NTC thermistors for
temperature measurement
SMD NTC thermistors
with nickel barrier termination,
case size 0402
Series/Type:
B572**V
Date:
March 2006
EPCOS AG 2006. Reproduction, publication and dissemination of this publication, enclosures hereto and the
information contained therein without EPCOS' prior express consent is prohibited.
1) Depends on mounting situation
Applications
Temperature measurement and
compensation in
mobile phone applications
(e.g. battery pack, TCXO, LCD)
data systems
automotive electronics
Features
Multilayer SMD NTC with inner electrodes
Excellent long-term ageing stability in
high-temperature and high-humidity
environment
Superior resistance stability during soldering
(change <1%)
Options
Alternative resistance ratings, resistance
tolerance and B value tolerances available on
request
Delivery mode
Cardboard tape, 180-mm reel
Dimensional drawing
Dimensions in mm
Approx. weight 4.5 mg
General technical data
Climatic category
(IEC 60068-1)
55/125/56
Max. power
(at 25
C, on PCB) P
25
1)
150
mW
Resistance tolerance
R
R
/R
R
5
%
Rated temperature
T
R
25
C
Dissipation factor
(on PCB)
th
1)
approx. 2.5
mW/K
Thermal cooling time constant
(on PCB)
c
1)
approx. 3
s
Heat capacity
C
th
1)
approx. 7.5
mJ/K
Temperature measurement
B572**V
SMDs with nickel barrier termination, case size 0402
V2**
Page 2 of 14
Please read Important notes and
Cautions and warnings at the end of this document.
Electrical specification and ordering codes
R
25
No. of R/T
characteristic
B
25/50
K
B
25/85
K
B
25/100
K
Ordering code
470
8501
3500
3540
3550
3%
B57211V2471J060
3.3 k
8502
3940
3980
4000
3%
B57221V2332J060
4.7 k
8501
3500
3540
3550
3%
B57211V2472J060
4.7 k
8502
3940
3980
4000
3%
B57221V2472J060
10 k
8502
3940
3980
4000
3%
B57221V2103J060
22 k
8506
4473
4548
4575
3%
B57261V2223J060
33 k
8506
4473
4548
4575
3%
B57261V2333J060
47 k
8502
3940
3980
4000
3%
B57221V2473J060
Reliability data
SMD NTC thermistors are tested in accordance with IEC 60068. The parts are mounted on a
standardized PCB in accordance with IEC 60539-1.
Test
Standard
Test conditions
R
25
/R
25
(typical)
Remarks
Storage in
dry heat
IEC
60068-2-2
JIS C 0021
Storage at upper
category temperature
T: (125
2)
C
t: 1000 h
< 2%
Storage in damp
heat, steady state
IEC
60068-2-78
JIS C 0022
Temperature of air: (40
2)
C
Relative humidity of air:
(93 +2/ 3)%
Duration: 56 days
< 2%
Rapid temperature
cycling
IEC
60068-2-14
JIS C 0025
Lower test temperature:
55
C
Upper test temperature: 125
C
Number of cycles: 100
< 2%
Endurance
P
max
: 150 mW
T: (65
2)
C
t: 1000 h
< 2%
Solderability
IEC
60068-2-58
JIS C 0054
Solderability:
(215
3)
C, (3
0.3) s
(235
5)
C, (2
0.2) s
Resistance to soldering heat:
(260
5)
C, (10
1) s
95% of
terminations
wetted
Resistance drift
after soldering
Reflow soldering profile
< 1%
Temperature measurement
B572**V
SMDs with nickel barrier termination, case size 0402
V2**
Page 3 of 14
Please read Important notes and
Cautions and warnings at the end of this document.
R/T characteristics
B57211V2471J060
R/T No.
