ICL_B57235_S235 Datasheet, PDF (2/14 Pages) EPCOS – NTC thermistors for inrush current limiting

Inrush current limiters
ICLs
B57235S0***M0**
S235
Applications
Switch-mode power supplies
Dimensional drawing
Features
Useable in series connections up to 265 V_RMS
Coated thermistor disk
Kinked leads of tinned copper wire
Wide resistance range
Small space requirement
Cost-effective
UL approval (E69802)
Options
Resistance tolerance <20% and alternative lead
configurations available on request
Dimensions in mm
Approx. weight 0.8 g
Delivery mode
Bulk (standard) or with cardboard tape on 350-mm reel
General technical data
Climatic category
Max. power
Resistance tolerance
Rated temperature
Dissipation factor
Thermal cooling time constant
Heat capacity
(IEC 60068-1)
(at 25 °C)
(in air)
(in air)
P_max
∆R_R/R_R
T_R
δ_th
τ_c
C_th
55/170/21
1.8
±20
25
approx. 9
approx. 60
approx. 540
W
%
°C
mW/K
s
mJ/K
Electrical specification and ordering codes
R₂₅
Ω
4.7
5
6
8
10
I_max
(0...65 °C)
A
4.4
4.2
4.0
3.5
3.0
B_25/100
K
2800
2800
2800
2900
2900
C 1)
test
230 V AC
µF
200
200
200
200
200
C 1)
test
110 V AC
µF
800
800
800
800
800
Param.
for R(I)¹⁾
k
0.700
0.710
0.757
0.814
0.879
Param.
for R(I)¹⁾
n
1.30
1.30
1.30
1.32
1.32
Ordering code
B57235S0479M0**
B57235S0509M0**
B57235S0609M0**
B57235S0809M0**
B57235S0100M0**
** = Delivery mode
00 = Bulk
51 = Reel packing
1) For details on the capacitance Ctest as well as on the parameters k and n refer to "Application notes", chapters 1.6 and 1.7.
Please read Cautions and warnings and
Important notes at the end of this document.
Page 2 of 14