B57621C5102J062 [TDK]
NTC thermistors for temperature measurement;
| 型号： | B57621C5102J062 |
| 厂家： | 
TDK ELECTRONICS |
| 描述： | NTC thermistors for temperature measurement 温度补偿 电阻器 |
| 文件： | 总21页 (文件大小：448K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
NTC thermistors for
temperature measurement
SMD NTC thermistors,
case size 1206 (3216), standard series
Series/Type:
B57621C5
Date:
January 2016
© EPCOS AG 2016. Reproduction, publication and dissemination of this publication, enclosures hereto and the
information contained therein without EPCOS' prior express consent is prohibited.
EPCOS AG is a TDK Group Company.
Temperature measurement and compensation
SMD NTC thermistors, case size 1206 (3216)
B57621C5
Standard series
Applications
Dimensional drawing
Temperature measurement and
compensation
Features
SMD NTC with/ without inner electrodes
Nickel barrier termination
Excellent long-term aging stability in high
temperature environment
Options
Alternative resistance ratings, resistance
tolerances and B value tolerances available
on request.
Delivery mode
Dimensions in mm
Blister tape, 180-mm reel (standard)
Approx. weight 18 mg
General technical data
Operating temperature range
Max. power
Top
ꢀ55 ... 125
300
°C
mW
%
°C
mW/K
s
1)
(at 25 °C, on PCB) P25
Resistance tolerance
Rated temperature
Dissipation factor
Thermal cooling time constant
Heat capacity
∆RR/RR ±5, ±10
TR
25
1)
(on PCB)
(on PCB)
δth
approx. 5
approx. 10
approx. 50
1)
τc
1)
Cth
mJ/K
Electrical specification and ordering codes
∆RR/RR
%
R25
Ω
No. of R/T
characteristic
B25/50
K
B25/85
K
B25/100
K
Ordering code
1.0 k
4.7 k
10 k
15 k
±5, ±10 3206
±5, ±10 1309
±5, ±10 1010
±5, ±10 1008
3420
3430
3470
3480
3440
3500
3510
3550
3450 ±3% B57621C5102+062
3520 ±3% B57621C5472+062
3530 ±3% B57621C5103+062
3560 ±3% B57621C5153+062
+ = Resistance tolerance
J = ±5%
K = ±10%
1) Depends on mounting situation
Please read Cautions and warnings and
Important notes at the end of this document.
Page 2 of 21
Temperature measurement and compensation
SMD NTC thermistors, case size 1206 (3216)
B57621C5
Standard series
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
Remarks
(typical)
Storage in
dry heat
IEC
60068-2-2
Storage at upper
category temperature
< 3%1)
JIS C 0021 T: (125 ±2) °C
t: 1000 h
Storage in damp
heat, steady state
IEC
Temperature of air: (40 ±2) °C
< 3%
No visible
damage
60068-2-78 Relative humidity of air:
JIS C 0022 (93 +2/ꢀ3)%
Duration: 21 days
Rapid temperature IEC
Lower test temperature: ꢀ55 °C < 3%
cycling
60068-2-14 Upper test temperature: 125 °C
JIS C 0025 Number of cycles: 10
Endurance
Pmax: 300 mW
T: (65 ±2) °C
t: 1000 h
< 5%
Solderability
IEC
Solderability:
95% of
60068-2-58 (215 ±3) °C, (3 ±0.3) s
JIS C 0054 (245 ±5) °C, (3 ±0.3) s
terminations
wetted
Resistance to soldering heat:
(260 ±5) °C, (10 ±1) s
Resistance drift
after soldering
Reflow soldering profile
Wave soldering profile
< 5%
1) Except type B57621C5102+062 and B57621C5472+062 ∆R25/R25: < 6%
Please read Cautions and warnings and
Important notes at the end of this document.
Page 3 of 21
Temperature measurement and compensation
SMD NTC thermistors, case size 1206 (3216)
B57621C5
Standard series
R/T characteristics
1008
1010
1309
R/T No.
