LESHAN RADIO COMPANY, LTD.
8A2/2
25
50
75
100 125 150
175
3 . 0
2 . 0
1 . 0
Single Phase
Half Wave 60Hz
Resistive or
Inductive Load
100
10
1.0
0.1
.01
SF21-SF26
RATING AND CHARACTERISTIC CURVES OF SUPER FAST DIODES
1
2
5
10
20
50
100
90
75
60
50
45
30
15
FIG. 2 - TYPICAL FORWARD
CURRENT DERATING CURVE
AMBIENT TEMPER ATURE, (C)
+0.5A
0
-0.25A
-1.0A
1cm
T r r
NOTES:1.Rise Time=7ns max.
Input Impedance=1megohm.22pF.
2.Rise Time=10ns max.
Source Impedance=50 ohms.
( + )
P U L S E
G E N E R AT O R
( N O T E 2 )
( - )
D.U.T.
OSCILLOSCOPE
(NOTE 1)
1
N O N .
INDUCTIVE
(+)
25Vdc
(APPROX)
(-)
50
10
NONINDUCTIVE
NONINDUCTIVE
FIG.1-TEST CIRCUIT DIAGRAM AND
REVERSE RECOVERY TIME CHARACTERISTIC
SET TIME
A
VERAGE FOR
W
ARD CURRENT
,(A)
BASE FOR 10 ns/cm
20
40
60
80
100
120
T
J
=150C
T
J
=100C
T
J
=25C
.2
.4
.6
.8
1.0
1.2
1.4
10
1.0
.1
.01
.001
SF21 ~ SF24
SF25 ~ SF26
T
J
=25C
Pulse Width=300
s
1% Duty Cycle
8.3ms Single Half Sine-Wave
(JEDEC Method)
.1
.2
.4
1.0
2
4
10
20
40
100
200
100
60
40
20
10
6
4
2
1
T
J
=25
SF21SF24
SF25SF26
INST
ANT
ANEOUS REVERSE CURRENT (
A)
PERCENT OF RATED PEAK REVERSE VOLTAGE, (%)
FIG. 3 - TYPICAL REVERSE
CHARACTERISTICS
FIG. 6 - TYPICAL JUNCTION CAPACITANCE
FIG. 5 - MAXINUM NON-REPETITIVE
FOWARD SURGE CURRENT
JUNCTION CAP
ACIT
ANCE,(pF)
REVERSE VOLTAGE,(V)
PEAK FOR
W
ARD SURGE CURRENT
,(A)
NUMBER OF CYCLES AT 60Hz
FIG. 4 - TYPICAL INSTANTANEOUS
FORWARD CHARACTERISTICS
INSTANTANEOUS FORWARD VOLTAGE,(V)
INST
ANT
ANEOUS FOR
W
ARD CURRENT
, (A)
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