Electrical specification and ordering codes
R
25
Ω
No. of R/T
characteristic
B
25/100
K
Ordering code
1 k 1011 3730 ±3% B57045K0102K000
2.2 k 1013 3900 ±3% B57045K0222K000
4.7 k 4001 3950 ±3% B57045K0472K000
6.8 k 2903 4200 ±3% B57045K0682K000
10 k 2904 4300 ±3% B57045K0103K000
33 k 1012 4300 ±3% B57045K0333K000
47 k 4003 4450 ±3% B57045K0473K000
68 k 2005 4600 ±3% B57045K0683K000
100 k 2005 4600 ±3% B57045K0104K000
150 k 2005 4600 ±3% B57045K0154K000
Reliability data
Test Standard Test conditions ∆R
25
/R
25
(typical)
Remarks
Storage in
dry heat
IEC
60068-2-2
Storage at upper
category temperature
T: 125 °C
t: 1000 h
< 3% 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
< 3% No visible
damage
Endurance P
max
: 450 mW
t: 1000 h
< 3% No visible
damage
Long-term stability
(empirical value)
Temperature: 100 °C
t: 10000 h
< 5% No visible
damage
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 B57045K
Probe assemblies K45
Page 3 of 14Please read Cautions and warnings and
Important notes at the end of this document.
