Datasheet

1) For details on the capacitance C
test
please refer to "Application notes", chapter 1.6.
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
Manufacturer's logo, NTC and resistance value
stamped on
UL approval (E69802)
Options
Resistance tolerance <20% and alternative lead
configurations available on request
Delivery mode
Bulk (standard) or with cardboard tape on 500-mm reel
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
C
test
1)
230 V AC
µF
C
test
1)
110 V AC
µF
R
min
(@ I
max
, 25 °C)
Ω
Ordering code
** = Delivery mode
00 = Bulk
51 = Reel packing
2.5 8.4 700 2800 0.054 B57238S0259M0**
3 7.4 700 2800 0.068 B57238S0309M0**
4.7 6.6 700 2800 0.090 B57238S0479M0**
5 6.4 700 2800 0.097 B57238S0509M0**
7 6.0 700 2800 0.113 B57238S0709M0**
8 5.5 700 2800 0.131 B57238S0809M0**
Inrush current limiters B57238S0***M0**
ICLs S238
Page 2 of 18Please read Cautions and warnings and
Important notes at the end of this document.