Inrush current limiters
ICLs
B57236
S236
R
25
Ω
80
120
I
max
(0...65
°C)
A
1.6
1.5
B
25/100
K
3300
3450
C
test1)
230 V
µF
400
400
C
test1)
110 V
µF
1600
1600
Param.
for R(I)
1)
k
1.64
1.74
Param.
for R(I)
1)
n
1.37
1.39
Ordering code
B57236S0800M000
B57236S0121M000
Reliability data
Test
Storage in
dry heat
Standard
IEC
60068-2-2
Test conditions
∆R
25
/R
25
(typical)
< 10%
Remarks
No visible
damage
Storage in damp
heat, steady state
Rapid temperature
cycling
Endurance
Cyclic
endurance
Transient
load
Note
Storage at upper
category temperature
T: 170
°C
t: 1000 h
IEC
Temperature of air: 40
°C
60068-2-78 Relative humidity of air: 93%
Duration: 21 days
IEC
Lower test temperature: 55
°C
60068-2-14 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
< 5%
No visible
damage
No visible
damage
No visible
damage
No visible
damage
No visible
damage
< 10%
< 10%
< 10%
< 5%
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 C
test
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 3 of 15
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