R/T characteristics
R/T No.
1011 1012 1013
T (°C) B
25/100
= 3730 K B
25/100
= 4300 K B
25/100
= 3900 K
R
T
/R
25
α (%/K) R
T
/R
25
α (%/K) R
T
/R
25
α (%/K)
55.0 70.014 6.9 87.237 6.8 77.285 7.0
50.0 49.906 6.7 62.264 6.7 54.938 6.7
45.0 36.015 6.4 44.854 6.5 39.507 6.5
40.0 26.296 6.2 32.599 6.3 28.722 6.3
35.0 19.411 6.0 23.893 6.1 21.099 6.1
30.0 14.479 5.8 17.654 6.0 15.652 5.9
25.0 10.903 5.6 13.098 5.8 11.715 5.7
20.0 8.2923 5.4 9.8059 5.7 8.8541 5.6
15.0 6.3591 5.2 7.4266 5.5 6.7433 5.4
10.0 4.9204 5.1 5.6677 5.4 5.1815 5.2
5.0 3.8279 4.9 4.3213 5.3 4.0099 5.1
0.0 3.0029 4.8 3.3208 5.1 3.1283 4.9
5.0 2.3773 4.6 2.5842 5.0 2.4569 4.8
10.0 1.8959 4.5 2.0238 4.9 1.9438 4.6
15.0 1.5207 4.3 1.5858 4.8 1.5475 4.5
20.0 1.228 4.2 1.2507 4.7 1.2403 4.4
25.0 1.0000 4.1 1.0000 4.5 1.0000 4.3
30.0 0.81779 3.9 0.7964 4.4 0.81104 4.1
35.0 0.67341 3.8 0.64053 4.3 0.66146 4.0
40.0 0.55747 3.7 0.51772 4.2 0.54254 3.9
45.0 0.46357 3.6 0.41958 4.1 0.44727 3.8
50.0 0.3874 3.6 0.34172 4.1 0.37067 3.7
55.0 0.32368 3.5 0.27877 4.0 0.30865 3.6
60.0 0.272 3.4 0.22861 3.9 0.25825 3.5
65.0 0.23041 3.3 0.18872 3.8 0.21707 3.4
70.0 0.19604 3.2 0.15645 3.7 0.18323 3.3
75.0 0.16735 3.1 0.13012 3.6 0.15535 3.3
80.0 0.14342 3.0 0.10863 3.6 0.13223 3.2
85.0 0.12347 3.0 0.091115 3.5 0.11302 3.1
90.0 0.10668 2.8 0.0767 3.4 0.096951 3.0
95.0 0.092734 2.8 0.064867 3.3 0.083487 3.0
100.0 0.080903 2.8 0.055047 3.3 0.072139 2.9
105.0 0.070616 2.7 0.046797 3.2 0.062559 2.8
110.0 0.061826 2.6 0.039904 3.1 0.054425 2.8
115.0 0.054282 2.6 0.034255 3.1 0.047508 2.7
120.0 0.047793 2.5 0.029498 3.0 0.041594 2.6
125.0 0.042249 2.4 0.025448 3.0 0.036532 2.6
Temperature measurement B57045K
Probe assemblies K45
Page 4 of 14Please read Cautions and warnings and
Important notes at the end of this document.
R/T characteristics
R/T No.
2005 2903 2904
T (°C) B
25/100
= 4600 K B
25/100
= 4200 K B
25/100
= 4300 K
R
T
/R
25
α (%/K) R
T
/R
25
α (%/K) R
T
/R
25
α (%/K)
55.0 120.22 7.0 120.03 7.7 121.46 7.4
50.0 85.48 6.9 82.38 7.4 84.439 7.2
45.0 61.004 6.8 57.248 7.2 59.243 7.1
40.0 43.712 6.7 40.255 7.0 41.938 6.9
35.0 31.459 6.6 28.627 6.7 29.947 6.7
30.0 22.746 6.6 20.577 6.6 21.567 6.6
25.0 16.49 6.4 14.876 6.4 15.641 6.3
20.0 12.071 6.3 10.88 6.1 11.466 6.2
15.0 8.8455 6.1 8.0808 5.9 8.451 6.0
10.0 6.5446 6.0 6.0612 5.8 6.2927 5.9
5.0 4.8852 5.8 4.5649 5.6 4.7077 5.7
0.0 3.6781 5.6 3.4708 5.4 3.5563 5.5
5.0 2.7944 5.4 2.6625 5.2 2.7119 5.3
10.0 2.1391 5.3 2.0599 5.1 2.086 5.1
15.0 1.6507 5.1 1.6069 4.9 1.6204 5.0
20.0 1.2823 5.1 1.2631 4.8 1.2683 4.8
25.0 1.0000 5.0 1.0000 4.6 1.0000 4.7
30.0 0.78393 4.8 0.79593 4.5 0.7942 4.6
35.0 0.61822 4.7 0.63796 4.4 0.63268 4.5