T (°C)
B25/100 = 3560 K
RT/R25
B25/100 = 3530 K
B25/100 = 3520 K
α (%/K) RT/R25
α (%/K) RT/R25
α (%/K)
ꢀ55.0 53.104
ꢀ50.0 39.318
ꢀ45.0 29.325
ꢀ40.0 22.03
ꢀ35.0 16.666
6.1
6.0
5.8
5.7
5.5
52.826
38.643
28.574
21.346
16.1
6.4
6.1
5.9
5.7
5.5
48.46
35.8
26.694
20.085
15.247
6.1
6.0
5.8
5.6
5.4
ꢀ30.0 12.696
5.4
5.2
5.1
4.9
4.8
12.256
9.4071
7.2862
5.6835
4.4698
5.4
5.2
5.0
4.9
4.7
11.674
9.0124
7.0136
5.5001
4.3451
5.3
5.1
4.9
4.8
4.6
ꢀ25.0
ꢀ20.0
ꢀ15.0
ꢀ10.0
9.7251
7.5171
5.8353
4.5686
ꢀ5.0
0.0
5.0
10.0
15.0
3.605
4.7
4.5
4.4
4.3
4.1
3.5385
2.8222
2.2649
1.83
4.6
4.5
4.3
4.2
4.1
3.4569
2.7688
2.2321
1.8105
1.4773
4.5
4.4
4.2
4.1
4.0
2.8665
2.2907
1.8438
1.492
1.4872
20.0
25.0
30.0
35.0
40.0
1.2154
1.0000
0.82976
0.68635
0.57103
4.0
3.9
3.8
3.7
3.6
1.2161
1.0000
0.82677
0.68708
0.57401
4.0
3.9
3.8
3.6
3.5
1.2122
1.0000
0.82924
0.69105
0.57861
3.9
3.8
3.7
3.6
3.5
45.0
50.0
55.0
60.0
65.0
0.48015
0.40545
0.3417
0.28952
0.24714
3.5
3.4
3.3
3.2
3.1
0.48181
0.40638
0.34427
0.29296
0.25035
3.5
3.4
3.3
3.2
3.1
0.48666
0.4111
0.34872
0.29699
0.2539
3.4
3.3
3.3
3.2
3.1
70.0
75.0
80.0
85.0
90.0
0.21183
0.18194
0.1568
0.13592
0.11822
3.1
3.0
2.9
2.8
2.8
0.21478
0.18501
0.15995
0.13881
0.12088
3.0
2.9
2.9
2.8
2.7
0.21786
0.18759
0.16208
0.1405
3.0
3.0
2.9
2.8
2.8
0.12217
95.0
100.0
105.0
110.0
115.0
0.1034
2.7
2.6
2.6
2.5
2.4
0.10563
2.7
2.6
2.5
2.5
2.4
0.10656
2.7
2.6
2.6
2.5
2.5
0.090741
0.079642
0.070102
0.061889
0.092597
0.081442
0.071842
0.063571
0.093213
0.081767
0.071922
0.063428
120.0
125.0
0.054785
0.048706
2.4
2.3
0.056407
0.050196
2.4
2.3
0.056078
0.049702
2.4
2.4
Please read Cautions and warnings and
Important notes at the end of this document.
Page 4 of 21
Temperature measurement and compensation
SMD NTC thermistors, case size 1206 (3216)
B57621C5
Standard series
R/T characteristics
3206
R/T No.
T (°C) B25/100 = 3450 K
T (°C) B25/100 = 3450 K
T (°C) B25/100 = 3450 K
RT/R25
α (%/K)
RT/R25
α (%/K)
RT/R25
α (%/K)
ꢀ55.0 59.147
ꢀ50.0 42.651
ꢀ45.0 31.088
ꢀ40.0 22.903
ꢀ35.0 17.052
6.7
6.4
6.2
6.0
5.8
10.0 1.8287
15.0 1.4855
20.0 1.2149
25.0 1.0000
30.0 0.82816
4.2
4.1
4.0
3.8
3.7
75.0 0.19136
80.0 0.16618
85.0 0.14484
90.0 0.12668
95.0 0.11117
2.9
2.8
2.7
2.7
2.6
ꢀ30.0 12.827
5.6
5.4
5.2
5.0
4.9
35.0 0.68985
40.0 0.57784
45.0 0.48658
50.0 0.41181
55.0 0.3502
3.6
3.5
3.4
3.3
3.2
100.0 0.09787
105.0 0.086428
110.0 0.076549
115.0 0.067992
120.0 0.060555
2.5
2.5
2.4
2.3
2.3
ꢀ25.0
ꢀ20.0
ꢀ15.0
ꢀ10.0
9.7461
7.477
5.7897
4.5234
ꢀ5.0
0.0
5.0
3.5643
2.8316
2.2671
4.7
4.5
4.4
60.0 0.29918
65.0 0.25672
70.0 0.2212
3.1
3.0
2.9
125.0 0.054073
2.2
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
Please read Cautions and warnings and
Important notes at the end of this document.
