by SEMIKRON
B 9 3
0898
Fast Recovery Rectifier
Diodes
1)
SKR 20 F
SKR 31 F
SKR 48 F
Features
Very short recovery times
Soft recovery under all
conditions
Up to 1200 V reverse voltage
Epoxy meets UL 94V-0
flammability classification
Typical Applications
Inverse diode for power
transistors
Inverter, UPS
Snubber and clamping diode
V
RSM
I
FRMS
(maximum values for continuous operation)
V
RRM
30 A
47 A
72 A
I
FAV
(sin. 180; T
case
= 85 C; 50 Hz)
V
20 A
31 A
48 A
1000
1200
SKR 20F10
SKR 20F12
SKR 31F10
SKR 31F12
SKR 48F10
SKR 48F12
Symbol
Conditions
SKR20F
SKR31F
SKR48F Units
I
FAV
sin. 180; T
case
= 85 C
20
31
48
A
I
FSM
T
vj
= 25 C; 10 ms
150
320
500
A
T
vj
= 150 C; 10 ms
140
300
450
A
i
2
t
T
vj
= 25 C; 8,3 ... 10 ms
110
510
1250
A
2
s
T
vj
= 150 C; 8,3 ... 10 ms
100
450
1000
A
2
s
I
RRM
T
vj
= 25 C
12
2)
19
3)
23
4)
A
T
vj
= 125 C
16
2)
25
3)
35
4)
A
Q
rr
T
vj
= 25 C
typ.
1,5
2)
2
3)
3
4)
C
T
vj
= 125 C
typ.
2,7
2)
4,5
3)
8
4)
C
t
rr
T
vj
= 25 C
typ.
80
2)
100
3)
80
4)
ns
I
R
T
vj
= 25 C; V
R
= V
RRM
0,1
0,1
0,2
mA
T
vj
= 125 C; V
R
= V
RRM
2
4
4
mA
V
F
T
vj
= 25 C;
max
(I
F
= . . . A)
2,5
(15)
2,35
(25)
2,5
(50)
V
A
V
(TO)
T
vj
= 150 C
1,2
1,2
1,2
V
r
T
T
vj
= 150 C
70
44
22
m
R
thjc
0,70
0,45
0,35
C/W
R
thch
0,30
0,30
0,25
C/W
T
vj
40 ... 150
C
T
stg
40 ... 150
C
M
1
to heatsink
SI Units
US units
0,55...0,8
4,8 ...7,1
0,7...1
6,2...8,8
0,7...1
6,2...8,8
Nm
lb. in.
w
approx.
2
5
5
g
Case
E 39
E 40
E 40
1)
CAL (controlled axial lifetime) technology, patent No. DE 43 10 44
2)
I
F
= 15 A, di/dt = 400 A/
s, V
R
= 600 V
3)
I
F
= 25 A, di/dt = 500 A/
s, V
R
= 600 V
4)
I
F
= 50 A, di/dt = 800 A/
s, V
R
= 600 V
by SEMIKRON
B 9 4
0898
S KR 48F .X LS - 6c
0
50
100
0
500
1000
1500
2000
2500
di
F
/dt
A/s
I
RM
A
V
R
= 600 V
T
vj
= 125C
I
FM
= 50 A
SKR 48F
S KR 31F .X LS - 6b
0
10
20
30
40
50
0
500
1000
1500
di
F
/dt
A/s
I
RM
A
V
R
= 600V
T
vj
= 125 C
I
FM
= 25 A
SKR 31F
S KR 20F .X LS - 6a
0
10
20
30
0
250
500
750
1000
di
F
/dt
A/s
I
RM
A
V
R
= 600V
T
vj
= 125 C
I
FM
= 15 A
SKR 20F
S KR 48F .X LS - 5c
0
5
10
15
0
500
1000
1500
2000
2500
di
F
/dt
A/s
Q
rr
C
I
FM
=
75 A
50 A
38 A
25 A
13 A
V
R
= 600 V
T
vj
= 125C
SKR 48F
S KR 31F .X LS - 5b
0
2
4
6
8
0
500
1000
1500
di
F
/dt
A/s
Q
rr
C
I
FM
=
40 A
25 A
15 A
10 A
5 A
V
R
= 600 V
T
vj
= 125 C
SKR 31F
S KR 20F .X LS - 5a
0
1
2
3
4
5
0
250
500
750
1000
di
F
/dt
A/s
Q
rr
C
I
FM
=
25 A
15 A
10 A
5 A
V
R
= 600 V
T
vj
= 125 C
SKR 20F
Fig. 5 a Typ. recovered charge
Fig. 5 b Typ. recovered charge
Fig. 6 b Typ. peak reverse recovery current
Fig. 6 c Typ. peak reverse recovery current
Fig. 5 c Typ. recovered charge
Fig. 6 a Typ. peak reverse recovery current
by SEMIKRON
B 9 5
0898
S KR 31F .X LS -15b
-40
-30
-20
-10
0
10
20
30
40
0
500
1000
-700
-600
-500
-400
-300
-200
-100
0
100
t
ns
V
I
RM
A
I
RM
V
R
SKR 31F
T
v j
= 125 C
di
F
/dt = 500 A/s
V
R
S KR 20F .X LS -8a
0
5
10
15
20
25
30
0
1
2
3
V
F
V
I
F
A
25C
125C
SKR 20F
SKR 20F .X LS-15a
-40
-30
-20
-10
0
10
20
30
40
0
500
1000
-700
-600
-500
-400
-300
-200
-100
0
100
t
ns
V
R
V
I
RM
A
I
RM
V
R
SKR 20F
T
v j
= 125 C
di
F
/dt = 400 A/s
S KR 48F .X LS -8c
0
25
50
75
100
0
1
2
3
V
F
V
I
F
A
25C
125C
SKR 48F
S KR 31F .X LS -8b
0
10
20
30
40
50
0
1
2
3
V
F
V
I
F
A
25C
125C
SKR 31F
Fig. 8 a Typ. forward characteristics
Fig. 8 b Typ. forward characteristics
Fig. 15 b Typ. reverse recovery characteristics
Fig. 15 c Typ. reverse recovery characteristics
Fig. 8 c Typ. forward characteristics
Fig. 15 a Typ. reverse recovery characteristics
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