25

2.5

0

0

2

1.5

1

0.5

75

50

175

100

125

150

RATING AND CHARACTERISTICS CURVES ( SF21 THRU SF27 )

FIG.2 TYPICAL FORWARD CURRENT

DERATING CURVE

FIG.1 TEST CIRCUIT DIAGRAM AND REVERSE RECOVERY TIME CHARACTERISTIC

PERCENT OF RATED PEAK REVERSE VOLTAGE, (%)

0

1.0

0.1

100

1000

10

60

20

40

80

100

120

140

FIG.3 TYPICAL REVERSE

CHARACTERISTICS

trr

+0.5A

50 W

NONINDUCTIVE

10 W

NONINDUCTIVE

0

-0.25A

-1.0A

1cm

SET TIME BASE FOR 50/100 ns/cm

NOTES: 1 Rise Time = 7ns max. Input Impedance =

1 megohm. 22pF.

2. Rise Time = 10ns max. Source Impedance =

50 ohms.

D.U.T

25 Vdc

(approx)

( - )

( - )

( + )

( + )

1

NON-

INDUCTIVE

OSCILLOSCOPE

(NOTE 1)

PULSE

GENERATOR

(NOTE 2)

Single Phase

Half Wave 60Hz

Resistive or

Inductive Load