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查询B57238S0259L002供应商
N/RN
= ± 15 %
B57238Inrush Current Limiters
S238Insulation Voltage 1000 VDC for 1 s, ∆R
Applications
■ Switch-mode power supplies
■ Soft-start motors, e.g. in vacuum cleaners
Features
■ Close resistance tolerance,
improved insulation voltage
■ Useable in series connections up to 265 V
■ Coated thermistor disk
■ Kinked leads of tinned copper wire
■ Wide resistance range
■ UL approval (E69802)
rms
Delivery mode
Bulk (standard),
cardboard tape, reeled or in Ammo pack
Climatic category (IEC 60068-1)
Max. power at 25
Resistance tolerance ∆RN/R
Rated temperature T
°C P
max
N
B value tolerance ∆B/B
Dissipation factor (in air)
Thermal cooling time constant (in air) τ
Heat capacity C
Test voltage (t = 1 s) V
δ
th
c
th
T
17 max.
ø1
7,5
7 max.
23 max.
32+3
TNT0293-3
Dimensions in mm
Approx. weight 3 g
55/170/56
3,9
N
± 15 %
25
W
°C
± 3 %
approx. 20
approx. 80
approx. 1600
1000
mW/K
s
mJ/K
VDC
1)
R
25
Ω
I
max
(0 … 65 °C)
A
No. of
R/T characteristic
B
K
25/100
C
230 V
µF
1)
C
T
Parameters for
T
110 V
R(I)
µF
kn
1)
Ordering code
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
1) For details on the capacitance CT as well as on the parameters k and n refer to “Application Notes”, pages 40 –42.
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N/RN
Reliability data
Test Standard Test conditions
Storage in
dry heat
IEC
60068-2-2
Storage at upper
category temperature
T: 170
°C
t: 1000 h
Storage in damp
heat, steady state
IEC
60068-2-3
Temperature of air: 40
Relative humidity of air: 93 %
Duration: 21 days
Rapid temperature
cycling
IEC
60068-2-14
Lower test temperature: – 55
Upper test temperature: 170
Number of cycles: 10
Endurance I = I
max
t: 1000 h
Cyclic
endurance
, 1000 cycles
I = I
max
On-time = 1 min
Cooling time = 6 min
Transient
load
Capacitance = C
Number of cycles: 1000
= ± 15 %
°C
T
∆R
25/R25
(typical)
< 10 % No visible
< 5 % No visible
< 10 % No visible
°C
°C
< 10 % No visible
< 10 % No visible
< 5 % No visible
B57238Inrush Current Limiters
S238Insulation Voltage 1000 VDC for 1 s, ∆R
Remarks
damage
damage
damage
damage
damage
damage
141 05/02
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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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