B57020M2 [EPCOS]
NTC thermistors for temperature measurement; NTC热敏电阻温度测量
| 型号： | B57020M2 |
| 厂家： | 
EPCOS |
| 描述： | NTC thermistors for temperature measurement |
| 文件： | 总9页 (文件大小：191K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
NTC thermistors for
temperature measurement
Probe assemblies
Series/Type:
B57020M2
Date:
February 2009
© EPCOS AG 2009. Reproduction, publication and dissemination of this publication, enclosures hereto and the
information contained therein without EPCOS' prior express consent is prohibited.
Temperature measurement
Probe assemblies
B57020M2
M2020
Applications
Dimensional drawing
Cabinet and evaporator in refrigerators and
deep freezers
Features
Thermistor in molded plastic case with cable
outlet
Highly resistant to water/moisture
PVC-insulated connecting cable (white)
Conductor cross section: 2 × 0.34 mm2
Construction based on
DIN EN 60 730 -1/VDE protection class 2
UL approval (E252167)
Options
Alternative head dimensions, resistance
ratings, rated temperatures, resistance
tolerances and cable lengths available on
request
PVC-free connecting cable on request
Color markings on cable available on request
Single insulated versions with twin wires
available on request
Dimensions in mm
Delivery mode
Bulk
General technical data
Climatic category
Max. power
(IEC 60068-1)
(at 25 °C)
40/080/56
350
∆RR/RR ±2
P25
mW
%
°C
mW/K
s
MΩ
Resistance tolerance
Rated temperature
Dissipation factor
Thermal time constant
Insulation resistance
TR
δth
τa
0
(in air)
(in water)
(V = 500 V DC)
approx. 10
approx. 35
> 1000
Rins
Electrical specification and ordering codes
l
R25
R0
No. of R/T
B25/100
Ordering code
mm
Ω
Ω
characteristic K
5000
5000
5000
16330
16330
16330
2003
2003
2003
3980 ±1.5% 900 ±30
3980 ±1.5% 2000 ±30
3980 ±1.5% 2800 ±30
B57020M2502A017
B57020M2502A020
B57020M2502A001
Please read Cautions and warnings and
Important notes at the end of this document.
Page 2 of 9
Temperature measurement
Probe assemblies
B57020M2
M2020
Reliability data
Test
Standard
Test conditions
∆R25/R25
Remarks
(typical)
Storage in
dry heat
IEC
60068-2-2
Storage at upper
category temperature
T: 80 °C
< 2%
No visible
damage
t: 1000 h
Storage in damp
heat, steady state
IEC
Temperature of air: 40 °C
< 2%
< 2%
No visible
damage
60068-2-78 Relative humidity of air: 93%
Duration: 56 days
Storage in coldness
Storage at lower
category temperature
T: ꢀ40 °C
No visible
damage
t: 1000 h
Rapid temperature IEC
Lower test temperature: ꢀ40 °C < 2%
No visible
damage
cycling (in air)
60068-2-14 Upper test temperature: 80 °C
Time to change from lower to
upper temperature: <30 s
Number of cycles: 1000
Medium: air
Storage in water
Temperature of water: 30 °C
t: 4000 h
< 2%
No visible
damage
Applied voltage with drop resistor
10 kΩ: 10 V DC switched
between on (ton = 30 min) and
off (toff = 30 min)
Temperature
cycling test
Lower test temperature: ꢀ30 °C < 2%
Upper test temperature: 10 °C
Test frequency <15 min under
wetness and frozen water
Number of cycles: 50000
Medium: air
No visible
damage
Voltage proof test
Insulation test
3750 V AC,
1 min
No flashover
The sensors are placed in a
vessel containing metallic balls of
1 mm diameter (with total
immersed head). The applied
voltage is 500 V DC.
Above
1000 MΩ
Please read Cautions and warnings and
Important notes at the end of this document.
