ICLB57237S237 Datasheet, PDF (3/14 Pages) EPCOS – NTC thermistors for inrush current limiting

Inrush current limiters
ICLs
B57237S0***M0**
S237
R₂₅
I_max
B_25/100
(0...25 °C)
ΩA
K
33 2.5
3300
60 1.6
4000
** = Delivery mode
00 = Bulk
51 = Reel packing
C 1)
test
230 V AC
µF
900
400
C 1)
test
110 V AC
µF
3600
1600
Param.
for R(I)¹⁾
k
1.78
1.77
Param.
for R(I)¹⁾
n
1.37
1.44
Ordering code
B57237S0330M0**
B57237S0600M0**
Reliability data
Test
Storage in
dry heat
Storage in damp
heat, steady state
Rapid temperature
cycling
Endurance
Cyclic
endurance
Transient
load
Standard Test conditions
IEC
60068-2-2
IEC
60068-2-78
IEC
60068-2-14
Storage at upper
category temperature
T: 170 °C
t: 1000 h
Temperature of air: 40 °C
Relative humidity of air: 93%
Duration: 21 days
Lower test temperature: 55 °C
Upper test temperature: 170 °C
Number of cycles: 10
I = I_max
t: 1000 h
I = I_max, 1000 cycles
On-time = 1 min
Cooling time = 6 min
Capacitance = C_test
Number of cycles: 1000
∆R₂₅/R₂₅
(typical)
< 10%
< 5%
< 10%
< 10%
< 10%
< 5%
Remarks
No visible
damage
No visible
damage
No visible
damage
No visible
damage
No visible
damage
No visible
damage
Note
The self-heating of a thermistor during operation depends on the load applied and the
applicable dissipation factor.
When loaded with maximum allowable current/power and the specified dissipation factor is
taken as a basis, the NTC thermistor may reach a mean temperature of up to 250 °C.
The heat developed during operation will also be dissipated through the lead wires. So the
contact areas, too, may become quite hot at maximum load.
When mounting NTC thermistors you have to ensure that there is an adequate distance
between the thermistor and all parts which are sensitive to heat or combustible.
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.
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