B57238S0259M055 [EPCOS]
RESISTOR, TEMPERATURE DEPENDENT, NTC, 2.5ohm, THROUGH HOLE MOUNT, RADIAL LEADED;
| 型号： | B57238S0259M055 |
| 厂家： | 
EPCOS |
| 描述： | RESISTOR, TEMPERATURE DEPENDENT, NTC, 2.5ohm, THROUGH HOLE MOUNT, RADIAL LEADED |
| 文件： | 总3页 (文件大小：63K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Inrush Current Limiters
Applications
B57238
S 238
16 max
7 max
I Switch-mode power supplies
I Soft-start motors, e.g. in vacuum cleaners
Features
I Useable in series connections up to 265 Vrms
I Coated thermistor disk for line applications
I Kinked leads of tinned copper wire
I Wide resistance range
7,5
I UL approval (E69802)
ø1
Options
TNT0365-4
Resistance tolerance < 20 % available on request
Dimensions in mm
Approx. weight 3 g
Delivery mode
Bulk (standard), cardboard tape, reeled or in Ammo pack
Climatic category (IEC 60068-1)
55/170/56
3,9
20 %
25
Max. power at 25 °C
Resistance tolerance
Rated temperature
Pmax
∆RN/RN
TN
W
°C
B value tolerance
∆B/B
δth
τc
3 %
Dissipation factor (in air)
Thermal cooling time constant (in air)
Heat capacity
approx. 20
approx. 80
approx. 1600
mW/K
s
mJ/K
Cth
1)
1)
R25
Imax
No. of
B25/100 CT
CT
Parameters for
Ordering code
(0 … 65 °C) R/T char-
230 V 110 V R(I)1)
Ω
A
acteristic
K
µF
µF
k
n
2,5
8,4
1202
1203
1207
1207
1207
1208
1208
1209
1209
1210
1210
2800
2900
2965
2965
2965
3065
3065
3165
3165
3265
3265
700
700
700
700
700
700
700
700
700
700
700
2800 0,98
2800 1,04
2800 1,20
2800 1,23
2800 1,34
2800 1,40
2800 1,50
2800 1,67
2800 1,69
2800 1,84
2800 1,88
– 1,36
– 1,36
– 1,37
– 1,37
– 1,38
– 1,39
– 1,39
– 1,40
– 1,39
– 1,42
– 1,40
B57238S0259M000
B57238S0309M000
B57238S0479M000
B57238S0509M000
B57238S0709M000
B57238S0809M000
B57238S0100M000
B57238S0150M000
B57238S0160M000
B57238S0220M000
B57238S0250M000
3,0
4,7
5,0
7,0
8,0
7,4
6,6
6,4
6,0
5,5
5,0
4,4
4,0
4,0
3,4
10
15
16
22
25
1) For details on the capacitance CT as well as on the parameters k and n refer to “Application Notes”, pages 40–42.
138 05/02
Inrush Current Limiters
Reliability data
B57238
S 238
Test
Standard
Test conditions
∆R25/R25
Remarks
(typical)
Storage in
dry heat
IEC
60068-2-2
Storage at upper
category temperature
T: 170 °C
< 10 %
No visible
damage
t: 1000 h
Storage in damp
heat, steady state
IEC
60068-2-3
Temperature of air: 40 °C
Relative humidity of air: 93 %
Duration: 21 days
< 5 %
No visible
damage
Rapid temperature IEC
Lower test temperature: – 55 °C < 10 %
No visible
damage
cycling
60068-2-14 Upper test temperature: 170 °C
Number of cycles: 10
Endurance
I = Imax
t: 1000 h
< 10 %
< 10 %
No visible
damage
Cyclic
endurance
I = Imax, 1000 cycles
On-time = 1 min
No visible
damage
Cooling time = 6 min
Transient
load
Capacitance = CT
Number of cycles: 1000
< 5 %
No visible
damage
139 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
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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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-
tives.
Due to technical requirements components may contain dangerous substances. For information on the type in question please
also contact one of our Sales Offices.
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