53 05/02
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
■Ni barrier termination (AgNiSn)
■High accuracy: ± 5 % in resistance,
B value tolerance down to ± 1,5 % available
on request
■Excellent long-term ageing stability in
high-temperature and high-humidity environment
■Superior resistance stability during soldering
(change <1 %)
Options
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) P251)
Resistance tolerance ∆RN/RN
Rated temperature TN
B value tolerance ∆B/B
Dissipation factor (on PCB) δth1)
Thermal cooling time constant (on PCB) τc1)
Heat capacity Cth1)
55/125/56
210
± 5 %, ± 10 %
25
± 3 %
approx. 3,5
approx. 10,0
approx. 35,0
mW
°C
mW/K
s
mJ/K
R25
Ω
No. of R/T
characteristic
B25/50
K
B25/85
K
B25/100
K
Ordering code
47 8501 3470 3540 3550 B57411V2470+062
100 8501 3470 3540 3550 B57411V2101+062
150 8501 3470 3540 3550 B57411V2151+062
220 8501 3470 3540 3550 B57411V2221+062
330 8501 3470 3540 3550 B57411V2331+062
* Slimline version 0,9 max.
* available upon request
Dimensions in mm
Approx. weight 13 mg
Termination
0,5±0,25
1,25±0,15
2,0±0,2
TNT0421-1-E
1,3 max.
*)
1) Depends on mounting situation
B574**Temperature Measurement
V4**
SMD NTC Thermistors with Nickel Barrier Termination, Size 0805
54 05/02
+: J for ∆RN/RN = ± 5 %
Kfor
∆RN/RN = ± 10 %
470 8502 3940 3980 4000 B57421V2471+062
680 8502 3940 3980 4000 B57421V2681+062
1,0 k 8502 3940 3980 4000 B57421V2102+062
1,5 k 8502 3940 3980 4000 B57421V2152+062
10 k 8502 3940 3980 4000 B57421V2103+062
2,2 k 8503 4390 4470 4500 B57431V2222+062
3,3 k 8503 4390 4470 4500 B57431V2332+062
4,7 k 8503 4390 4470 4500 B57431V2472+062
6,8 k 8503 4390 4470 4500 B57431V2682+062
10 k 8503 4390 4470 4500 B57431V2103+062
15 k 8503 4390 4470 4500 B57431V2153+062
22 k 8503 4390 4470 4500 B57431V2223+062
33 k 8503 4390 4470 4500 B57431V2333+062
47 k 8503 4390 4470 4500 B57431V2473+062
68 k 8503 4390 4470 4500 B57431V2683+062
100 k 8503 4390 4470 4500 B57431V2104+062
R25
Ω
No. of R/T
characteristic
B25/50
K
B25/85
K
B25/100
K
Ordering code
B574**Temperature Measurement
V4**
SMD NTC Thermistors with Nickel Barrier Termination, Size 0805
55 05/02
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 ∆R25/R25
(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
60068-2-3
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 Pmax: 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 %
B574**Temperature Measurement
V4**
SMD NTC Thermistors with Nickel Barrier Termination, Size 0805
Herausgegeben von EPCOS AG
Unternehmenskommunikation, Postfach 80 17 09, 81617 München, DEUTSCHLAND
(
++49 89 636 09, FAX (0 89) 636-2 26 89
EPCOS AG 2002. Vervielfältigung, Veröffentlichung, Verbreitung und Verwertung dieser Broschüre und ihres Inhalts ohne aus-
drückliche Genehmigung der EPCOS AG nicht gestattet.
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zuholen.
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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