
category temperature
T: 40 °C
t: 1000 h
Lower test temperature: 40 °C
Upper test temperature: 80 °C
Time to change from lower to
< 2%
upper temperature: <30 s
Number of cycles: 1000
Medium: air
Temperature of water: 30 °C
t: 4000 h
< 2%
Applied voltage with drop resistor
10 kΩ: 10 V DC switched
between on (t_on = 30 min) and
off (t_off = 30 min)
Lower test temperature: 30 °C < 2%
Upper test temperature: 10 °C
Test frequency <15 min under
wetness and frozen water
Number of cycles: 50000
Medium: air
3750 V AC,
1 min
The sensors are placed in a
vessel containing metallic balls of
1 mm diameter (with total
immersed head). The applied
voltage is 500 V DC.
Remarks
No visible
damage
No visible
damage
No visible
damage
No visible
damage
No visible
damage
No visible
damage
No flashover
Above
1000 MΩ
Please read Cautions and warnings and
Important notes at the end of this document.
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