Page 5 of 21
Temperature measurement and compensation
SMD NTC thermistors, case size 1206 (3216)
B57621C5
Standard series
Taping and packing
1
Taping of SMD NTC thermistors
1.1
Cardboard tape for case size 0402 and 0603 (taping to IEC 60286-3)
Dimensions (mm)
Case size
Case size
0603
Tolerance
0402
(8-mm tape)
(8-mm tape)
A0 × B0
T2
0.60 × 1.15
0.70
0.95 × 1.80
1.10
±0.2
T
0.60
0.95
max.
D0
P0
P2
P1
W
1.50
1.50
±0.10
±0.101)
±0.05
±0.10
±0.30
±0.10
±0.05
min.
4.00
4.00
2.00
2.00
2.00
4.00
8.00
8.00
E
1.75
1.75
F
3.50
3.50
G
0.75
0.75
1) ≤0.2 mm over 10 sprocket holes.
Please read Cautions and warnings and
Page 6 of 21
Important notes at the end of this document.
Temperature measurement and compensation
SMD NTC thermistors, case size 1206 (3216)
B57621C5
Standard series
1.2
Blister tape for case size 0805 and 1206 (taping to IEC 60286-3)
Dimensions (mm)
Case size
Case size
1206
Tolerance
0805
(8-mm tape)
(8-mm tape)
A0 × B0
K0
T2
1.50 × 2.30
1.40
1.80 × 3.40
1.40
±0.2
max.
2.5
2.5
max.
D0
D1
P0
P2
P1
W
1.50
1.50
+0.10/–0
min.
0.30
0.30
4.00
4.00
±0.102)
±0.05
±0.10
±0.30
±0.10
±0.05
min.
2.00
2.00
4.00
4.00
8.00
8.00
E
1.75
1.75
F
3.50
3.50
G
0.75
0.75
2) ≤0.2 mm over 10 sprocket holes.
Please read Cautions and warnings and
Page 7 of 21
Important notes at the end of this document.
Temperature measurement and compensation
SMD NTC thermistors, case size 1206 (3216)
B57621C5
Standard series
1.3
Reel packing
Dimensions in mm
8-mm tape
180-mm reel
180 +0/ꢀ3
8.4 +1.5/ꢀ0
14.4 max.
330-mm reel
A
330 +0/ꢀ2.0
8.4 +1.5/ꢀ0
14.4 max.
W1
W2
Leader, trailer
Please read Cautions and warnings and
Important notes at the end of this document.
Page 8 of 21
Temperature measurement and compensation
SMD NTC thermistors, case size 1206 (3216)
B57621C5
Standard series
1.4
Packing units for discrete chip and array chip
Case size Chip thickness
Cardboard tape Blister tape
180-mm reel
pcs.
10000
4000
4000
3000
3000
3000
330-mm reel
inch/mm
th
0.5 mm
W
W
pcs.
50000
16000
16000
12000
12000
12000
0402/1005
0603/1608
0805/2012
8 mm
ꢀ
0.8 mm
0.8 mm
1.2 mm
0.8 mm
1.2 mm
8 mm
ꢀ
ꢀ
8 mm
8 mm
8 mm
8 mm
8 mm
1206/3216
ꢀ
ꢀ
2
Packing codes
The last two digits of the complete ordering code state the packing mode:
Last two digits
60
62
70
72
SMD
SMD
SMD
SMD
Cardboard tape
Blister tape
180-mm reel packing
180-mm reel packing
330-mm reel packing
330-mm reel packing
Cardboard tape
Blister tape
Please read Cautions and warnings and
Important notes at the end of this document.
