B57238S0259M000_1 Datasheet, PDF (1/3 Pages) EPCOS – Switch-mode power supplies

Inrush Current Limiters
Applications
I Switch-mode power supplies
I Soft-start motors, e.g. in vacuum cleaners
Features
I Useable in series connections up to 265 V_rms
I Coated thermistor disk for line applications
I Kinked leads of tinned copper wire
I Wide resistance range
I UL approval (E69802)
Options
Resistance tolerance < 20 % available on request
Delivery mode
Bulk (standard), cardboard tape, reeled or in Ammo pack
16 max
B57238
S 238
7 max
7,5
ø1
TNT0365-4
Dimensions in mm
Approx. weight 3 g
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
P_max
∆R_N/R_N
T_N
∆B/B
δ_th
τ_c
C_th
55/170/56
3,9
± 20 %
25
±3%
approx. 20
approx. 80
approx. 1600
W
°C
mW/K
s
mJ/K
R₂₅
Ω
2,5
3,0
4,7
5,0
7,0
8,0
10
15
16
22
25
I_max
No. of
B_25/100
(0 … 65 °C) R/T char-
A
acteristic K
8,4
1202
2800
7,4
1203
2900
6,6
1207
2965
6,4
1207
2965
6,0
1207
2965
5,5
1208
3065
5,0
1208
3065
4,4
1209
3165
4,0
1209
3165
4,0
1210
3265
3,4
1210
3265
C_T1) C_T1) Parameters for
230 V 110 V R(I)¹⁾
µF µF _k
n
700 2800 0,98 – 1,36
700 2800 1,04 – 1,36
700 2800 1,20 – 1,37
700 2800 1,23 – 1,37
700 2800 1,34 – 1,38
700 2800 1,40 – 1,39
700 2800 1,50 – 1,39
700 2800 1,67 – 1,40
700 2800 1,69 – 1,39
700 2800 1,84 – 1,42
700 2800 1,88 – 1,40
Ordering code
B57238S0259M000
B57238S0309M000
B57238S0479M000
B57238S0509M000
B57238S0709M000
B57238S0809M000
B57238S0100M000
B57238S0150M000
B57238S0160M000
B57238S0220M000
B57238S0250M000
1) For details on the capacitance C_T as well as on the parameters k and n refer to “Application Notes”, pages 40 – 42.
138 05/02