Data Sheet

1) For details on the capacitance C
test
as well as on the parameters k and n refer to "Application notes", chapters 1.6 and 1.7.
Applications
Switch-mode power supplies
Soft-start motors, e.g. in vacuum cleaners
Features
Useable in series connections
up to 265 V
RMS
Coated thermistor disk for line applications
Kinked leads of tinned copper wire
Wide resistance range
UL approval (E69802)
Options
Resistance tolerance <20% and alternative
lead configurations available on request
Delivery mode
Bulk (standard),
cardboard tape, reeled or in Ammo pack
Dimensional drawing
Dimensions in mm
Approx. weight 3 g
General technical data
Climatic category (IEC 60068-1) 55/170/21
Max. power (at 25 °C) P
max
3.9 W
Resistance tolerance ∆R
R
/R
R
±20 %
Rated temperature T
R
25 °C
Dissipation factor (in air) δ
th
approx. 20 mW/K
Thermal cooling time constant (in air) τ
c
approx. 80 s
Heat capacity C
th
approx. 1600 mJ/K
Electrical specification and ordering codes
R
25
Ω
I
max
(0...65 °C)
A
B
25/100
K
C
test
1)
230 V
µF
C
test
1)
110 V
µF
Param.
for R(I)
1)
k
Param.
for R(I)
1)
n
Ordering code
2.5 8.4 2800 700 2800 0.984 1.36 B57238S0259M000
3 7.4 2900 700 2800 1.04 1.36 B57238S0309M000
4.7 6.6 2965 700 2800 1.20 1.37 B57238S0479M000
5 6.4 2965 700 2800 1.23 1.37 B57238S0509M000
7 6.0 2965 700 2800 1.34 1.38 B57238S0709M000
8 5.5 3065 700 2800 1.40 1.39 B57238S0809M000
10 5.0 3065 700 2800 1.50 1.39 B57238S0100M000
15 4.4 3165 700 2800 1.67 1.40 B57238S0150M000
16 4.0 3165 700 2800 1.69 1.39 B57238S0160M000
Inrush current limiters B57238
ICLs S238
Page 2 of 15Please read Cautions and warnings and
Important notes at the end of this document.