Page 9 of 21
Temperature measurement and compensation
SMD NTC thermistors, case size 1206 (3216)
B57621C5
Standard series
Mounting instructions
1
Soldering
1.1
SMD NTC thermistors
SMD NTC thermistors can be provided with a nickel barrier termination or on special request with
silver-palladium termination. The usage of mild, non-activated fluxes for soldering is recommend-
ed as well as a proper cleaning of the PCB.
The nickel barrier layer of the silver/nickel/tin termination (see figure 1) prevents leaching of the
silver base metalization layer. This allows great flexibility in the selection of soldering parameters.
The tin prevents the nickel layer from oxidizing and thus ensures better wetting by the solder. The
nickel barrier termination is suitable for all commonly-used soldering methods.
Note: SMD NTCs with AgPd termination are not approved for lead-free soldering.
Figure 1
SMD NTC thermistors, structure of nickel barrier termination
1.1.1 Solderability (test to IEC 60068-2-58)
Preconditioning: Immersion into flux F-SW 32.
Evaluation criterion: Wetting of soldering areas ≥95%.
Solder
Bath temperature (°C)
215 ±3
Dwell time (s)
3 ±0.3
SnPb 60/40
SnAg (3.0 ... 4.0), Cu (0.5 ... 0.9)
245 ±3
3 ±0.3
1.1.2 Resistance to soldering heat (test to IEC 60068-2-58)
Preconditioning: Immersion into flux F-SW 32.
Evaluation criterion: Leaching of side edges ≤1/3.
Solder
Bath temperature (°C)
Dwell time (s)
10 ±1
SnPb 60/40
260 ±5
260 ±5
SnAg (3.0 ... 4.0), Cu (0.5 ... 0.9)
10 ±1
Please read Cautions and warnings and
Important notes at the end of this document.
Page 10 of 21
Temperature measurement and compensation
SMD NTC thermistors, case size 1206 (3216)
B57621C5
Standard series
Wave soldering
Temperature characteristic at component terminal with dual wave soldering
Solder joint profiles for silver/nickel/tin terminations
Please read Cautions and warnings and
Important notes at the end of this document.
Page 11 of 21
Temperature measurement and compensation
SMD NTC thermistors, case size 1206 (3216)
B57621C5
Standard series
Reflow soldering
Recommended temperature characteristic for reflow soldering following JEDEC J-STD-020D
Profile feature
Sn-Pb eutectic assembly Pb-free assembly
Preheat and soak
- Temperature min
- Temperature max
- Time
Average ramp-up rate
Liquidous temperature
Time at liquidous
Peak package body temperature Tp
Time (tP)3) within 5 °C of specified
classification temperature (Tc)
Tsmin
Tsmax
100 °C
150 °C
150 °C
200 °C
tsmin to tsmax 60 ... 120 s
Tsmax to Tp 3 °C/ s max.
60 ... 180 s
3 °C/ s max.
217 °C
60 ... 150 s
245 °C ... 260 °C2)
TL
tL
183 °C
60 ... 150 s
220 °C ... 235 °C2)
1)
20 s3)
30 s3)
Average ramp-down rate
Tp to Tsmax 6 °C/ s max.
6 °C/ s max.
Time 25 °C to peak temperature
maximum 6 min
maximum 8 min
1) Tolerance for peak profile temperature (TP) is defined as a supplier minimum and a user maximum.
2) Depending on package thickness. For details please refer to JEDEC J-STD-020D.
3) Tolerance for time at peak profile temperature (tP) is defined as a supplier minimum and a user maximum.
Note: All temperatures refer to topside of the package, measured on the package body surface.
Number of reflow cycles: 3
Please read Cautions and warnings and
Important notes at the end of this document.
Page 12 of 21
Temperature measurement and compensation
SMD NTC thermistors, case size 1206 (3216)
B57621C5
Standard series
Solder joint profiles for silver/nickel/tin terminations
1.1.3 Recommended geometry of solder pads
Recommended maximum dimensions (mm)
Case size
inch/mm
A
B
C
0402/1005 0.6
0603/1608 1.0
0805/2012 1.3
1206/3216 1.8
0.6
1.0
1.2
1.2
1.7
3.0
3.4
4.5
1.1.4 Notes
Iron soldering should be avoided, hot air methods are recommended for repair purposes.
