ICP-S Technical Manual
Overcurrent Protection Elements
Rev.A
13/13
10. Precautions
1. Set the breaking current two to ten times as high as the rated current.
Use the ICP-S so that the open-circuit voltage between the terminals after the ICP-S breaks
the current will be a maximum of 50 V. Unless the ICP-S is used under these conditions, the
mold may be damaged or internal resistance may remain after the ICP-S breaks the current.
2. Do not use the ICP-S for the primary side of commercial power supply, or otherwise the mold
may be damaged by arcing after the ICP-S breaks the current.
0.001
0.01
0.1
1
10
100
1000
10000
0.01
Time (msec)
I
2
t (A
2
- ms)
0.1
1
10
100
1000
10000
100000
I
2
t-t
Characteristic Curve (ICP-S0.5)
Ta=25
°
C
A :Effective pulse breaking
line (with no margin)
B: Effective pulse critical line
(with no margin)
C: Effective pulse recommended
critical line (with margin)
0.001
0.01
0.1
1
10
100
1000
10000
0.01
Time (msec)
I
2
t (A
2
- ms)
0.1
1
10
100
1000
10000
100000
I
2
t-t
Characteristic Curve (ICP-S0.7)
Ta=25
°
C
A :Effective pulse breaking
line (with no margin)
B: Effective pulse critical line
(with no margin)
C: Effective pulse recommended
critical line (with margin)
0.001
0.01
0.1
1
10
100
1000
10000
0.01
Time (msec)
I
2
t (A
2
- ms)
0.1
1
10
100
1000
10000
100000
I
2
t-t
Characteristic Curve (ICP-S1.0)
Ta=25
°
C
A :Effective pulse breaking
line (with no margin)
B: Effective pulse critical line
(with no margin)
C: Effective pulse recommended
critical line (with margin)
0.001
0.01
0.1
1
10
100
1000
10000
0.01
I
2
t (A
2
- ms)
0.1
1
10
100
1000
10000
100000
Ta=25
°
C
Time (msec)
I
2
t-t
Characteristic Curve (ICP-S1.2)
A :Effective pulse breaking
line (with no margin)
B: Effective pulse critical line
(with no margin)
C: Effective pulse recommended
critical line (with margin)