Page 3 of 9
Temperature measurement
Probe assemblies
B57020M2
M2020
R/T characteristics
2003
R/T No.
T (°C) B25/100 = 3980 K
T (°C) B25/100 = 3980 K
T (°C) B25/100 = 3980 K
RT/R25
α (%/K)
RT/R25
α (%/K)
RT/R25
α (%/K)
ꢀ55.0 97.578
ꢀ50.0 67.65
ꢀ45.0 47.538
ꢀ40.0 33.831
ꢀ35.0 24.359
7.5
7.2
7.0
6.7
6.5
20.0 1.2492
25.0 1.0000
30.0 0.80575
35.0 0.65326
40.0 0.5329
4.5
4.4
4.3
4.1
4.0
95.0 0.079225
100.0 0.068356
105.0 0.059247
110.0 0.051531
115.0 0.044921
3.0
2.9
2.8
2.8
2.7
ꢀ30.0 17.753
ꢀ25.0 13.067
6.3
6.0
5.8
5.6
5.5
45.0 0.43715
50.0 0.36064
55.0 0.29908
60.0 0.24932
65.0 0.20886
3.9
3.8
3.7
3.6
3.5
120.0 0.039282
125.0 0.034387
130.0 0.030186
135.0 0.02665
140.0 0.023594
2.7
2.6
2.5
2.5
2.4
ꢀ20.0
ꢀ15.0
ꢀ10.0
9.7228
7.3006
5.5361
ꢀ5.0
0.0
5.0
10.0
15.0
4.2332
3.266
2.5392
1.9902
1.5709
5.3
5.1
5.0
4.8
4.7
70.0 0.17578
75.0 0.14863
80.0 0.12621
85.0 0.10763
90.0 0.092159
3.4
3.3
3.2
3.1
3.1
145.0 0.020931
150.0 0.018616
155.0 0.016612
2.4
2.3
2.3
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
Please read Cautions and warnings and
Important notes at the end of this document.
Page 4 of 9
Temperature measurement
Probe assemblies
B57020M2
M2020
Cautions and warnings General
See "Important notes" at the end of this document.
Storage
Store thermistors only in original packaging. Do not open the package prior to storage.
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 thermistors within the time specified after shipment from EPCOS.
For leaded components this is 24 months, for SMDs 12 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.
Bending / twisting leads
A lead (wire) may be bent at a minimum distance of twice the wire’s diameter plus 4 mm from
the component head or housing. When bending ensure the wire is mechanically relieved at the
component head or housing. The bending radius should be at least 0.75 mm.
Twisting (torsion) by 180° of a lead bent by 90° is permissible at 6 mm from the bottom of the
thermistor body.
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 5 of 9
Temperature measurement
Probe assemblies
B57020M2
M2020
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.
Tensile forces on cables or leads must be avoided during mounting and operation.
Bending or twisting of cables or leads directly on the thermistor body is not permissible.
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. Galden).
Avoid dewing and condensation unless thermistor is specified for these conditions.
Bending or twisting of cables and/or wires is not permissible during operation of the sensor in
the application.
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 6 of 9
Temperature measurement
Probe assemblies
B57020M2
M2020
Symbols and terms
Symbol
English
German
Fläche
A
Area
AWG
American Wire Gauge
Amerikanische Norm für Drahtquerschnitte
B
B value
B-Wert
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.
Page 7 of 9
Temperature measurement
Probe assemblies
B57020M2
M2020
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.
Page 8 of 9
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).
7. The trade names EPCOS, BAOKE, Alu-X, CeraDiode, CSMP, CSSP, CTVS, DSSP,
MiniBlue, MKK, MLSC, MotorCap, PCC, PhaseCap, PhaseCube, PhaseMod, SIFERRIT,
SIFI, SIKOREL, SilverCap, SIMDAD, SIMID, SineFormer, SIOV, SIP5D, SIP5K, 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.
Page 9 of 9
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