Please read Cautions and warnings and
Important notes at the end of this document.
Page 13 of 21
Temperature measurement and compensation
SMD NTC thermistors, case size 1206 (3216)
B57621C5
Standard series
2
Conductive adhesion
An alternative to soldering is the gluing of thermistors with conductive adhesives. The benefit of
this method is that it involves no thermal stress. The adhesives used must be chemically inert.
3
Clamp contacting
Pressure contacting by means of clamps is particularly suitable for applications involving frequent
switching and high turn-on powers.
4
Sealing and potting
When thermistors are sealed, potted or overmolded, there must be no mechanical stress caused
by thermal expansion during the production process (curing / overmolding process) and during
later operation. The upper category temperature of the thermistor must not be exceeded. Ensure
that the materials used (sealing / potting compound and plastic material) are chemically neutral.
5
Cleaning
If cleaning is necessary, mild cleaning agents such as ethyl alcohol and cleaning gasoline are
recommended. Cleaning agents based on water are not allowed. Ultrasonic cleaning methods are
permissible.
6
Storage
In order to maintain their solderability, thermistors must be stored in a non-corrosive atmosphere.
Humidity, temperature and container materials are critical factors.
Do not store SMDs where they are exposed to heat or direct sunlight. Otherwise, the packing ma-
terial may be deformed or SMDs may stick together, causing problems during mounting. After
opening the factory seals, such as polyvinyl-sealed packages, use the SMDs as soon as possible.
The components should be left in the original packing. Touching the metallization of unsoldered
thermistors may change their soldering properties.
Storage temperature:
ꢀ25 °C up to 45 °C
Relative humidity (without condensation):
≤75% annual mean
<95%, maximum 30 days per annum
Solder the thermistors listed in this data book after shipment from EPCOS within the time speci-
fied:
SMDs:
12 months for Ni-barrier termination
6 months for AgPd termination
Please read Cautions and warnings and
Important notes at the end of this document.
Page 14 of 21
Temperature measurement and compensation
SMD NTC thermistors, case size 1206 (3216)
B57621C5
Standard series
7
Placement and orientation of SMD NTC thermistors on PCB
a) Component placement
It is recommended that the PC board
should be held by means of some
adequate supporting pins such as
shown left to prevent the SMDs from
being damaged or cracked.
b) Cracks
When placing a component near an
area which is apt to bend or a grid
groove on the PC board, it is advisable
to have both electrodes subjected to
uniform stress, or to position the
component's electrodes at right angles
to the grid groove or bending line (see
c) Component orientation).
c) Component orientation
Choose a mounting position that
minimizes the stress imposed on the
chip during flexing or bending of the
board.
Please read Cautions and warnings and
Important notes at the end of this document.
Page 15 of 21
Temperature measurement and compensation
SMD NTC thermistors, case size 1206 (3216)
B57621C5
Standard series
Cautions and warnings
General
See "Important notes".
Storage
Store thermistors only in original packaging. Do not open the package prior to processing.
Storage conditions in original packaging: storage temperature ꢀ25 °C ... +45 °C, relative
humidity ≤75% annual mean, <95% maximum 30 days per annum, dew precipitation is
inadmissible.
Do not store thermistors where they are exposed to heat or direct sunlight. Otherwise, the
packing material may be deformed or components may stick together, causing problems during
mounting.
Avoid contamination of thermistor surface during storage, handling and processing.
Avoid storage of thermistors in harmful environments like corrosive gases (SOx, Cl etc).
Use the components as soon as possible after opening the factory seals, i.e. the
polyvinyl-sealed packages.
Solder SMD NTC thermistors within the time specified after shipment from EPCOS. For SMD
components with nickel barrier termination 12 months, for SMD components with AgPd
termination 6 months.
Handling
NTC thermistors must not be dropped. Chip-offs or any other damage must not be caused
during handling of NTCs.
Do not touch components with bare hands. Gloves are recommended.
Avoid contamination of thermistor surface during handling.
Washing processes may damage the product due to the possible static or cyclic mechanical
loads (e.g. ultrasonic cleaning). They may cause cracks to develop on the product and its parts,
which might lead to reduced reliability or lifetime.
Soldering
Use resin-type flux or non-activated flux.
