LESHAN RADIO COMPANY, LTD.

8A–2/2

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, (ºC)

+0.5A

0

-0.25A

-1.0A

1cm

Trr

NOTES:1.Rise Time=7ns max.

Input Impedance=1megohm.22pF.

2.Rise Time=10ns max.

Source Impedance=50 ohms.

(+)

PULSE

GENERAT O R

(NOTE 2)

(-)

D.U.T.

OSCILLOSCOPE

(NOTE 1)

1

Ω

NON.

INDUCTIVE

(+)

25Vdc

(APPROX)

(-)

50

Ω

10

Ω

NONINDUCTIVE

NONINDUCTIVE

FIG.1-TEST CIRCUIT DIAGRAM AND

REVERSE RECOVERY TIME CHARACTERISTIC

SET TIME

BASE FOR 10 ns/cm

20

40

60

80

100

120

.2

.4

.6

.8

1.0

1.2

1.4

10

1.0

.1

.01

.001

Pulse Width=300

µs

1% Duty Cycle

8.3msSingleHalfSine-Wave

(JEDECMethod)

.1

.2

.4

1.0

2

4

10

20

40

100

200

100

60

40

20

10

6

4

2

1

SF21¡«SF24

SF25¡«SF26

PERCENT OF RATED PEAK REVERSE VOLTAGE, (%)

FIG. 3 - TYPICAL REVERSE

CHARACTERISTICS

FIG. 6 - TYPICAL JUNCTION CAPACITANCE

FIG. 5 - MAXINUM NON-REPETITIVE

FOWARD SURGE CURRENT

REVERSE VOLTAGE,(V)

NUMBER OF CYCLES AT 60Hz

FIG. 4 - TYPICAL INSTANTANEOUS

FORWARD CHARACTERISTICS

INSTANTANEOUS FORWARD VOLTAGE,(V)