8501
T (
C)
B
25/100
= 3550 K, R
25
= 470
, T
R
= 25
C,
R
R
/R
R
=
5%
R
nom
[
]
R
min
[
]
R
max
[
]
R
R
/R
R
[
%]
T[
C]
(%/K)
55.0
26618
21787
31449
18.1
2.8
6.5
50.0
19333
16035
22630
17.1
2.7
6.3
45.0
14198
11925
16471
16.0
2.6
6.1
40.0
10537
8956
12119
15.0
2.6
5.9
35.0
7899
6790
9009
14.0
2.5
5.7
30.0
5979
5194
6764
13.1
2.4
5.5
25.0
4566
4007
5126
12.2
2.3
5.3
20.0
3518
3117
3919
11.4
2.2
5.1
15.0
2733
2444
3022
10.6
2.1
5.0
10.0
2140
1930
2350
9.8
2.0
4.8
5.0
1689
1536
1842
9.0
1.9
4.7
0.0
1342
1231
1454
8.3
1.8
4.5
5.0
1074
992.4
1156
7.6
1.7
4.4
10.0
865.6
805.5
925.7
6.9
1.6
4.3
15.0
701.9
657.7
746.0
6.3
1.5
4.1
20.0
572.7
540.3
605.1
5.7
1.4
4.0
25.0
470.0
446.5
493.5
5.0
1.3
3.9
30.0
387.9
366.0
409.8
5.6
1.5
3.8
35.0
321.9
301.9
341.9
6.2
1.7
3.7
40.0
268.6
250.4
286.7
6.8
1.9
3.6
45.0
225.2
208.7
241.6
7.3
2.1
3.5
50.0
189.7
174.9
204.5
7.8
2.3
3.4
55.0
160.5
147.2
173.9
8.3
2.5
3.3
60.0
136.5
124.5
148.5
8.8
2.7
3.2
65.0
116.5
105.7
127.3
9.3
3.0
3.1
70.0
99.92
90.19
109.6
9.7
3.2
3.0
75.0
86.01
77.25
94.76
10.2
3.4
3.0
80.0
74.32
66.43
82.21
10.6
3.7
2.9
85.0
64.46
57.35
71.57
11.0
3.9
2.8
90.0
56.11
49.69
62.53
11.4
4.2
2.7
95.0
49.01
43.20
54.81
11.8
4.4
2.7
100.0
42.95
37.69
48.20
12.2
4.7
2.6
105.0
37.76
33.00
42.52
12.6
5.0
2.5
110.0
33.30
28.98
37.62
13.0
5.2
2.5
115.0
29.45
25.53
33.38
13.3
5.5
2.4
120.0
26.13
22.55
29.70
13.7
5.8
2.4
125.0
23.24
19.98
26.50
14.0
6.1
2.3
Temperature measurement
B572**V
SMDs with nickel barrier termination, case size 0402
V2**
Page 4 of 14
Please read Important notes and
Cautions and warnings at the end of this document.
B57221V2332J060
R/T No.
8502
T (
C)
B
25/100
= 4000 K, R
25
= 3300
, T
R
= 25
C,
R
R
/R
R
=
5%
R
nom
[
]
R
min
[
]
R
max
[
]
R
R
/R
R
[
%]
T[
C]
(%/K)
55.0
317320
254460
380180
19.8
2.7
7.4
50.0
220740
179730
261750
18.6
2.6
7.1
45.0
155520
128460
182580
17.4
2.5
6.9
40.0
110900
92856
128950
16.3
2.4
6.6
35.0
80000
67848
92153
15.2
2.4
6.4
30.0
58349
50090
66607
14.2
2.3
6.2
25.0
43006
37346
48665
13.2
2.2
6.0
20.0
32017
28109
35924
12.2
2.1
5.8
15.0
24065
21349
26781
11.3
2.0
5.6
10.0
18254
16355
20153
10.4
1.9
5.4
5.0
13967
12633
15302
9.6
1.8
5.3
0.0
10777
9836
11718
8.7
1.7
5.1
5.0
8382
7716
9048
7.9
1.6
4.9
10.0
6569
6097
7041
7.2
1.5
4.8
15.0
5186
4852
5521
6.4
1.4
4.7
20.0
4123
3887
4360
5.7
1.3
4.5
25.0
3300
3135
3465
5.0
1.1
4.4
30.0
2658
2506
2810
5.7
1.3
4.3
35.0
2154
2018
2291
6.4
1.5
4.1
40.0
1757
1634
1879
7.0
1.7
4.0
45.0
1440
1331
1549
7.6
1.9
3.9
50.0
1187
1090
1284
8.2
2.1
3.8
55.0
984.0
898.1
1070
8.7
2.4
3.7
60.0
819.6
743.6
895.7
9.3
2.6
3.6
65.0
686.0
618.7
753.3
9.8
2.8
3.5
70.0
576.8
517.2
636.4
10.3
3.0
3.4
75.0
487.2
434.4
540.0
10.8
3.2
3.3
80.0
413.3
366.5
460.0
11.3
3.5
3.2
85.0
352.0
310.5
393.5
11.8
3.7
3.2
90.0
301.1
264.2
337.9
12.3
4.0
3.1
95.0
258.5
225.6
291.3
12.7
4.2
3.0
100.0
222.7
193.4
252.0
13.1
4.5
2.9
105.0
192.6
166.5
218.7
13.6
4.7
2.9
110.0
167.1
143.8
190.5
14.0
5.0
2.8
115.0
145.5
124.6
166.5
14.4
5.3
2.7
120.0
127.1
108.3
145.9
14.8
5.5
2.7
125.0
111.4
94.50
128.3
15.2
5.8
2.6
Temperature measurement
B572**V
SMDs with nickel barrier termination, case size 0402
V2**
Page 5 of 14
Please read Important notes and
Cautions and warnings at the end of this document.
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