Insufficient preheating may cause ceramic cracks.
Rapid cooling by dipping in solvent is not recommended.
Complete removal of flux is recommended.
Please read Cautions and warnings and
Important notes at the end of this document.
Page 16 of 21
Temperature measurement and compensation
SMD NTC thermistors, case size 1206 (3216)
B57621C5
Standard series
Mounting
Ensure that no thermo-mechanical stress occurs due to production processes (curing or
overmolding processes) when thermistors are sealed, potted or overmolded or during their
subsequent operation. The maximum temperature of the thermistor must not be exceeded.
Ensure that the materials used (sealing/potting compound and plastic material) are chemically
neutral.
Electrodes/contacts must not be scratched or damaged before/during/after the mounting
process.
Contacts and housing used for assembly with the thermistor must be clean before mounting.
Ensure that adjacent materials are designed for operation at temperatures comparable to the
surface temperature of the thermistor. Be sure that surrounding parts and materials can
withstand the temperature.
Avoid contamination of the thermistor surface during processing.
The connections of sensors (e.g. cable end, wire end, plug terminal) may only be exposed to
an environment with normal atmospheric conditions.
Avoid using chemical substances as mounting aids. It must be ensured that no water or other
liquids enter the NTC thermistors (e.g. through plug terminals). In particular, water based
substances (e.g. soap suds) must not be used as mounting aids for sensors.
Operation
Use thermistors only within the specified operating temperature range.
Use thermistors only within the specified power range.
Environmental conditions must not harm the thermistors. Only use the thermistors under
normal atmospheric conditions or within the specified conditions.
Contact of NTC thermistors with any liquids and solvents should be prevented. It must be
ensured that no water enters the NTC thermistors (e.g. through plug terminals). For
measurement purposes (checking the specified resistance vs. temperature), the component
must not be immersed in water but in suitable liquids (e.g. perfluoropolyethers such as Galden).
Avoid dewing and condensation unless thermistor is specified for these conditions.
Be sure to provide an appropriate fail-safe function to prevent secondary product damage
caused by malfunction.
This listing does not claim to be complete, but merely reflects the experience of EPCOS AG.
Please read Cautions and warnings and
Important notes at the end of this document.
Page 17 of 21
Temperature measurement and compensation
SMD NTC thermistors, case size 1206 (3216)
B57621C5
Standard series
Symbols and terms
Symbol
A
English
Area
German
Fläche
B-Wert
B
B value
B25/100
B value determined by resistance
measurement at 25 °C and 100 °C
B-Wert, ermittelt durch Widerstands-
messungen bei 25 °C und 100 °C
Cth
I
Heat capacitance
Current
Wärmekapazität
Strom
N
Number (integer)
Anzahl (ganzzahliger Wert)
P25
Pdiss
Pel
Maximum power at 25 °C
Power dissipation
Electrical power
Maximale Leistung bei 25 °C
Verlustleistung
Elektrische Leistung
Pmax
Maximum power within stated
temperature range
Maximale Leistung im
angegebenenTemperaturbereich
∆RB/RB
Resistance tolerance caused by
spread of B value
Insulation resistance
Parallel resistance
Widerstandstoleranz, die durch die
Streuung des B-Wertes verursacht wird
Isolationswiderstand
Rins
RP
Parallelwiderstand
RR
Rated resistance
Nennwiderstand
∆RR/RR
RS
Resistance tolerance
Series resistance
Widerstandstoleranz
Serienwiderstand
RT
Resistance at temperature T
(e.g. R25 = resistance at 25 °C)
Widerstand bei Temperatur T
(z.B. R25 = Widerstand bei 25 °C)
T
Temperature
Temperatur
∆T
t
Temperature tolerance
Time
Temperaturtoleranz
Zeit
TA
Tmax
Ambient temperature
Upper category temperature
Umgebungstemperatur
Obere Grenztemperatur
(Kategorietemperatur)
Untere Grenztemperatur
(Kategorietemperatur)
Tmin
Lower category temperature
Top
TR
Tsurf
Operating temperature
Rated temperature
Surface temperature
Betriebstemperatur
Nenntemperatur
Oberflächentemperatur
V
Voltage
Spannung
Vins
Vop
Vtest
Insulation test voltage
Operating voltage
Test voltage
Isolationsprüfspannung
Betriebsspannung
Prüfspannung
Please read Cautions and warnings and
Important notes at the end of this document.