40.0 0.49053 4.6 0.51467 4.2 0.5074 4.3
45.0 0.39116 4.5 0.41887 4.1 0.41026 4.2
50.0 0.31371 4.3 0.34272 4.0 0.33363 4.1
55.0 0.25338 4.2 0.28081 3.9 0.27243 4.0
60.0 0.20565 4.2 0.23141 3.8 0.2237 3.9
65.0 0.16762 4.1 0.19211 3.7 0.18459 3.8
70.0 0.13726 4.0 0.16027 3.6 0.15305 3.7
75.0 0.11279 3.9 0.13421 3.5 0.12755 3.6
80.0 0.093053 3.8 0.11288 3.4 0.10677 3.5
85.0 0.077177 3.7 0.095326 3.3 0.089928 3.4
90.0 0.064263 3.6 0.080828 3.2 0.076068 3.3
95.0 0.053678 3.6 0.068916 3.2 0.064524 3.3
100.0 0.044996 3.5 0.058989 3.1 0.054941 3.2
105.0 0.037917 3.4 0.050701 3.0 0.047003 3.1
110.0 0.032063 3.4 0.043735 3.0 0.040358 3.0
115.0 0.027161 3.3 0.037778 2.9 0.034743 3.0
120.0 0.023079 3.2 0.032736 2.8 0.030007 2.9
125.0 0.01968 3.2 0.028513 2.7 0.026006 2.8
130.0
0.022609 2.8
135.0
0.01972 2.7
140.0
0.017251 2.6
145.0
0.015139 2.6
150.0
0.013321 2.5
155.0
0.011754 2.5
Temperature measurement B57045K
Probe assemblies K45
Page 5 of 14Please read Cautions and warnings and
Important notes at the end of this document.
R/T characteristics
R/T No.
4001 4003
T (°C) B
25/100
= 3950 K B
25/100
= 4450 K
R
T
/R
25
α (%/K) R
T
/R
25
α (%/K)
55.0 88.052 7.3 103.81 6.8
50.0 61.65 7.0 73.707 6.7
45.0 43.727 6.8 52.723 6.6
40.0 31.395 6.5 37.988 6.5
35.0 22.802 6.3 27.565 6.4
30.0 16.742 6.2 20.142 6.2
25.0 12.367 6.0 14.801 6.1
20.0 9.2353 5.6 10.976 5.9
15.0 7.0079 5.4 8.1744 5.8
10.0 5.3654 5.4 6.1407 5.7
5.0 4.126 5.2 4.6331 5.5
0.0 3.2 5.0 3.5243 5.4
5.0 2.4986 4.9 2.6995 5.3
10.0 1.9662 4.7 2.0831 5.1
15.0 1.5596 4.6 1.6189 5.0
20.0 1.2457 4.5 1.2666 4.9
25.0 1.0000 4.4 1.0000 4.7
30.0 0.80355 4.2 0.78351 4.6
35.0 0.65346 4.1 0.62372 4.5
40.0 0.53456 4.0 0.49937 4.4
45.0 0.43966 3.9 0.40218 4.3
50.0 0.36357 3.8 0.32557 4.2
55.0 0.30183 3.7 0.26402 4.1
60.0 0.25189 3.6 0.21527 4.0
65.0 0.21136 3.5 0.17693 3.9
70.0 0.17819 3.4 0.14616 3.8
75.0 0.15089 3.3 0.12097 3.7
80.0 0.12833 3.2 0.10053 3.7
85.0 0.10948 3.1 0.083761 3.6
90.0 0.093748 3.0 0.070039 3.5
95.0 0.080764 2.9 0.058937 3.4
100.0 0.069842 2.9 0.049777 3.4
105.0 0.060455 2.9 0.042146 3.3
110.0 0.052498 2.8 0.035803 3.2
115.0 0.04574 2.7 0.030504 3.2
120.0 0.039972 2.7 0.026067 3.1
125.0 0.034984 2.6 0.022332 3.0
130.0
0.019186 3.0
135.0
0.016515 2.9
140.0
0.014253 2.9
145.0
0.012367 2.8
150.0
0.010758 2.8
155.0
0.0093933 2.7
Temperature measurement B57045K
Probe assemblies K45
Page 6 of 14Please read Cautions and warnings and
Important notes at the end of this document.

B57045K0103K000

Mfr. #:
Manufacturer:
EPCOS / TDK
Description:
Thermistor NTC 10K Ohm 10% 2-Pin Panel Mount Radial 4300K >= -3.5 Bulk
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union