Vishay semiconductors – C&H Technology VS-HFA70FA120 User Manual
Page 4
VS-HFA70FA120
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Vishay Semiconductors
Revision: 29-Feb-12
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Document Number: 94289
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Fig. 3 - Typical Junction Capacitance vs. Reverse Voltage
Fig. 4 - Maximum Thermal Impedance Z
thJC
Characteristics (Per Leg)
Fig. 5 - Maximum Allowable Case Temperature
vs. Average Forward Current (Per Leg)
Fig. 6 - Forward Power Losses Characteristics (Per Leg)
10
100
1000
10
100
1000
10 000
C
T
-
J
u
n
c
ti
o
n
C
a
p
acit
an
ce
(p
F
)
V
R
- Reverse Voltage (V)
0.001
0.01
0.1
1
0.0001
0.001
0.01
0.1
1
t
1
- Rectangular Pulse Duration (s)
Z
thJC
- Thermal Impedance (°C/W)
Single pulse
(thermal resistance)
.
.
P
DM
t
1
t
2
Notes:
1. Duty factor D = t
1
/t
2
2. Peak T
J
= P
DM
x Z
thJC
+ T
C
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20
DC
10
0
25
50
75
100
125
150
175
0
10
20
30
40
50
60
70
80
90
A
llo
w
a
b
le
C
a
s
e
T
e
m
p
er
at
u
re (
°C)
I
F
- Average Forward Current (A)
Square wave (d = 0.5)
80 % rated V
R
applied
DC
0
50
100
150
200
0
10
20
30
40
50
60
70
Ave
ra
g
e
Pow
e
r Loss
(W)
I
F(AV)
- Average Forward Current (A)
DC
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
RMS Limit