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B57235 (EPCOS) : Total 3 Pages

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Inrush Current Limiters
Applications
I Switch-mode power supplies
Features
I Useable in series connections up to 265 Vrms
I Coated thermistor disk
I Kinked leads of tinned copper wire
I Wide resistance range
I Small space requirement
I Cost-effective
I UL approval (E69802)
Options
Resistance tolerance < 20 % available on request
Delivery mode
Bulk (standard),
cardboard tape, reeled or in Ammo pack
www.DataSheet4U.com
Climatic category (IEC 60068-1)
Max. power at 25 °C
Resistance tolerance
Rated temperature
B value tolerance
Dissipation factor (in air)
Thermal cooling time constant (in air)
Heat capacity
Pmax
RN/RN
TN
B/B
δth
τc
Cth
B57235
S 235
ø9,5 max.
6 max.
ø0,6
5
TNT0411-B
Dimensions in mm
Approx. weight 0,8 g
55/170/56
1,8
± 20 %
25
±3%
approx. 9
approx. 60
approx. 540
W
°C
mW/K
s
mJ/K
R25
5,0
6,0
8,0
10,0
Imax
No. of
B25/100
(0 65 °C) R/T char-
A acteristic K
4,2
1202
2800
4,0
1202
2800
3,5
1203
2900
3,0
1203
2900
CT1) CT1) Parameters for
230 V 110 V R(I)1)
µF µF k
n
200 800 0,710 1,30
200 800 0,757 1,30
200 800 0,814 1,32
200 800 0,879 1,32
Ordering code
B57235S0509M000
B57235S0609M000
B57235S0809M000
B57235S0100M000
1) For details on the capacitance CT as well as on the parameters k and n refer to Application Notes, pages 40 42.
130 05/02



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Inrush Current Limiters
B57235
S 235
Reliability data
Test
Storage in
dry heat
Storage in damp
heat, steady state
Rapid temperature
cycling
Endurance
Cyclic
endurance
Transient
load
Standard
IEC
60068-2-2
IEC
60068-2-3
IEC
60068-2-14
Test conditions
R25/R25
(typical)
Storage at upper
category temperature
T: 170 °C
t: 1000 h
< 10 %
Temperature of air: 40 °C
Relative humidity of air: 93 %
Duration: 21 days
<5%
Lower test temperature: 55 °C < 10 %
Upper test temperature: 170 °C
Number of cycles: 10
I = Imax
t: 1000 h
< 10 %
I = Imax, 1000 cycles
On-time = 1 min
Cooling time = 6 min
< 10 %
Capacitance = CT
Number of cycles: 1000
<5%
Remarks
No visible
damage
No visible
damage
No visible
damage
No visible
damage
No visible
damage
No visible
damage
131 05/02



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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.
Fragen über Technik, Preise und Liefermöglichkeiten richten Sie bitte an den Ihnen nächstgelegenen Vertrieb der EPCOS AG
oder an unsere Vertriebsgesellschaften im Ausland. Bauelemente können aufgrund technischer Erfordernisse Gefahrstoffe ent-
halten. Auskünfte darüber bitten wir unter Angabe des betreffenden Typs ebenfalls über die zuständige Vertriebsgesellschaft ein-
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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