EPCOS B57237 User Manual
查询B57237S0100M000供应商
Applications
■ Switch-mode power supplies
■ Soft-start motors, e.g. in vacuum cleaners
Features
■ Useable in series connections up to 265 V
■ Coated thermistor disk
■ Kinked leads of tinned copper wire
■ Wide resistance range
■ UL approval (E69802)
Options
Resistance tolerance < 20 % available on request
Delivery mode
Bulk (standard), cardboard tape, reeled or in Ammo pack
rms
B57237Inrush Current Limiters
S237
Dimensions in mm
Approx. weight 2 g
Climatic category (IEC 60068-1)
Max. power at 25
°C P
max
Resistance tolerance ∆RN/R
Rated temperature T
B value tolerance ∆B/B
Dissipation factor (in air)
Thermal cooling time constant (in air) τ
Heat capacity C
R
I
25
max
(25 °C)
Ω
A
No. of
R/T characteristic
B
K
25/100
1)
C
T
230 V
µF
δ
th
c
N
th
C
T
110 V
µF
N
1)
55/170/56
3,1
± 20 %
25
± 3 %
approx. 17
approx. 90
approx. 1530
Parameters for
1)
R(I)
kn
W
°C
mW/K
s
mJ/K
Ordering code
1,0 9,0 1201 2700 700 2800 0,622 – 1,27 B57237S0109M000
2,2 7,0 1202 2800 700 2800 0,806 – 1,30 B57237S0229M000
2,5 6,5 1202 2800 700 2800 0,843 – 1,30 B57237S0259M000
4,7 5,1 1203 2900 700 2800 1,03 – 1,32 B57237S0479M000
5,0 5,0 1203 2900 700 2800 1,05 – 1,32 B57237S0509M000
7,0 4,2 1302 3060 700 2800 1,16 – 1,33 B57237S0709M000
10 3,7 1308 3060 700 2800 1,29 – 1,34 B57237S0100M000
15 3,0 1302 3000 700 2800 1,49 – 1,33 B57237S0150M000
22 2,8 1304 3300 700 2800 1,57 – 1,37 B57237S0220M000
33 2,5 1304 3300 900 3600 1,78 – 1,37 B57237S0330M000
1) For details on the capacitance CT as well as on the parameters k and n refer to “Application Notes”, pages 40 –42.
136 05/02
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
B57237Inrush Current Limiters
S237
∆R
25/R25
Remarks
(typical)
< 10 % No visible
damage
°C
< 5 % No visible
damage
< 10 % No visible
°C
°C
damage
< 10 % No visible
damage
< 10 % No visible
damage
T
< 5 % No visible
damage
137 05/02
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