NTC thermistors for
temperature measurement
SMD NTC thermistors
with nickel barrier termination,
case size 0603
Series/Type:
Date:
B573**V
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.
Temperature measurement
SMDs with nickel barrier termination, case size 0603
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 (standard);
330-mm reel (on request)
General technical data
Climatic category
Max. power
Resistance tolerance
Rated temperature
Dissipation factor
Thermal cooling time constant
Heat capacity
(IEC 60068-1)
(at 25
°C,
on PCB) P
251)
∆R
R
/R
R
T
R
(on PCB)
δ
th1)
(on PCB)
τ
c1)
C
th1)
55/125/56
180
±3, ±5
25
approx. 3
approx. 4
approx. 12
Dimensional drawing
B573**V
V3**
Dimensions in mm
Approx. weight 6 mg
mW
%
°C
mW/K
s
mJ/K
1) Depends on mounting situation
Please read
Important notes
and
Cautions and warnings
at the end of this document.
Page 2 of 33
Temperature measurement
SMDs with nickel barrier termination, case size 0603
Electrical specification and ordering codes
R
25
Ω
47
100
150
220
330
680
1.0 k
1.5 k
2.2 k
4.7 k
10 k
10 k
47 k
No. of R/T
characteristic
8501
8501
8501
8501
8501
8502
8502
8502
8502
8500
8502
8505
8502
B
25/50
K
3500
3500
3500
3500
3500
3940
3940
3940
3940
3590
3940
3380
3940
B
25/85
K
3540
3540
3540
3540
3540
3980
3980
3980
3980
3635
3980
3435
3980
B
25/100
K
3550
±3%
3550
±3%
3550
±3%
3550
±3%
3550
±3%
4000
±3%
4000
±3%
4000
±3%
4000
±3%
3650
±3%
4000
±3%
3460
±3%
4000
±3%
B573**V
V3**
Ordering code
B57311V2470+060
B57311V2101+060
B57311V2151+060
B57311V2221+060
B57311V2331+060
B57321V2681+060
B57321V2102+060
B57321V2152+060
B57321V2222+060
B57301V2472+060
B57321V2103+060
B57351V2103+060
B57321V2473+060
+ = Resistance tolerance
H =
±3%
J =
±5%
Please read
Important notes
and
Cautions and warnings
at the end of this document.
Page 3 of 33
Temperature measurement
SMDs with nickel barrier termination, case size 0603
B573**V
V3**
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
Storage in
dry heat
Standard
IEC
60068-2-2
JIS C 0021
Test conditions
∆R
25
/R
25
(typical)
< 2%
Remarks
Storage in damp
heat, steady state
Rapid temperature
cycling
Endurance
Solderability
Storage at upper
category temperature
T: (125
±2) °C
t: 1000 h
IEC
Temperature of air: (40
±2) °C
60068-2-78 Relative humidity of air:
JIS C 0022 (93 +2/ 3)%
Duration: 56 days
IEC
Lower test temperature: 55
°C
60068-2-14 Upper test temperature: 125
°C
JIS C 0025 Number of cycles: 100
P
max
: 180 mW
T: (65
±2) °C
t: 1000 h
IEC
Solderability:
60068-2-58 (215
±3) °C,
(3
±0.3)
s
JIS C 0054 (235
±5) °C,
(2
±0.2)
s
Resistance to soldering heat:
(260
±5) °C,
(10
±1)
s
Reflow soldering profile
Wave soldering profile
< 2%
< 2%
< 2%
95% of
terminations
wetted
Resistance drift
after soldering
< 1%
< 2%
2)
2) For B57351V2103+060
Please read
Important notes
and
Cautions and warnings
at the end of this document.
Page 4 of 33
Temperature measurement
SMDs with nickel barrier termination, case size 0603
R/T characteristics
B57311V2470H060
R/T No.
T (°C)
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
10.0
5.0
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0
55.0
60.0
65.0
70.0
75.0
80.0
85.0
90.0
95.0
100.0
105.0
110.0
115.0
120.0
125.0
8501
B
25/100
= 3550 K, R
25
= 47
Ω,
T
R
= 25
°C, ∆R
R
/R
R
=
±
3%
R
nom
[Ω]
R
min
[Ω]
R
max
[Ω]
∆R
R
/R
R
[±%]
∆T[±°C]
2662
1933
1420
1054
789.9
597.9
456.6
351.8
273.3
214.0
168.9
134.2
107.4
86.56
70.19
57.27
47.00
38.79
32.19
26.86
22.52
18.97
16.05
13.65
11.65
9.992
8.601
7.432
6.446
5.611
4.901
4.295
3.776
3.330
2.945
2.613
2.324
2232
1642
1221
916.7
694.8
531.3
409.8
318.7
249.9
197.3
157.0
125.7
101.4
82.28
67.18
55.17
45.59
37.38
30.84
25.58
21.32
17.87
15.04
12.72
10.81
9.219
7.897
6.792
5.864
5.081
4.418
3.855
3.375
2.964
2.612
2.308
2.045
3092
2224
1619
1191
885.1
664.4
503.4
384.9
296.8
230.7
180.8
142.7
113.5
90.84
73.20
59.36
48.41
40.20
33.55
28.13
23.71
20.07
17.07
14.58
12.50
10.76
9.304
8.072
7.028
6.141
5.383
4.734
4.176
3.695
3.279
2.918
2.604
16.1
15.1
14.0
13.0
12.0
11.1
10.2
9.4
8.6
7.8
7.0
6.3
5.6
4.9
4.3
3.7
3.0
3.6
4.2
4.8
5.3
5.8
6.3
6.8
7.3
7.7
8.2
8.6
9.0
9.4
9.8
10.2
10.6
11.0
11.3
11.7
12.0
2.5
2.4
2.3
2.2
2.1
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.0
0.9
0.8
1.0
1.1
1.3
1.5
1.7
1.9
2.1
2.3
2.5
2.8
3.0
3.2
3.4
3.7
3.9
4.2
4.4
4.7
4.9
5.2
B573**V
V3**
α
(%/K)
6.5
6.3
6.1
5.9
5.7
5.5
5.3
5.1
5.0
4.8
4.7
4.5
4.4
4.3
4.1
4.0
3.9
3.8
3.7
3.6
3.5
3.4
3.3
3.2
3.1
3.0
3.0
2.9
2.8
2.7
2.7
2.6
2.5
2.5
2.4
2.4
2.3
Please read
Important notes
and
Cautions and warnings
at the end of this document.
Page 5 of 33
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