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3 - 3

VHFD 37

0.001

0.01

0.1

1

0

50

100

150

200

250

300

23

4

5 6 7 8 9

110

0.00.5

1.01.5

2.0

0

10

20

30

40

50

60

70

0

10203040

0

20

40

60

80

100

120

0

20406080

100 120 140

0.001

0.01

0.1

1

10

0.0

0.5

1.0

1.5

2.0

I

I

FSM

I

F

A

V

F

t

s

t

ms

P

tot

W

I

F(AV)M

A

T

amb

t

s

Z

thJH

K/W

A

0

20

406080 100 120

0

10

20

30

40

50

I

d(AV)M

T

H

A

V

A

°C

°C

V

Fig. 3 Forward current versus voltage

drop per diode

Fig. 4 Surge overload current

Fig. 6 Power dissipation versus direct output current and ambient temperature

Fig. 7 Max. forward current versus

heatsink temperature

Fig. 8 Transient thermal impedance junction to heatsink

T

T

typ.

T

T

25°C

max.

T

T

Constants for Z

iR

t

1

0.005

0.008

2

0.2

0.05

3

0.875

0.06

4

0.47

0.25

50Hz, 80% V

RRM

R

0.5 K/W

1.0 K/W

1.5 K/W

2.0 K/W

3.0 K/W

4.0 K/W

6.0 K/W