SMTPA Series
Telecommunication Protection
Ratings AND Charactieristic Curves
FIG.3 -- RELATIVE VARIATION OF HOLDING CURRENT
VERSUS JUNCTION TEMPERATURE
FIG.4 -- RELATIVE VARIATION OF BREAKOVER
VOLTAGE VERSUS JUNCTION TEMPERATURE
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
-40
-20
0
T
J
(
°
C)
20
40
60
80
100
120
1 .0 8
1 .0 6
1 .0 4
1 .0 2
1
.9 8
.9 6
.9 4
-4 0
-2 0
0
20
40
60
80
100
120
T
J
(
)
FFFFFIG.5
-- RELATIVE VARIATION OF LEAKAGE CURRENT
VERSUS JUNCTION TEMPERATURE (TYPICAL VALUES).
I
RM
[T
J
]/I
RM
[T
J
=25 ]
2000
1000
FIG.6 -- RELATIVE VARIATION OF THERMAL
IMPEDANCE VERSUS PULSE DURATION
V
R
=V
RM
T
J
( )
1E+2
Z
TH(J-A)
(
/W)
1E+1
100
10
1E+0
1
25
tp(s)
50
75
100
125
1E-1
1E-3
1E-2
1E-1
1E+0
1E+1
1E+2
5E+2
FIG.7 -- RELATIVE VARIATION OF JUNCTION CAPACITANCE VERSUS
REVERSE VOLTAGE APPLIED (TYPICAL VALUES)
C[V
R
]/C[V
R
=50V]
2.5
2
F=1MH
Z
1.5
1
.5
V
R
(V)
0
1
2
5
10
20
50
100
300
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