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Temperature measurement and compensation
SMD NTC thermistors, case size 1206 (3216)
B57621C5
Standard series
Symbol
English
German
α
Temperature coefficient
Tolerance, change
Dissipation factor
Temperaturkoeffizient
Toleranz, Änderung
Wärmeleitwert
∆
δth
τc
τa
Thermal cooling time constant
Thermal time constant
Thermische Abkühlzeitkonstante
Thermische Zeitkonstante
Abbreviations / Notes
Symbol
English
German
Surface-mounted devices
Oberflächenmontierbares Bauelement
*
To be replaced by a number in ordering Platzhalter für Zahl im Bestellnummern-
codes, type designations etc.
code oder für die Typenbezeichnung.
Platzhalter für einen Buchstaben.
Alle Maße sind in mm angegeben.
+
To be replaced by a letter.
All dimensions are given in mm.
The commas used in numerical values Verwendete Kommas in Zahlenwerten
denote decimal points. bezeichnen Dezimalpunkte.
Please read Cautions and warnings and
Important notes at the end of this document.
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Important notes
The following applies to all products named in this publication:
1. Some parts of this publication contain statements about the suitability of our products for
certain areas of application. These statements are based on our knowledge of typical re-
quirements that are often placed on our products in the areas of application concerned. We
nevertheless expressly point out that such statements cannot be regarded as binding
statements about the suitability of our products for a particular customer application.
As a rule, EPCOS is either unfamiliar with individual customer applications or less familiar
with them than the customers themselves. For these reasons, it is always ultimately incum-
bent on the customer to check and decide whether an EPCOS product with the properties de-
scribed in the product specification is suitable for use in a particular customer application.
2. We also point out that in individual cases, a malfunction of electronic components or
failure before the end of their usual service life cannot be completely ruled out in the
current state of the art, even if they are operated as specified. In customer applications
requiring a very high level of operational safety and especially in customer applications in
which the malfunction or failure of an electronic component could endanger human life or
health (e.g. in accident prevention or lifesaving systems), it must therefore be ensured by
means of suitable design of the customer application or other action taken by the customer
(e.g. installation of protective circuitry or redundancy) that no injury or damage is sustained by
third parties in the event of malfunction or failure of an electronic component.
3. The warnings, cautions and product-specific notes must be observed.
4. In order to satisfy certain technical requirements, some of the products described in this
publication may contain substances subject to restrictions in certain jurisdictions (e.g.
because they are classed as hazardous). Useful information on this will be found in our Ma-
terial Data Sheets on the Internet (www.epcos.com/material). Should you have any more de-
tailed questions, please contact our sales offices.
5. We constantly strive to improve our products. Consequently, the products described in this
publication may change from time to time. The same is true of the corresponding product
specifications. Please check therefore to what extent product descriptions and specifications
contained in this publication are still applicable before or when you place an order. We also
reserve the right to discontinue production and delivery of products. Consequently, we
cannot guarantee that all products named in this publication will always be available. The
aforementioned does not apply in the case of individual agreements deviating from the fore-
going for customer-specific products.
6. Unless otherwise agreed in individual contracts, all orders are subject to the current ver-
sion of the "General Terms of Delivery for Products and Services in the Electrical In-
dustry" published by the German Electrical and Electronics Industry Association
(ZVEI).
Page 20 of 21
Important notes
7. The trade names EPCOS, Alu-X, CeraDiode, CeraLink, CeraPad, CeraPlas, CSMP, CSSP,
CTVS, DeltaCap, DigiSiMic, DSSP, ExoCore, FilterCap, FormFit, LeaXield, MiniBlue,
MiniCell, MKD, MKK, MotorCap, PCC, PhaseCap, PhaseCube, PhaseMod, PhiCap, PQSine,
SIFERRIT, SIFI, SIKOREL, SilverCap, SIMDAD, SiMic, SIMID, SineFormer, SIOV, SIP5D,
SIP5K, TFAP, ThermoFuse, WindCap are trademarks registered or pending in Europe and
in other countries. Further information will be found on the Internet at
www.epcos.com/trademarks.
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