EPCOS B57238S0259L002

Inrush Current Limiters
B57238
Insulation Voltage 1000 VDC for 1 s, ∆R N/RN = ± 15 %
S 238
Applications
17 max.
7 max.
23 max.
■ Switch-mode power supplies
■ Soft-start motors, e.g. in vacuum cleaners
Features
■ Close resistance tolerance,
32+3
■
■
■
■
■
ø1
improved insulation voltage
Useable in series connections up to 265 Vrms
Coated thermistor disk
Kinked leads of tinned copper wire
Wide resistance range
UL approval (E69802)
7,5
TNT0293-3
Dimensions in mm
Approx. weight 3 g
Delivery mode
Bulk (standard),
cardboard tape, reeled or in Ammo pack
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
Test voltage (t = 1 s)
CT1) CT1) Parameters for
230 V 110 V R(I) 1)
µF
µF
k
n
W
°C
mW/K
s
mJ/K
VDC
Ω
No. of
Imax
(0 … 65 °C) R/T charA
acteristic
2,5
8,4
1202
2800
700
2800
0,98
– 1,36
B57238S0259L002
3,0
7,4
1203
2900
700
2800
1,04
– 1,36
B57238S0309L002
5,0
6,4
1207
2965
700
2800
1,23
– 1,37
B57238S0509L002
R 25
B25/100
55/170/56
3,9
± 15 %
25
±3%
approx. 20
approx. 80
approx. 1600
1000
Pmax
∆R N/R N
TN
∆B/B
δth
τc
Cth
VT
K
Ordering code
1) For details on the capacitance CT as well as on the parameters k and n refer to “Application Notes”, pages 40 – 42.
140 05/02
Inrush Current Limiters
B57238
Insulation Voltage 1000 VDC for 1 s, ∆R N/RN = ± 15 %
S 238
Reliability data
Test
Standard
Test conditions
∆R 25/R25
(typical)
Remarks
Storage in
dry heat
IEC
60068-2-2
Storage at upper
category temperature
T: 170 °C
t: 1000 h
< 10 %
No visible
damage
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
cycling
IEC
60068-2-14
Lower test temperature: – 55 °C < 10 %
Upper test temperature: 170 °C
Number of cycles: 10
No visible
damage
Endurance
I = Imax
t: 1000 h
< 10 %
No visible
damage
Cyclic
endurance
I = Imax, 1000 cycles
On-time = 1 min
Cooling time = 6 min
< 10 %
No visible
damage
Transient
load
Capacitance = C T
Number of cycles: 1000
<5%
No visible
damage
141 05/02
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Unternehmenskommunikation, Postfach 80 17 09, 81617 München, DEUTSCHLAND
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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.
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Due to technical requirements components may contain dangerous substances. For information on the type in question please
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