Temperature Measurement
SMD NTC Thermistors with Nickel Barrier Termination, Size 0805
Applications
I
Temperature measurement and compensation in
B574**
V 4**
1,25±0,15
1,3 max.
*)
2,0±0,2
– mobile phone applications
(e.g. battery pack, TCXO, LCD)
– data systems
– automotive electronics
Features
I
Multilayer SMD NTC with inner electrodes
I
Ni barrier termination (AgNiSn)
I
High accuracy:
±
5 % in resistance,
Termination
0,5±0,25
TNT0421-1-E
B
value tolerance down to
±
1,5 % available
on request
I
Excellent long-term ageing stability in
high-temperature and high-humidity environment
I
Superior resistance stability during soldering
(change <1 %)
Options
* Slimline version 0,9 max.
*
available upon request
Dimensions in mm
Approx. weight 13 mg
Alternative resistance ratings, resistance tol.
<
5 % and
B
value tol. < 3 % available on request
Delivery mode
Blister tape, 180-mm reel, PU: 3000 pcs (standard); 330-mm reel, PU: 12000 pcs (on request)
Climatic category (IEC 60068-1)
Max. power at 25
°
C (on PCB)
Resistance tolerance
Rated temperature
B
value tolerance
Dissipation factor (on PCB)
Thermal cooling time constant (on PCB)
Heat capacity
R
25
No. of
R/T
characteristic
8501
8501
8501
8501
8501
B
25/50
K
3470
3470
3470
3470
3470
P
25
1)
∆
R
N
/R
N
T
N
∆
B/B
δ
th
1)
τ
c
1)
C
th
1)
B
25/85
K
3540
3540
3540
3540
3540
55/125/56
210
±
5 %,
±
10 %
25
±
3%
approx. 3,5
approx. 10,0
approx. 35,0
B
25/100
K
3550
3550
3550
3550
3550
B57411V2470+062
B57411V2101+062
B57411V2151+062
B57411V2221+062
B57411V2331+062
mW
°
C
mW/K
s
mJ/K
Ordering code
Ω
47
100
150
220
330
1) Depends on mounting situation
53
05/02
Temperature Measurement
SMD NTC Thermistors with Nickel Barrier Termination, Size 0805
B574**
V 4**
R
25
No. of
R/T
characteristic
8502
8502
8502
8502
8502
8503
8503
8503
8503
8503
8503
8503
8503
8503
8503
8503
B
25/50
K
3940
3940
3940
3940
3940
4390
4390
4390
4390
4390
4390
4390
4390
4390
4390
4390
B
25/85
K
3980
3980
3980
3980
3980
4470
4470
4470
4470
4470
4470
4470
4470
4470
4470
4470
B
25/100
K
4000
4000
4000
4000
4000
4500
4500
4500
4500
4500
4500
4500
4500
4500
4500
4500
Ordering code
Ω
470
680
1,0 k
1,5 k
10 k
2,2 k
3,3 k
4,7 k
6,8 k
10 k
15 k
22 k
33 k
47 k
68 k
100 k
B57421V2471+062
B57421V2681+062
B57421V2102+062
B57421V2152+062
B57421V2103+062
B57431V2222+062
B57431V2332+062
B57431V2472+062
B57431V2682+062
B57431V2103+062
B57431V2153+062
B57431V2223+062
B57431V2333+062
B57431V2473+062
B57431V2683+062
B57431V2104+062
+: J for
∆
R
N
/R
N
=
±
5 %
K for
∆
R
N
/R
N
=
±
10 %
54
05/02
Temperature Measurement
SMD NTC Thermistors with Nickel Barrier Termination, Size 0805
Reliability data
B574**
V 4**
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
IEC
60068-2-3
JIS C 0022
IEC
60068-2-14
JIS C 0025
Test conditions
Storage at upper
category temperature
T:
(125
±
2)
°
C
t:
1000 h
Temperature of air: (40
±
2)
°
C
Relative humidity of air:
(93 +2/–3) %
Duration: 56 days
∆
R
25
/R
25
(typical)
<2%
Remarks
Storage in damp
heat, steady state
<2%
Rapid temperature
cycling
Endurance
Lower test temperature: – 55
°
C < 2 %
Upper test temperature: 125
°
C
Number of cycles: 100
P
max
: 210 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
Wave soldering profile
<1%
55
05/02
Herausgegeben von EPCOS AG
Unternehmenskommunikation, Postfach 80 17 09, 81617 München, DEUTSCHLAND
++49 89 636 09, FAX (0 89) 636-2 26 89
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EPCOS AG 2002. Vervielfältigung, Veröffentlichung, Verbreitung und Verwertung dieser Broschüre und ihres Inhalts ohne aus-
drückliche Genehmigung der EPCOS AG nicht gestattet.
Bestellungen unterliegen den vom ZVEI empfohlenen Allgemeinen Lieferbedingungen für Erzeugnisse und Leistungen der Elek-
troindustrie, soweit nichts anderes vereinbart wird.
Diese Broschüre ersetzt die vorige Ausgabe.
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Published by EPCOS AG
Corporate Communications, P.O. Box 80 17 09, 81617 Munich, GERMANY
++49 89 636 09, FAX (0 89) 636-2 26 89
EPCOS AG 2002. Reproduction, publication and dissemination of this brochure and the information contained therein without
EPCOS’ prior express consent is prohibited.
Purchase orders are subject to the General Conditions for the Supply of Products and Services of the Electrical and Electronics
Industry recommended by the ZVEI (German Electrical and Electronic Manufacturers’ Association), unless otherwise agreed.
This brochure replaces the previous edition.
For questions on technology, prices and delivery please contact the Sales Offices of EPCOS AG or the international Representa-
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